Fluke 726 Users Manual
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® 726 Multifunction Process Calibrator Users Manual September 2005 © 2005 Fluke Corporation. All rights reserved. All product names are trademarks of their respective companies. LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is three years and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption. Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country. Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period. To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point). THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY. Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision. Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A. 11/99 Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands Table of Contents Title Introduction.................................................................................................................... Contacting Fluke............................................................................................................ Standard Equipment...................................................................................................... Safety Information ......................................................................................................... Symbols .................................................................................................................... Getting Acquainted with the Calibrator .......................................................................... Input and Output Terminals ...................................................................................... Keys.......................................................................................................................... Display ...................................................................................................................... Configuration Menus ..................................................................................................... Contrast Adjustment ................................................................................................. Shut Down Mode ...................................................................................................... CJC........................................................................................................................... Celcius and Fahrenheit (°C and °F).......................................................................... Frequency Pulse Output Voltage.............................................................................. Pulse Output Frequency ........................................................................................... i Page 1 1 3 3 7 8 8 10 13 14 14 15 15 15 15 15 726 Users Manual HART Resistor ON/OFF .......................................................................................... Getting Started ............................................................................................................... Voltage to Voltage Test ............................................................................................. Using Measure Mode ..................................................................................................... Measuring Electrical Parameters (Upper Display) .................................................... Current Measurement with Loop Power .................................................................... Measuring Electrical Parameters (Lower Display) .................................................... Measuring Temperature ............................................................................................ Using Thermocouples........................................................................................... Using Resistance-Temperature Detectors (RTDs) ............................................... PRT Custom Curves ................................................................................................. Measuring Pressure .................................................................................................. Zeroing with Absolute Pressure Modules.................................................................. Using Source Mode........................................................................................................ Sourcing 4 to 20 mA.................................................................................................. Simulating a 4- to 20-mA Transmitter........................................................................ Sourcing Other Electrical Parameters ....................................................................... Simulating Thermocouples........................................................................................ Simulating RTDs ....................................................................................................... Sourcing Pressure..................................................................................................... Setting 0 % and 100 % Output Parameters ................................................................... % Error Functionality ................................................................................................. Stepping and Ramping the Output................................................................................. Manually Stepping the mA Output............................................................................. Auto Ramping the Output.......................................................................................... Storing and Recalling Setups......................................................................................... Store a Setup ............................................................................................................ Recall a Setup ........................................................................................................... ii 16 16 16 18 18 18 20 21 21 24 24 27 28 30 30 30 32 34 36 38 41 41 41 42 42 42 42 43 Contents (continued) Storing and Recalling Data............................................................................................ Storing Data.............................................................................................................. Recall Data ............................................................................................................... Pulse Train Source/Read .............................................................................................. Calibrating a Transmitter ............................................................................................... Calibrating a Pressure Transmitter................................................................................ Calibrating an I/P Device ............................................................................................... Pressure Switch Test..................................................................................................... Testing an Output Device .............................................................................................. Remote Control Commands .......................................................................................... HART Functionality...................................................................................................... Maintenance .................................................................................................................. Replacing the Batteries............................................................................................. Cleaning the Calibrator ............................................................................................. Service Center Calibration or Repair ........................................................................ Replacement Parts ................................................................................................... Accessories ................................................................................................................... External Fluke Pressure Module Compatibility ......................................................... Specifications ................................................................................................................ DC Voltage Measurement and Source ..................................................................... DC mA Measurement and Source ............................................................................ Ohms Measurement ................................................................................................. Ohms Source............................................................................................................ Frequency Measurement.......................................................................................... Frequency Source .................................................................................................... Temperature, Thermocouples .................................................................................. RTD Accuracy (Read and Source) (ITS-90) ............................................................. iii 43 43 44 44 45 47 49 51 51 52 52 53 53 54 54 54 56 56 59 59 59 60 60 60 61 61 63 726 Users Manual Loop Power Supply ................................................................................................... Pulse Read and Pulse Source .................................................................................. Pressure Measurement ............................................................................................. General Specifications .............................................................................................. Index iv 64 64 64 65 List of Tables Table Title Page 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. Summary of Source and Measure Functions ....................................................................... International Symbols ........................................................................................................... Input/Output Terminals and Connectors............................................................................... Key Functions ....................................................................................................................... Thermocouple Types Accepted ............................................................................................ RTD Types Accepted............................................................................................................ mA Step Values .................................................................................................................... Replacement Parts ............................................................................................................... Fluke Pressure Module Compatibility ................................................................................... Pressure Modules................................................................................................................. 2 7 9 11 22 25 42 54 56 57 v 726 Users Manual vi List of Figures Figure Title Page 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. Standard Equipment ............................................................................................................. Input/Output Terminals and Connectors............................................................................... Keys...................................................................................................................................... Elements of a Typical Display .............................................................................................. Adjusting the Contrast .......................................................................................................... Voltage-to-Voltage Test ........................................................................................................ Measuring Voltage and Current Output ................................................................................ Connections for Supplying Loop Power................................................................................ Measuring Electrical Parameters.......................................................................................... Measuring Temperature with a Thermocouple ..................................................................... Measuring Temperature with an RTD, Measuring 2-, 3-, and 4-Wire Resistance ................ Gage and Differential Pressure Modules.............................................................................. Connections for Measuring Pressure ................................................................................... Connections for Simulating a 4- to 20-mA Transmitter......................................................... Electrical Sourcing Connections........................................................................................... Connections for Simulating a Thermocouple........................................................................ Connection for Simulating a 3- and 4-Wire RTD .................................................................. 6 8 10 13 14 17 18 19 20 23 26 27 29 31 33 35 37 vii 726 Users Manual 18. 19. 20. 21. 22. 23. 24. 25. Connections for Sourcing Pressure ...................................................................................... SAVE DATA Menu Showing Measurement Memory Location 3, 1 ....................................... Calibrating a Thermocouple Transmitter ............................................................................... Calibrating a Pressure-to-Current (P/I) Transmitter .............................................................. Calibrating a Current-to-Pressure (I/P) Transmitter .............................................................. Calibrating a Chart Recorder ................................................................................................ Replacing the Batteries ......................................................................................................... Replacement Parts................................................................................................................ viii 40 44 46 48 50 52 53 55 Multifunction Process Calibrator Introduction The Fluke 726 Multifunction Process Calibrator (referred to as “the Calibrator”) is a handheld, battery-operated instrument that measures and sources electrical and physical parameters. See Table 1. In addition to the functions in Table 1, the Calibrator also has the following features and functions: • A split-screen display. The upper display allows users to measure volts, current, and pressure only. The lower display allows the user to measure and source volts, current, pressure, resistance temperature detectors, thermocouples, frequency, and ohms. • A thermocouple (TC) input/output terminal and internal isothermal block with automatic referencejunction temperature compensation. • Stores and recalls setups. • Manual and automatic stepping and ramping. • • Stores and recalls calibration screens. Control the Calibrator remotely from a PC running a terminal emulator program. Contacting Fluke To order accessories, receive operating assistance, or locate the nearest Fluke distributor or Service Center, call: USA: 1-888-44-FLUKE (1-888-443-5853) Canada: 1-800-36-FLUKE (1-800-363-5853) Europe: +31 402-675-200 Japan: +81-3-3434-0181 Singapore: +65-738-5655 Anywhere in the world: +1-425-446-5500 USA Service: 1-888-99-FLUKE (1-888-993-5853) Or, visit Fluke's Web site at www.fluke.com. To register your product, visit register.fluke.com 1 726 Users Manual Table 1. Summary of Source and Measure Functions Function Measure Source dc V 0 V to 30 V 0 V to 20 V dc mA 0 to 24 mA 0 to 24 mA Frequency 2 CPM to 15 kHz 2 CPM to 15 kHz Resistance 0 Ω to 4000 Ω 5 Ω to 4000 Ω Thermocouple Types E, J, K, T, B, R, S, L, U, N, C, XK, BP Pt100 Ω (385) Pt100 Ω (3926) Pt100 Ω (3916) Pt200 Ω (385) RTD (ResistanceTemperature Detector) Pt500 Ω (385) Pt1000 Ω (385) Ni120 (672) CU10 2 Pressure 29 modules ranging from 1.0 in. H2O to 10,000 psi Pulse 1-100,000 Freqency Max 10 kHz Other functions Loop supply, HART resistor, pressure switch test, save screen, step, ramp, memory, cold junction compensation 1-10,000 Frequency Range 2 CPM to 10 kHz Multifunction Process Calibrator Standard Equipment Standard Equipment Safety Information If the Calibrator is damaged or something is missing, contact the place of purchase immediately. To order replacement parts, see Table 8. The items listed below and shown in Figure 1 are included with the Calibrator. The Calibrator is designed in accordance with CAN/CSAC22.2 NO. 61010-1-04, UL 61010-1, and ISA 82.02.01 • TL75 test leads • AC72 alligator clips • Stackable alligator clip test leads • 726 Product Overview (not shown in Figure 1) • 725/726 CD-ROM (contains Users Manual; not shown in Figure 1) • 4 AA Batteries (installed) XW Warning To avoid possible electric shock or personal injury, use the Calibrator only as specified in this manual, otherwise the protection provided by the Calibrator may be impaired. A Warning identifies conditions and actions that pose hazard(s) to the user. A Caution identifies conditions and actions that may damage the Calibrator or the equipment under test. 3 726 Users Manual XW Warning To avoid possible electric shock or personal injury: • Use the Calibrator only as described in the Users Manual or the protection provided by the Calibrator may be impaired. • Do not apply more than the rated voltage, as marked on the Calibrator, between the terminals, or between any terminal and earth ground (30 V 24 mA max all terminals). • Before each use, verify the Calibrator’s operation by measuring a known voltage. • Follow all equipment safety procedures. • Use the proper terminals, mode, and range for the measuring or sourcing application. • Never touch the probe to a voltage source when the test leads are plugged into the current terminals. • Do not use the Calibrator if it is damaged. Before using the Calibrator, inspect the case. Look for cracks or missing plastic. Pay particular attention to the insulation surrounding the connectors. • Select the proper function and range for the measurement. • Make sure the battery door is closed and latched before operating the Calibrator. • Remove test leads from the Calibrator before opening the battery door. • Inspect the test leads for damaged insulation or exposed metal. Check test lead continuity. Replace damaged test leads before using the Calibrator. • When using the probes, keep your fingers away from the probe contacts. Keep fingers behind the finger guards on the probes. • Connect the common test lead before connecting the live test lead. When disconnecting the test leads, disconnect the live test lead first. • Do not use the Calibrator if it operates abnormally. Protection may be impaired. When in doubt, have the Calibrator serviced. • Do not operate the Calibrator around explosive gas, vapor, or dust. 4 Multifunction Process Calibrator Safety Information • When using a pressure module, make sure the process pressure line is shut off and depressurized before connecting it or disconnecting it from the pressure module. • Use only 4 AA batteries, properly installed in the Calibrator case, to power the Calibrator. • Disconnect test leads before changing to another measure or source function. • When servicing the Calibrator, use only specified replacement parts. • To avoid false readings, which could lead to possible electric shock or personal injury, replace the battery as soon as the battery indicator (M) appears. • Turn off circuit power before connecting the Calibrator mA and COM terminals in the circuit. Place Calibrator in series with the circuit. • Do not allow water into the case. WCaution To avoid possible damage to the Calibrator or to equipment under test: • Disconnect the power and discharge all high-voltage capacitors before testing resistance or continuity. • Use the proper input jacks, function, and range for the measurement or sourcing application. 5 726 Users Manual FREQ TC AC72 Alligator Clips RTD CONFIG SELECTION PULSE EXIT CONFIG 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP 0% Return to Recall 30V MAX ALL SOURCE / MEAS mA+ TL75 Test Lead Set 3W mA- URE V Hz RTD TERMINALS MEASURE TC V mA LOOP 4W COM COM Stackable Test Leads bec01f.eps Figure 1. Standard Equipment 6 Multifunction Process Calibrator Safety Information Symbols Symbols used on the Calibrator and in this manual are explained in Table 2. Table 2. International Symbols T B F AC - Alternating current DC - Direct current M Battery J Earth ground W Risk of danger. Important information. See Manual. Precedes Warning. O X Power ON/OFF f P ) Pressure Conforms to European Union directives Double insulated Hazardous Voltage. Precedes Warning. Conforms to Canadian Standards Association directives. 7 726 Users Manual Getting Acquainted with the Calibrator 1 Input and Output Terminals Figure 2 shows the Calibrator input and output terminals. Table 3 explains their use. 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP 0% Return Return to to Recall Recal 8 2 3 7 6 5 4 bec05f.eps Figure 2. Input/Output Terminals and Connectors 8 Multifunction Process Calibrator Getting Acquainted with the Calibrator Table 3. Input/Output Terminals and Connectors No Name Description A Pressure module connector/serial connector Connects the Calibrator to a pressure module or to a PC for a remote control serial connection. B, C MEASURE V, mA terminals Input terminals for measuring voltage, current, supplying loop power, HART resistance, switch test options. D Thermocouple (TC) input/output Terminal for measuring or simulating thermocouples. This terminal accepts a miniature polarized thermocouple plug with flat, in-line blades spaced 7.9 mm (0.312 in) center to center. E, F SOURCE/ MEASURE V, RTD, Pulse, Hz, Ω terminals Terminals for sourcing or measuring voltage, resistance, pulse, frequency, and RTDs. G, H SOURCE/ MEASURE mA terminals, 3W, 4W Terminals for sourcing and measuring current and performing 3 W and 4 W RTD measurements. HART resistor option in mA mode. 9 726 Users Manual Keys Figure 3 shows the Calibrator keys and Table 4 explains their use. 726 726 PRECISION CALIBRATOR 3 PRECISION CALIBRATOR 20 19 2 6 4 18 ZERO %Error 3 Seconds V mA LOOP 17 OPEN/CLOSE SWITCH TEST HART RTD 1 PULSE EXIT CONFIG CONFIG SELECTION 25% Return to Recal 0% FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION 15 25% ENTER 25% 14 8 100% SAVE RECALL 25% ENTER TRIGGER/STOP TC 16 5 100% SAVE RECALL 7 SWITCH TEST V mA FREQ MEAS SOURCE TC OPEN/CLOSE 3 Seconds HART V mA MEAS SOURCE ZERO %Error V mA LOOP 9 TRIGGER/STOP 13 12 Return to Recallurn to Recal 0% 10 11 bec41f.eps Figure 3. Keys 10 Multifunction Process Calibrator Getting Acquainted with the Calibrator Table 4. Key Functions No A B C Name O Description Turns the power on or off. %Error l ZERO 3 Seconds A Toggles voltage, mA, or Loop Power and % Error measurement functions in the upper display. Selects the pressure measurement function in the upper display. Repeated pushes cycle through the different pressure units. Zeros pressure when held for 3 seconds. D OPEN/CLOSE Q Activates the switch test. E F G C Turns backlight on or off. K Selects frequency sourcing or measurement. P Selects pulse sourcing or measurement. H EXIT CONFIG I J H I K J G Recalls a source value from memory corresponding to 100 % of span and sets it as the source value. Press and hold to store the source value as the 100 % value. Exits Configuration Menu. Increments output by 25 % of span. Decrements output by 25 % of span. Recalls from memory a source value corresponding to 0 % of span and sets it as the source value. Press and hold to store the source value as the 0 % value. Press and hold when powering up to identify the firmware version. The firmware version is shown in the upper display for about 1 second after initialization. 11 726 Users Manual Table 4. Key Functions (cont.) No Name L TRIGGER/STOP M L XW Y Z Return to Recall N S O C P M Q T R V S R T U 12 ENTER HART Description Cycles through : E Slow repeating 0 % - 100 % - 0 % ramp P Fast repeating 0 % - 100 % - 0 % ramp N Repeating 0 % - 100 % - 0 % ramp in 25 % steps Used for the pulse train and totalizer functions. Increases or decreases the source level. Cycles through the 2-, 3-, and 4-wire selections. Moves through the memory locations of Calibrator setups. Moves through the configuration menus. Saves and recalls setups & data. ENTER is used in the configuration menus. Used to enter and navigate the configuration menus. Cycles the Calibrator through MEASURE and SOURCE modes in the lower display. Selects TC (thermocouple) measurement and sourcing function in the lower display. Repeated pushes cycle through the thermocouple types. Toggles between voltage, mA sourcing, or mA simulate functions in the lower display. Inserts a 250 Ω resistor when in mA. Selects RTD (resistance temperature detector) measurement and sourcing function in lower display. Repeated pushes cycle through the RTD types. Selects resistance mode. Selects the pressure measurement and sourcing function. Repeated pushes cycle through the different pressure units. Multifunction Process Calibrator Getting Acquainted with the Calibrator Display Figure 4 shows the elements of a typical display. Loop Indicator Memory Locations for Calibrator Setups HART Mode Indicator Low Battery Symbol Units Display Mode Indicator % Error Indicators Auto Ramp bec07f.eps Figure 4. Elements of a Typical Display 13 726 Users Manual Configuration Menus Use the configuration menus to set or change these parameters of the Calibrator: • Contrast Adjustment • Shut Down Mode • CJC on/off • °C/°F • Frequency/Pulse output voltage • Pulse output frequency • 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE HART resistor on/off TC FREQ RTD PULSE EXIT CONFIG To enter the configuration menus, press C. Press S, to save new configuration. Press G/EXIT CONFIG to exit configuration. CONFIG SELECTION 2 25% ENTER 25% 1 Configuration menus are explained below. Contrast Adjustment 100% SAVE RECALL TRIGGER/STOP Return to to Return Recall Recal 0% 3 To adjust the contrast (see Figure 5): 1. Press C until Contst Adjust appears on the display. 2. Use X and W to adjust the contrast up and down. 3. Press S to save the setting. bec06f.eps Figure 5. Adjusting the Contrast 14 Multifunction Process Calibrator Configuration Menus Shut Down Mode Frequency Pulse Output Voltage The Calibrator comes with a shut down mode set for 30 minutes (displayed for about 1 second when the Calibrator is initially turned on). When shut down mode is enabled, the Calibrator automatically shuts down after the elapsed time from when the last key was pressed. 1. Press C until FREQ OUTPUT V Adjust appears on the display. 2. Use X, W, Y and Z to adjust the frequency pulse output voltage from 1 to 20 V. 3. Press S to save the setting. 1. Press C until SHUT DOWN appears on the display. 2. Use X and W to increase or decrease the time. 3. Press S to save the setting. CJC Cold Junction Compensation (CJC) is a value for the cold end of a thermocouple at the Meter’s end. 1. Press C until SELECT CJC appears on the display. 2. Use Y and Z to select ON or OFF. 3. Press S to save the setting. Pulse Output Frequency 1. Press C until PULSE OUTPUT Hz FREQ Adjust appears on the display. 2. Use X, W, Y and Z to adjust the pulse output frequency from 2 CPM to 15 kHz. 3. Press S to save the setting. Celcius and Fahrenheit (°C and °F) 1. Press C until SELECT UNIT °C (or °F) appears on the display. 2. Use X and W to select °C or °F. 3. Press S to save the setting. 15 726 Users Manual HART Resistor ON/OFF Getting Started 1. Press C until SELECT HART ON or OFF appears on the display. This section details some basic operations of the Calibrator. 2. Use V to toggle ON or OFF. Voltage to Voltage Test 3. Press S to save the setting. To perform a voltage-to-voltage test: Note When HART mode is selected, the 250 Ω resistor is turned on both mA channels. 1. Connect the Calibrator’s voltage output to its voltage input as shown in Figure 6. 2. Press O to turn on the Calibrator. Press l to select dc voltage (upper display). 3. 16 If necessary, press M for SOURCE mode (lower display). The Calibrator is still measuring dc voltage, the active measurements are visible in the upper display. 4. Press V to select dc voltage sourcing. 5. Press Y and Z to select a digit to change. Press X to select 1 V for the output value. Press and hold J to enter 1 V as the 0 % value. 6. Press X to increase the output to 5 V. Press and hold G to enter 5 V as the 100 % value. 7. Press H and I to step between 0 and 100 % in 25 % step increments. Multifunction Process Calibrator Getting Started 726 %Error V mA LOOP PRECISION CALIBRATOR ZERO 3 Seconds OPEN/CLOSE SWITCH TEST HART MEAS V mA FREQ SOURCE TC CONFIG SELECTION RTD PULSE EXIT CONFIG 100% SAVE RECALL 25% ENTER TRIGGER/STOP 25% 0% bec39f.eps Figure 6. Voltage-to-Voltage Test 17 726 Users Manual Using Measure Mode Measuring Electrical Parameters (Upper Display) To measure the current or voltage output of a transmitter, or to measure the output of a 700 Series pressure module, use the upper display and proceed as follows: 1. Press l to select volts or current. LOOP should not be on. 2. Connect the leads as shown in Figure 7. Current Measurement with Loop Power The loop power function activates a 24 V supply in series with the current measuring circuit, allowing you to test a transmitter when it is disconnected from plant wiring. To measure current with loop power: 1. Connect the Calibrator to the transmitter current loop terminals as shown in Figure 8. 2. Press l while the Calibrator is in current measurement mode. LOOP appears and an internal 24 V loop supply turns on. Note When HART resistor mode is selected, the 250 Ω resistor is turned on both mA channels. bec42f.eps Figure 7. Measuring Voltage and Current Output 18 Multifunction Process Calibrator Using Measure Mode 726 PRECISION CALIBRATOR Red ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE TEST DC PWR – ++ – EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% + TRIGGER/STOP Return to Recall – 0% HART Communicator Black bec18f.eps Figure 8. Connections for Supplying Loop Power 19 726 Users Manual Measuring Electrical Parameters (Lower Display) To measure electrical parameters using the lower display, proceed as follows: 1. Connect the Calibrator as shown in Figure 9. 2. If necessary, press M for MEASURE mode (lower display). 3. 726 Press V for dc voltage or current, K for frequency, and Rfor resistance. PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION Red 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recal 0% Black bec43f.eps Figure 9. Measuring Electrical Parameters 20 Multifunction Process Calibrator Using Measure Mode W Caution Measuring Temperature Using Thermocouples The Calibrator supports 13 standard thermocouples. Table 5 summarizes the ranges and characteristics of each. One pin is wider than the other. Do not try to force a miniplug into the wrong polarization. Note If the Calibrator and the thermocouple plug are at different temperatures, wait one minute or more for the connector temperature to stabilize after plugging the miniplug into the TC input/output. To measure temperature using a thermocouple: 1. 2. Select Celsius or Fahrenheit, depending on the desired measurement. Refer to “Configuration Menus” for more information. Attach the thermocouple leads to the appropriate TC miniplug, then to the TC input/output as shown in Figure 10. 3. 4. If necessary, press M for MEASURE mode. Press T for the thermocouple display. Continue pressing this key to select the desired thermocouple type. 21 726 Users Manual Table 5. Thermocouple Types Accepted Type Positive Lead Material Positive Lead (H) Color ANSI* IEC** Negative Lead Material Specified Range (°C) E Chromel Purple Violet Constantan -200 to 950 N Ni-Cr-Si Orange Pink Ni-Si-Mg -200 to 1300 J Iron White Black Constantan -200 to 1200 K Chromel Yellow Green Alumel -200 to 1370 T Copper Blue Brown Constantan -200 to 400 B Platinum (30 % Rhodium) Gray Platinum (6 % Rhodium) 600 to 1800 R Platinum (13 % Rhodium) Black Orange Platinum -20 to 1750 S Platinum (10 % Rhodium) Black Orange Platinum -20 to 1750 L Iron Constantan -200 to 900 U Copper Constantan -200 to 400 C Tungsten 5% Rhenium Tungsten 26% Rhenium 0 to 2316 BP 90.5 % Ni + 9.5 % Cr 56 % Cu + 44 % Ni -200 to 800 80 % W + 20 % Re 0 to 2500 White None GOST Violet or Black XK 95 % W + 5 % Re Red or Pink *American National Standards Institute (ANSI) device negative lead (L) is always red. **International Electrotechnical Commission (IEC) device negative lead (L) is always white. 22 Multifunction Process Calibrator Using Measure Mode 30V MAX ALL TERMINALS SOURCE / MEASURE mA+ 3W MEASURE V Hz RTD mA4W COM TC V mA Process Temperature LOOP TC Warning 30 V maximum to COM TC Miniplug bec12f.eps Figure 10. Measuring Temperature with a Thermocouple 23 726 Users Manual Using Resistance-Temperature Detectors (RTDs) The Calibrator accepts RTD types shown in Table 6. RTDs are characterized by their resistance at 0 °C (32 °F), which is called the “ice point” or R0. The most common R0 is 100 Ω. The Calibrator accepts RTD measurement inputs in two-, three-, or four-wire connections, with the three-wire connection the most common. A four-wire configuration provides the highest measurement precision, and two-wire provides the lowest measurement precision. To measure temperature using an RTD input: 1. If necessary, press M for MEASURE mode. 2. Press R for the RTD display. Continue pressing this key to select the desired RTD type. 3. Press X or W to select a 2-, 3-, or 4- wire connection. 4. Attach the RTD to input terminals as shown in Figure 11. PRT Custom Curves Up to three custom curves can be named and CVD coefficients can be entered through the serial port. Names can be up to six characters. For more information, see the Application Note on the 725/726 CD. 24 Multifunction Process Calibrator Using Measure Mode Table 6. RTD Types Accepted RTD Type Ice Point (R ) 0 Material α Range (°C) Pt100 (3926) 100 Ω Platinum 0.003926 Ω/°C -200 to 630 Pt100 (385) 100 Ω Platinum 0.00385 Ω/°C -200 to 800 Ni120 (672) 120 Ω Nickel 0.00672 Ω/°C -80 to 260 Pt200 (385) 200 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt500 (385) 500 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt1000 (385) 1000 Ω Platinum 0.00385 Ω/°C -200 to 630 Pt100 (3916) 100 Ω Platinum 0.003916 Ω/°C -200 to 630 The IEC standard RTD commonly used in U.S. industrial applications is the Pt100 (385), α = 0.00385 Ω/°C. Pt100 (3916), α = 0.003916 Ω/°C is also designated as JIS curve. Custom RTDs may also be added, see PRT Custom Curves 25 726 Users Manual 30V MAX ALL TERMINALS SOURCE / MEASURE mA+ 2W MEASURE V 3W TC RTD V mA Hz RTD LOOP COM COM mA4W 30V MAX ALL TERMINALS SOURCE / MEASURE mA+ 3W MEASURE V 3W TC V mA Hz RTD LOOP COM COM RTD mA4W 30V MAX ALL TERMINALS SOURCE / MEASURE mA+ 3W 4W MEASURE V TC V mA Hz RTD LOOP COM COM RTD mA4W bec15f.eps Figure 11. Measuring Temperature with an RTD, Measuring 2-, 3-, and 4-Wire Resistance 26 Multifunction Process Calibrator Using Measure Mode Measuring Pressure Many ranges and types of pressure modules are available from Fluke, see “Accessories”. Before using a pressure module, read its instruction sheet. The modules vary in use, media, and accuracy. Gage Differential Low 700P06 High 700P04 PRESSURE MODULE PRESSURE MODULE RANGE 100 PSIG RANGE 15 PSID/G 700 kPa 7 bar 100 kPa 1 bar BURST PRESSURE 300 PSIG BURST PRESSURE 45 PSIG Figure 12 shows the gage and differential modules. Differential modules also work in gage mode by leaving the low fitting open to atmosphere. To measure pressure, attach the appropriate pressure module for the process pressure to be tested, and proceed as follows: W Warning To avoid a violent release of pressure in a pressurized system, shut off the valve and slowly bleed off the pressure before attaching the pressure module to the pressure line. gj11f.eps Figure 12. Gage and Differential Pressure Modules WCaution To avoid mechanically damaging the pressure module: • Never apply more than 10 ft.-lb. (13.5 Nm) of torque between the pressure module fittings, or between the fittings and the body of the module. Always apply appropriate torque between the pressure module fitting and connecting fittings or adapters. 27 726 Users Manual • • 1. 2. 3. Never apply pressure above the rated maximum printed on the pressure module. Only use the pressure module with specified materials. Refer to the printing on the pressure module or the pressure module instruction sheet for the acceptable material compatibility. Connect a pressure module to the Calibrator as shown in Figure 13. The threads on the pressure modules accept standard ¼ NPT pipe fittings. Use the supplied ¼ NPT to ¼ ISO adapter if necessary. Press either A or a. The Calibrator automatically senses which pressure module is attached and sets its range accordingly. Zero the pressure module as described in the module’s Instruction Sheet. Modules vary in zeroing procedures depending on module type, but all require pressing A for 3 seconds. Continue pressing A to change pressure display units to psi, mmHg, inHg, cmH2O@4 °C, cmH2O@20 °C, inH2O@4 °C, inH2O@20 °C, inH2O@60 °F, mbar, 2 bar, kg/cm , or kPa. 28 Zeroing with Absolute Pressure Modules To zero, adjust the Calibrator to read a known pressure. This can be barometric pressure, if it is accurately known, for all but the 700PA3 module. The maximum range of 700PA3 is 5 psi; therefore the reference pressure must be applied with a vacuum pump. An accurate pressure standard can also apply a pressure within range for any absolute pressure module. To adjust the Calibrator reading, proceed as follows: 1. Press A, REF Adjust appears to the right of the pressure reading. 2. Use X to increase or W to decrease the Calibrator reading to equal the reference pressure. 3. Press A again to exit the zeroing procedure. The Calibrator stores and automatically reuses the zero offset correction for one absolute-pressure module so that the module is not rezeroed every time you use it. Multifunction Process Calibrator Using Measure Mode Isolation Valve Gage Module 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION Differential Module 100% SAVE RECALL 25% ENTER 25% L H TRIGGER/STOP Return to Recall Tank 0% bec37f.eps Figure 13. Connections for Measuring Pressure 29 726 Users Manual Using Source Mode Simulating a 4- to 20-mA Transmitter In SOURCE mode, the Calibrator: Simulate is a special mode of operation in which the Calibrator is connected into a loop in place of a transmitter and supplies a known, settable test current. Proceed as follows: • generates calibrated signals for testing and calibrating process instruments • supplies voltages, currents, frequencies, and resistances 1. • simulates the electrical output of RTD and thermocouple temperature sensors 2. If necessary, press M for SOURCE mode. • measures gas pressure from an external source, creating a calibrated pressure source. 3. Press V until both mA and SIM display. Sourcing 4 to 20 mA To select the current sourcing mode, proceed as follows: 1. 2. 3. 30 Connect the test leads in the mA terminals (left column). If necessary, press M for SOURCE mode. Press V for current and enter the desired current by pressing X,W,Y, and Z. 4. Connect the 24 V loop power source as shown in Figure 14. Enter the desired current by pressing X,W,Y, and Z. Multifunction Process Calibrator Using Source Mode 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE Red TC FREQ RTD PULSE EXIT CONFIG + +24 V CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall Loop Power Supply 0% Black Readout or Controller – bec17f.eps Figure 14. Connections for Simulating a 4- to 20-mA Transmitter 31 726 Users Manual Sourcing Other Electrical Parameters 3. Volts, ohms, and frequency are also sourced and shown in the lower display. Press V for dc voltage, or K for frequency, and R for resistance. 4. Enter the desired output value by pressing X and W keys. Press Y and Z to select a different digit to change. To select an electrical sourcing function, proceed as follows: 1. 2. 32 Connect the test leads as shown in Figure 15, depending on the source function. If necessary, press Mfor SOURCE mode. Multifunction Process Calibrator Using Source Mode mA 30V MAX ALL TERMINALS SOURCE / MEASURE + mA + mA Red + TC V mA Hz RTD LOOP COM COM mA- HART Communicator – MEASURE V 3W 4W Black Common V Hz 30V MAX ALL TERMINALS SOURCE / MEASURE mA+ Red + 3W MEASURE V TC V mA Hz RTD LOOP COM COM mA4W – Black Common bec16f.eps Figure 15. Electrical Sourcing Connections 33 726 Users Manual Simulating Thermocouples Connect the Calibrator TC input/output to the instrument under test with the thermocouple wire and the appropriate thermocouple mini-connector (polarized thermocouple plug with flat, in-line blades spaced 7.9 mm [0.312 in] center to center). One pin is wider than the other. W Caution Figure 16 shows this connection. Proceed as follows to simulate a thermocouple: 1. 2. Attach the thermocouple leads to the appropriate TC miniplug, then to the TC input/output as shown in Figure 16. If necessary, press M for SOURCE mode. 3. Press T for the TC display. If desired, continue pressing this key to select the desired thermocouple type. 4. Enter the temperature you want by pressing X and W keys. Press Y and Z to select a different digit to Do not try to force a miniplug into the wrong polarization. edit. 34 Multifunction Process Calibrator Using Source Mode 726 PRECISION CALIBRATOR TEST DC PWR Color depends on type of TC ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST + HART V mA MEAS SOURCE – ++ TC FREQ RTD – PULSE EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall 0% TC Miniplug bec20f.eps Figure 16. Connections for Simulating a Thermocouple 35 726 Users Manual Simulating RTDs 3. Connect the Calibrator to the instrument under test as shown in Figure 17. Proceed as follows to simulate an RTD: Enter the desired temperature by pressing X and W. Press Y and Z to select a different digit to edit. 4. If the 726 display indicates ExI HI, the excitation current from your device under test exceeds the limits of the 726. 1. If necessary, press M for SOURCE mode. 2. Press R for the RTD display. Note Use the 3W and 4W terminals for measurement only, not for simulation. The Calibrator simulates a 2-wire RTD at its front panel. To connect to a 3-wire or 4-wire transmitter, use the stacking cables to provide the extra wires. See Figure 17. 36 Multifunction Process Calibrator Using Source Mode 726 PRECISION CALIBRATOR RED 1 %Error V mA LOOP ZERO 3 Seconds OPEN/CLOSE SWITCH TEST HART MEAS SENSOR TERMINALS V mA FREQ SOURCE TC CONFIG SELECTION RTD 4 3 2 PULSE EXIT CONFIG 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall 0% BLACK bec40f.eps Figure 17. Connections for Simulating 3- and 4-Wire RTD 37 726 Users Manual WCaution Sourcing Pressure The Calibrator sources pressure by measuring pressure supplied by a pump or other sources, and displaying the pressure in the SOURCE field. Figure 18 shows how to connect a pump to a Fluke pressure module which makes it a calibrated source. To avoid mechanically damaging the pressure module: • Never apply more than 10 ft.-lb. (13.5 Nm) of torque between the pressure module fittings, or between the fittings and the body of the module. Always apply appropriate torque between the pressure module fitting and connecting fittings or adapters. • Never apply pressure above the rated maximum printed on the pressure module. • Use the pressure module only with specified materials. Refer to the printing on the pressure module or the pressure module instruction sheet for the acceptable material compatibility. Many ranges and types of pressure modules are available from Fluke, see “Accessories”. Before using a pressure module, read its instruction sheet. The modules vary in use, media, and accuracy. Attach the appropriate pressure module for the process pressure to be tested. Proceed as follows to source pressure: WWarning To avoid a violent release of pressure in a pressurized system, shut off the valve and slowly bleed off the pressure before attaching the pressure module to the pressure line. 38 Multifunction Process Calibrator Using Source Mode 1. Connect a pressure module to the Calibrator as shown in Figure 18. The threads on the pressure modules accept standard ¼ NPT pipe fittings. Use the supplied ¼ NPT to ¼ ISO adapter if necessary. 2. Press U (lower display). The Calibrator automatically senses which pressure module is attached and sets its range accordingly. 3. Zero the pressure module as described in the module’s Instruction Sheet. Modules vary in zeroing procedures depending on module type. 4. Pressurize the pressure line with the pressure source to the desired level as shown on the display. If desired, continue pressing U to change pressure display units to psi, mmHg, inHg, cmH2O@4 °C, cmH2O@20 °C, inH2O@4 °C, 2 inH2O@20 °C, inH2O@60 °C, mbar, bar, kg/cm , or kPa. 39 726 Users Manual Hand Pump 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP Measure mA Source Pressure 24 V Loop Power Enabled Pressure Module OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD To Unit Under Test PULSE EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall 0% 0% bec47f.eps Figure 18. Connections for Sourcing Pressure 40 Multifunction Process Calibrator Setting 0 % and 100 % Output Parameters Setting 0 % and 100 % Output Parameters For current output, the Calibrator assumes that 0 % corresponds to 4 mA and 100 % corresponds to 20 mA. For other output parameters, 0 % and 100 % points must be set before using the step and ramp functions. Proceed as follows: 1. 2. If necessary, press M for SOURCE mode. Select the desired source function and use the arrow keys to enter the value. This example is temperature source using 100 °C and 300 °C values for source. 3. Enter 100 °C then press and hold J to store the value. 4. Enter 300 °C then press and hold G to store the value. This setting can now be used for the following: • Manually stepping an output in 25 % increments. • Switch between the 0 and 100 % span points by momentarily pushing J or G. % Error Functionality Percentage Error is available for every range on the lower display. The calculation is based on a mA percentage deviation from the value measured on the upper display to the value sourced on the lower display 0 % mA and 100 % mA are fixed to 4 and 20 mA. 0 % and 100 % for the lower display are set in source using J and G, refer to “Setting 0% and 100% Output Parameters”. Stepping and Ramping the Output Two additional features are available for adjusting the value of source functions: • Stepping the output manually with the H and I keys, or in automatic mode • Ramping the output Stepping and ramping apply to all functions except pressure, which requires use of an external pressure source. 41 726 Users Manual Manually Stepping the mA Output To exit ramping, press any button. Table 7. mA Step Values To manually step current output: • • Use H or I to step the current up or down in 25 % steps. Step Touch either J to go to 0 %, or G to go to 100 %. Auto Ramping the Output Auto ramping can continuously apply a varying stimulus from the Calibrator to a transmitter, while your hands remain free to test the response of the transmitter. When L is pressed, the Calibrator produces a repeating 0 % - 100 % - 0 % ramp in a choice of three ramp waveforms: • • • 42 E P N 0 % - 100 % - 0 % 40-second smooth ramp 0 % - 100 % - 0 % 15-second smooth ramp 0 % - 100 % - 0 % Stair-step ramp in 25 % steps, pausing 5 seconds at each step. Steps are listed in Table 7. 4 to 20 mA 0% 25 % 50 % 75 % 100 % 4.000 8.000 12.000 16.000 20.000 Storing and Recalling Setups Up to eight settings can be stored in a nonvolatile memory to recall for later use. A low battery condition or a battery change does not jeopardize the stored settings. Store a Setup To store a setup: 1. Create the desired setup. 2. Push S. The right side of the display changes to show SAVE SETUP and SAVE DATA. 3. Push Sto select SAVE SETUP. 4. Push Y or Z to select the desired memory location (at the top of the LCD). 5. Push S to enter the setup. Multifunction Process Calibrator Storing and Recalling Data Recall a Setup Storing and Recalling Data To recall a setup: Up to 40 data samples can be stored in a nonvolatile memory to be recalled for later use. A low battery condition or a battery change does not jeopardize the stored settings. 1. Push S twice. The right side of the display changes to show RECL SETUP and RECALL DATA. 2. Push S again to RECL SETUP. 3. Push Z to select the desired memory location (at the top of the LCD). 4. Push S to recall the setup from the proper memory location. Storing Data To store measurement data, use the following procedure, refer to Figure 19. 1. Take the desired measurement. 2. Push S. The right side of the display changes to show SAVE SETUP and SAVE DATA. 3. Press W to select SAVE DATA. 4. Push S again. The open data point (bottom right of the display) flashes. 5. Use Y and Z to change the data point location (1-8). 6. Push S to store the measurement and return the unit to the measurement mode. Figure 19 shows a reading stored in memory location 3, data point 1. 43 726 Users Manual Memory Locations Save Data Mode Indicator Push Y or Z to select the correct data location (bottom right of display). 6. Push S to recall the data stored in that location. SAVE DATA 7. Push W to return to the same RECALL DATA location to see the next saved measurement, 2 of 5 for example. 1 Pulse Train Source/Read Data Point bec46f.eps Figure 19. SAVE DATA Menu Showing Measurement Memory Location 3, 1 Recall Data To recall data: 1. Push S twice. The right side of the display changes to show RECL SETUP and RECALL DATA. 2. Push W to highlight RECL DATA (bottom right of the display). 3. Push S. 4. Push Z to choose the desired memory location (top of the display). The data saved in that first memory location now appears. There can be different measurements stored (1-5) for each memory location (1-8). 44 5. Pulse Train Source/Read counts input pulses or sources output pulses. Use the configuration menus to set the frequency and output voltage. Refer to “Configuration Menus” earlier in this manual. The number of counts is set through the main display and cannot be changed while sourcing pulses. L works as a trigger/stop key in this mode since ramping or stepping during a pulse train is not relevant. Multifunction Process Calibrator Calibrating a Transmitter If necessary, press M for SOURCE mode. Calibrating a Transmitter 4. Use the measurement (upper display) and source (lower display) modes to calibrate a transmitter. This section applies to all but pressure transmitters. The following example shows how to calibrate a temperature transmitter. Use the following steps to calibrate a transmitter: 5. Set the zero and span parameters by pressing X and W. Enter these parameters by pressing and holding J and G. For more information on setting parameters, see “Setting 0 % and 100 % Output Parameters”. 6. Perform test checks at 0-25-50-75-100 % points by pressing H or I. Adjust the transmitter as necessary. 1. Connect the Calibrator to the instrument under test as shown in Figure 20. 2. Press l for current (upper display). If required, press l again to activate loop power. 3. Press T (lower display). If desired, continue pressing this key to select the desired thermocouple type. Note When HART resistor mode is selected, the 250 Ω resistor is turned on both mA channels. 45 726 Users Manual 726 PRECISION CALIBRATOR Red ZERO %Error 3 Seconds V mA LOOP OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE TEST DC PWR – ++ – EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER + 25% TRIGGER/STOP Return to Recall – 0% HART Communicator Black bec44f.eps Figure 20. Calibrating a Thermocouple Transmitter 46 Multifunction Process Calibrator Calibrating a Pressure Transmitter Calibrating a Pressure Transmitter 4. If necessary, press M for SOURCE mode. The following steps explain calibrating a pressure transmitter. 5. Zero the pressure module. 6. Perform checks at 0 % and 100 % of span and adjust the transmitter as necessary. 1. Connect the Calibrator to the instrument under test as shown in Figure 21. 2. Press l for current (upper display). If required, press l again to activate loop power. 3. Press U (lower display). Note When HART resistor mode is selected, the 250 Ω resistor is turned on both mA channels. 47 726 Users Manual Hand Pump S I G N A L 726 PRECISION CALIBRATOR ZERO %Error 3 Seconds V mA LOOP Measure mA Source Pressure 24 V Loop Power Enabled + – T E S T Pressure Module OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall 0% 0% Red HART Communicator Black bec34f.eps Figure 21. Calibrating a Pressure-to-Current (P/I) Transmitter 48 Multifunction Process Calibrator Calibrating an I/P Device Calibrating an I/P Device 3. The following steps explain how to calibrate a device that controls pressure. Proceed as follows: 5. 1. Connect the test leads to the instrument under test as shown in Figure 22. The connections simulate a current-to-pressure transmitter and measures the corresponding output pressure. 2. Press A (upper display). 4. Press V for sourcing current (lower display). If necessary, press M for SOURCE mode. Enter the desired current by pressing X and W. Press Y and Z to select different digits. 49 726 Users Manual S I G N A L 726 PRECISION CALIBRATOR Measure Pressure Source mA + – T E S T ZERO %Error 3 Seconds V mA LOOP Pressure Module OPEN/CLOSE SWITCH TEST HART V mA MEAS SOURCE TC FREQ RTD PULSE EXIT CONFIG CONFIG SELECTION 100% SAVE RECALL 25% ENTER 25% TRIGGER/STOP Return to Recall 0% 0% Red HART Communicator Black bec28f.eps Figure 22. Calibrating a Current-to-Pressure (I/P) Transmitter 50 Multifunction Process Calibrator Pressure Switch Test Pressure Switch Test Note This example uses a normally-closed switch. The procedure is the same for an open switch but the display reads OPEN instead of CLOSE. To perform a switch test: 1. Connect the Calibrator mA and COM terminals to the switch using the pressure switch terminals and connect the pump to the pressure switch. The polarity of the terminals does not matter. 2. Make sure the vent on the pump is open and, if necessary, zero the Calibrator. Close the vent after zeroing the Calibrator. 3. Press Q to enter switch-test mode. The upper display indicates the applied pressure. CLOSE is displayed to the right of the pressure reading to indicate closed contacts. 4. OPEN displays once the switch is open. Slowly bleed the pump until the pressure switch closes. RECALL appears on the display. 5. Press Q to read the pressure values for when the switch opened, for when it closed, and for the deadband. 6. Hold Q for three seconds to restart the test. Press A OR U to exit the switch test. Testing an Output Device Use the source functions to test and calibrate actuators, recording, and indicating devices. Proceed as follows: 1. Connect the test leads to the instrument under test as shown in Figure 23. 2. Press V for current or dc voltage, or K for frequency or resistance (lower display). 3. If necessary, press M for SOURCE mode. Slowly apply pressure with the pump until the switch opens. Note Pressure the device slowly to ensure accurate readings. Run the test several times to confirm repeatability. 51 726 Users Manual Remote Control Commands The Calibrator may be remotely controlled from a PC running a terminal emulator program. The remote control commands give access to all capabilities of the Calibrator with the exception of pressure measurement. See the Fluke Web Site for the 726 Remote Programming application note at www.fluke.com/processtools HART Functionality The Calibrator has a user-selectable 250 Ω HART to facilitate use with HART communication devices. The resistor can be switched in or out using config selection menus. Use a HART communicator when measuring mA with loop power or sourcing mA. bec25f.eps Figure 23. Calibrating a Chart Recorder 52 Multifunction Process Calibrator Maintenance Maintenance Replacing the Batteries XWWarning To avoid false readings, which could lead to possible electric shock or personal injury, replace the batteries as soon as the battery indicator (M) appears. Figure 24 shows you how to replace the batteries. Battery and Compartment bec38f.eps Figure 24. Replacing the Batteries 53 726 Users Manual Cleaning the Calibrator WCaution To avoid damaging the plastic lens and case, do not use solvents or abrasive cleansers. Clean the Calibrator and pressure modules with a soft cloth dampened with water or water and mild soap. Service Center Calibration or Repair Calibration, repairs, or servicing not covered in this manual should be performed only by qualified service personnel. If the Calibrator fails, check the batteries first, and replace them if needed. To locate an authorized service center, refer to “Contacting Fluke” at the beginning of the manual. Replacement Parts Table 8 lists the part number of each replaceable part. Refer to Figure 25. Table 8. Replacement Parts Item 1 2 3 4 5 6 7 8 9 10 11 54 Description AA alkaline batteries Case screws Battery door Accessory mount Tilt stand Battery door 1/4-turn fasteners TL75 series test leads Test lead, red Test lead, black 726 Product Overview Manual AC72 alligator clip, red AC72 alligator clip, black 725/726 CD ROM, contains User Manual PN Qty. 376756 832246 664250 658424 659026 948609 4 4 1 1 1 2 855742 688051 688066 2441588 1 1 1 1 1670641 1670652 1549615 1 1 1 Multifunction Process Calibrator Maintenance 1 2 10 3 4 6 5 9 7 11 8 bec45f.eps Figure 25. Replacement Parts 55 726 Users Manual Accessories External Fluke Pressure Module Compatibility For more information about these accessories, contact your Fluke representative. Fluke Pressure Module Compatibility is listed in Table 9. Pressure Modules and Fluke model numbers are listed in Table 10. Contact your Fluke representative about new pressure modules not listed here. • 700HTP 0 to 10,000 PSI Pump • 700PTP -11.6 to 360 PSI Pump • 700TC1 and 700TC2 Thermocouple Mini-plug Kits The output of Fluke 700P pressure modules can cause the 726’s 5 digit display to overflow, or else produce values that are too low to be read if inappropriate units are selected. This is prevented by displaying OL on the display per the following table. Table 9. Fluke Pressure Module Compatibility Pressure Unit Psi In. H20 cm. H20 Bar Mbar KPa In.Hg. mm. Hg 2 Kg/cm 56 Module Compatibility Available on all pressure ranges All ranges through 3000 psi All ranges through 1000 psi 15 psi and above All ranges through 1000 psi Available on all pressure ranges Available on all pressure ranges All ranges through 1000 psi 15 psi and above Multifunction Process Calibrator Accessories Table 10. Pressure Modules Fluke Model Number Range Type and Media Fluke-700P00 0 to 1” H2O differential, dry Fluke-700P01 0 to 10” H2O differential, dry Fluke-700P02 0 to 1 psi differential, dry Fluke-700P22 0 to 1 psi differential, wet Fluke-700P03 0 to 5 psi differential, dry Fluke-700P23 0 to 5 psi differential, wet Fluke-700P04 0 to 15 psi differential, dry Fluke-700P24 0 to 15 psi differential, wet Fluke-700P05 0 to 30 psi gage, wet Fluke-700P06 0 to 100 psi gage, wet Fluke-700P27 0 to 300 psi gage, wet Fluke-700P07 0 to 500 psi gage, wet Fluke-700P08 0 to 1,000 psi gage, wet Fluke-700P09 0 to 1,500 psi gage, wet 57 726 Users Manual Table 10. Pressure Modules (cont.) Fluke Model Number 58 Range Type and Media Fluke-700P29 0 to 3,000 psi gage, wet Fluke-700P30 0 to 5,000 psi gage, wet Fluke-700P31 0 to 10,000 psi gage, wet Fluke-700PA3 0 to 5 psi absolute, wet Fluke-700PA4 0 to 15 psi absolute, wet Fluke-700PA5 0 to 30 psi absolute, wet Fluke-700PA6 0 to 100 psi absolute, wet Fluke-700PV3 0 to -5 psi vacuum, dry Fluke-700PV4 0 to -15 psi vacuum, dry Fluke-700PD2 ±1 psi dual range, dry Fluke-700PD3 ±5 psi dual range, dry Fluke-700PD4 ±15 psi dual range, dry Fluke-700PD5 −15/+30 psi dual range, wet Fluke-700PD6 −15/+100 psi dual range, wet Fluke-700PD7 −15/+200 psi dual range, wet Multifunction Process Calibrator Specifications Specifications Specifications are based on a one year calibration cycle and apply from +18 °C to +28 °C unless stated otherwise. All specifications assume a five-minute warmup period. DC Voltage Measurement and Source Range 30 V (upper display) 20 V (lower display) 20 V (Source) 100 mV (Source) 90 mV (Read) Minimum 0.000 0.000 0.000 0.000 0.000 Maximum 30.000 20.000 20.000 100.000 90.000 Accuracy, (% of Reading + Floor) 0.010 % + 2 mV 0.010 % + 2 mV 0.010 % + 2 mV 0.010 % + 10 µV 0.010 % + 10 µV Maximum current output in voltage ranges is 1 mA with an output impedance of ≤ 1 Ω DC mA Measurement and Source Range Minimum Maximum Accuracy, (% of Reading + Floor) mA Read (Upper Display) 0.000 24.000 0.010 % + 2 µA mA Read (Lower Display) 0.000 24.000 0.010 % + 2 µA mA Source 0.000 24.000 0.010 % + 2 µA Maximum load on, mA source is 1 ke. With the HART resistor on, maximum load is 750 Ω. Voltage input range on simulate mode is 5 to 30 V 59 726 Users Manual Ohms Measurement Ohms Range Minimum Maximum Accuracy (% of Reading + Floor) Ohms Read (low) 0.00 400.00 0.015 % + 0.05 Ω Ohms Read (high) 401.0 4000.0 0.015 % + 0.5 Ω Ohms Source Ohms Range Ohms Source (low) Ohms Source (high) Minimum Maximum Excitation Current from Measurement Device Accuracy (% of Reading + Floor) 5.0 400.0 0.1 to 0.5 mA 0.015 % + 0.1 Ω 5.0 400.0 0.5 to 3 mA 0.015 % + 0.05 Ω 400 1500 0.05 to 0.8 mA 0.015 % + 0.5 Ω 1500 4000 0.05 to 0.4 mA 0.015 % + 0.5 Ω Unit is compatible with smart transmitters and PLCs. Frequency response is ≤ 5 mS Frequency Measurement Range CPM Read Hz Read KHz Read 60 Minimum 2.0 1.0 1.00 Maximum 1000.0 1000.0 15.00 Accuracy (% of Reading + Floor) 0.05 % + 0.1 CPM 0.05 % + 0.1 Hz 0.05 % + 0.01 KHz Multifunction Process Calibrator Specifications Frequency Source Range Minimum CPM Source Hz Source KHz Source 2.0 1.0 1.0 10.00 Maximum Accuracy 1000 1000.0 10.00 15.00 0.05 % 0.05 % 0.25 % 0.50 % Temperature, Thermocouples Type J K T E R Minimum -210 0.0 800 -200 0.0 1000 -250 0.0 -250 -100 -20 0.0 Maximum 0.0 800 1200 0.0 1000 1372 0.0 400 -100 1000 0.0 1767 CJC ON Accuracy CJC OFF Accuracy 0.6 0.4 0.5 0.8 0.5 0.7 0.8 0.4 0.8 0.4 2.0 1.4 0.4 0.2 0.3 0.6 0.3 0.5 0.6 0.2 0.6 0.4 1.8 1.2 CJC error outside of 23 ± 5 °C is 0.05 °C / °C 61 726 Users Manual Type S B C L U N XK BP Minimum -20 0.0 600 800 1000 0.0 1000 -200 0.0 -200 0.0 -200 0.0 -200 0.0 800 Maximum 0.0 1767 800 1000 1820 1000 2316 0.0 900 0.0 600 0.0 1300 800 800 2500 CJC ON Accuracy CJC OFF Accuracy 2.0 1.4 1.4 1.5 1.7 0.8 2.5 0.45 0.4 0.7 0.45 1.0 0.6 0.4 1.1 2.3 Range 1.8 1.2 1.2 1.3 1.5 0.6 2.3 0.25 0.2 0.5 0.25 0.8 0.4 0.2 0.9 2.1 Accuracy 0.015 % + 10 µV (% of Reading + Floor) 0.015 % + 10 µV (% of Reading + Floor) Thermocouple in mV read -10 °C to 75 °C Thermocouple in mV source -10 °C to 75 °C Maximum current output in voltage ranges is 1 mA with an output impedance of ≤ 1 e 62 Multifunction Process Calibrator Specifications RTD Accuracy (Read and Source) (ITS-90) Range Ni120 (672) Pt100 (385) Pt100 (3926) Pt100 (3916) Pt200 (385) Pt500 (385) Pt1000 (385) CU10 Minimum -80.00 -200.00 100.00 300.00 600.00 -200.00 100.00 300.00 -200.00 100.00 300.00 -200.00 100.00 300.00 -200.00 100.00 300.00 -200.00 100.00 300.00 -10.00 Maximum Accuracy 260.00 100.00 300.00 600.00 800.00 100.00 300.00 630.00 100.00 300.00 630.00 100.00 300.00 630.00 100.00 300.00 630.00 100.00 300.00 630.00 250.00 0.15 0.15 0.25 0.35 0.45 0.15 0.25 0.35 0.15 0.25 0.35 0.75 0.85 0.95 0.35 0.45 0.55 0.15 0.25 0.35 1.8 Notes: Read Accuracy is based on 4-wire input. For 3-wire input, add ± 0.05 e assuming all three RTD leads are matched. Source Accuracy is based on 0.5 to 3.0 mA excitation current (0.1 mA for pt1000 range) 63 726 Users Manual Loop Power Supply Voltage: 24 V Maximum current: 22 mA Short circuit protected. Pulse Read and Pulse Source Pulse Source Min Max 10,000 1 Accuracy 1 Count Frequency 2 CPM to 10 kHz 100,000 Read Pressure Measurement Range Determined by pressure module 64 Resolution 5 digits Accuracy Determined by pressure module Units Mode psi, inH2O@4 °C, inH2O@20 °C, kPa, cm H2O@4 °C, cmH2O@20 °C, bar, mbar, kg/cm2, mmHg, inHg Pushing A for 3 seconds stores present pressure value as an offset and subtracts it from the displayed value Multifunction Process Calibrator Specifications General Specifications Operating temperature -10 °C to 50 °C Storage temperature - 20 °C to 70 °C Stability ± 0.005 % of range/°C outside of 23 ± 5 °C 3000 meters above mean sea level Operating altitude Relative Humidity (% RH operating without condensation) Vibration Safety Power requirements Protection Class Size Weight 90 % (10 to 30 °C) 75 % (30 to 40 °C) 45 % (40 to 50 °C) 35 % (50 to 55 °C) uncontrolled < 10 °C Random, 2 g, 5 to 500 Hz EN50082-1:1992 and EN55022: 1994 Class B Criteria A or B CSA C22.2 No 1010.1:1992 4 AA alkaline batteries Pollution Degree II 96 x 200 x 47 mm. (3.75 x 7.9 x 1.86 in) 650 gm (1 lb, 7 oz) 65 726 Users Manual 66 Index —0— —B— —D— 0% output parameter, setting, 41 Battery, replacing, 53 —1— —C— 100% output parameter, setting, 41 Calibration, 54 Celcius and Fahrenheit, 15 Cleaning calibrator, 54 Cold Junction Compensation (CJC), 15 Commands Remote Control, 52 configuration menus, 14 Connections for pressure sourcing, 39 Contact Information, 1 Data Recall, 44 display contrast adjustment, 14 Display, 13 —4— 4 to 20 mA transmitter simulating, 30 —A— Accessories, 56 Auto ramping output, 42 —E— Electrical parameters measurement, 20 sourcing, 32 —F— frequency output voltage, 15 67 726 Users Manual —G— —M— Getting started, 16 Measure functions, summary (table), 2 Measure mode, 18 Measuring pressure, 27 temperature with RTDs, 24 temperature with thermocouples, 21 menus configuration, 14 —H— HART configuration menu, 16 —I— I/P device, calibrating, 49 Input terminals, 8 Input/output terminals and connectors (table), 9 —O— —K— —P— Key functions (table), 11 Keys, 10 Parts list, 54 Percentage Error, 41 Pressure Measurement, 27 Sourcing, 38 pressure modules compatibility, 56 Pressure Modules Compatibility, 56 Pressure modules available, 56 —L— loop power, 18 Loop power simulating, 30 68 Output device, testing, 51 Output terminals, 8 Pressure modules, zeroing, 28 Pressure Switch Test, 51 Pressure transmitter, calibrating, 47 Pulse Train Source/Read, 44 —R— ramping, 41 Recalling setups, 42, 43 Remote control commands, 52 Repair, 54 Resistance-Temperature Detectors accepted types (table), 25 RTD simulating, 36 RTD measuring, 24 types, 24 —S— Safety information, 3 Saving Measurements, 43 Servicing, 54 Setup Recall, 43 recalling, 42, 43 Index (continued) storing, 42, 43 shut down mode, 15 Thermocouple, 34 Simulating loop power, 30 RTD, 36 thermocouples, 34 Source functions, summary (table), 2 Source mode, 30 Sourcing 4 to 20 mA, 30 electrical parameters, 32 pressure, 38 thermocouples, 34 Specifications, 59 Standard equipment, 3 stepping, 41 Stepping output, 42 Storing setups, 42, 43 symbols, 7 input, 8 output, 8 Thermocouple measuring, 21 measuring temperature, 21 sourcing, 34 types, 21 thermocouples accepted types, 22 Transmitter 4 to 20 mA, simulating, 30 Transmitter, calibrating, 45 —V— voltage to voltage test, 16 —Z— Zeroing pressure modules, 28 —T— Temperature measuring with RTD, 24 measuring with thermocouple, 21 Terminals 69 726 Users Manual 70
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