Pasco Specialty And Mfg Temperature Array Ps 2157 Users Manual 012 08867A
2015-02-06
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I n s tr uc t io n Ma n ua l 012- 08867A Temperature Array PS-2157 1 4 3 2 Included Equipment Part Number 1. Temperature Array PS-2157 2. Eight-probe Bundle 514-09083 3. Fast Response Temperature Probes (qty. 3) PS-2135 (3-pack) 4. Adhesive Patches (qty. 10) PS-2525 (100-pack) Compatible Temperature Probes Fast-response Temperature Probes PS-2135 (3-pack) Stainless Steel Temperature Probe PS-2153 Skin/Surface Temperature Probe PS-2131 10 kΩ thermistors embedded in other PASCO devices see PASCO catalog or www.pasco.com Compatible PASPORT Interfaces Xplorer GLX PS-2002 Xplorer PS-2000 Power Link PS-2001 USB Link PS-2100 Introduction The PASPORT Temperature Array works with up to eight temperature probes and a PASPORT interface to collect multiple streams of temperature data at up to 200 samples per second per channel. ® Te mp e r at ur e A r r ay Setup Separate temperature probes (such as the three included fast-response probes) can be connected to the individual input ports, numbered 1 through 8 (right); or the special eight-probe bundle (below) can be connected to the multiport (below right). Three probes connected to individual ports Eight-probe bundle connected to multiport Eight-probe bundle Each of the probes in the eight-probe bundle is identified by a colored band. The colors correspond to the Temperature Array’s data channel numbers as shown in the table (right). When measuring the surface temperature of a person or object, use the included adhesive patches to attach the probes. Other PASCO devices containing embedded 10 kΩ thermistors (such as the Heat Conduction Apparatus, TD-8513) can be connected to the individual ports or the multiport of the Temperature Array using the cables included with those devices. Setup Hardware Setup The following three steps can be performed in any order. 1. Connect the eight-probe bundle to the multiport or connect up to eight separate temperature probes to the individual input ports. Color Data Channel Number Brown 1 Red 2 Orange 3 Yellow 4 Green 5 Blue 6 Violet 7 Gray 8 The color scheme is similar to the one commonly used to identify resistor values. Probes can be connected to the individual ports in any order (you don’t have to start with port 1), and any of the ports can be left unconnected. Do not use the individual ports and the multiport at the same time. 2. Connect the cable of the Temperature Array to a PASPORT interface. 3. If you will be using a computer, connect the PASPORT interface to the computer’s USB port. DataStudio Setup If you will be using the Temperature Array with a computer, install DataStudio version 1.9.5 first. 2 1. When you connect the Temperature Array to the computer through a PASPORT interface, the PASPortal window will launch automatically (if DataStudio is not already running. 2. Double click Temperature Array.ds to open the Temperature Array’s configured file in DataStudio. double click ® Mo d el No . P S - 21 5 7 S e tu p To open to configuration file directly, navigate to the folder c:\Program Files\DataStudio\eLabs\Sensors\ (Windows) or HD:Aplications:DataStudio:eLabs:Sensors (Mac). 3. The configuration file contains a run of sample data showing the data color corresponding to each data channel. To delete the sample data before collecting your own data, press Alt+Minus (Windows) or +Minus (Mac). 4. Click to begin data collection. To view and change the sample rate, units of measure, and other sensor properties, click . DataStudio configuration file, Temperature Array.ds Xplorer and Xplorer GLX Setup If you will be using an Xplorer or Xplorer GLX in logging mode (not connected to a computer), connect the Temperature Array to the Xplorer or Xplorer GLX and press to begin data collection. Multiple-measurement Alignment When you are using multiple temperature probes, you may find that their reading differ slightly when they are measuring the same thing. In the example illustrated (right), measurements from eight probes in the same container of water vary by about 0.3 °C. The multiple-measurement alignment procedure adjusts the calibrations of the probes so they agree more closely. The procedure described here for DataStudio can also be performed on the Xplorer GLX. See the Xplorer GLX Users’ Guide for detailed instructions. 1. Click to open the Experiment Setup window. Click to open the calibration dialog box. 2. From the Sensor field, select the Temperature Array. 3. Select the “Calibrate all similar measurements simultaneously” option. 4. Place all of the probes in a container of room-temperature water. (If you are calibrating thermistors embedded in a device, allow the thermistors to come to equilibrium at room temperature.) 5. Observe the Present Sensor Measurement and wait until it has stabilized. 6. From the Calibration Type menu, select 1 Point (Adjust Offset Only). 7. Click the Read From Sensor button for Point 1. 8. Click OK to accept the new calibration; or click Cancel to revert to the previous or default calibration. ® 3 Te mp e r at ur e A r r ay S peci ficati ons Two-point calibration Though it is usually not necessary, a two-point calibration can be performed on a single probe, or on all probes simultaneously, to make the measurements more accurate. For step-by-step instructions refer to the documentation for DataStudio version 1.9.5, the Xplorer, or the Xplorer GLX. Oversampling The degree of oversampling that takes place within the Temperature Array depends on the sample rate and the number of connected probes. To maximize the oversampling, set the sample rate as low as possible and disconnect any unused probes. In many cases, increased oversampling reduces noise, produces smoother data, and improves the measurement resolution. This effect is especially noticeable when very small temperature changes are measured. Measurement Repetition At high sample rates, the Temperature Array may occasionally repeat a measured value in order to maintain the flow of data without exceeding its processing capacity. The maximum sample rate at which this does not occur depends on the number of connected probes, as shown in the table (right). At sample rates above these thresholds, you may notice that a rapidly changing temperature graph has occasional plateaus where the sampled temperature remains constant for two or more points in a row. To reduce the effect of measurement repetition, use the smooth(n, x) function in DataStudio’s calculator. (For information about the smooth function, open the Help menu in DataStudio and search for “smooth.”) Maximum Sample Rate without Measurement Repetition Number of Probes Rate (Hz) 1 200 2 or 3 100 4 to 8 50 Specifications 4 Measurement Range -35 °C to 135 °C (probe dependent) Maximum Range of Fast-response Probes and Eight-probe Bundle -35 °C to 70 °C Accuracy ±0.5 °C Resolution 0.0025 °C Repeatability 0.01 °C Maximum Sample Rate 200 Hz per Temperature Sensor Unit Options °C, °F, K ® Mo d el No . P S - 21 5 7 Te c hn i c al Su p po r t Technical Support For assistance with any PASCO product, contact PASCO at: Address: PASCO scientific 10101 Foothills Blvd. Roseville, CA 95747-7100 Phone: 916-786-3800 (worldwide) 800-772-8700 (U.S.) Fax: (916) 786-3292 Web: www.pasco.com Email: support@pasco.com Limited Warranty For a description of the product warranty, see the PASCO catalog. Copyright The PASCO scientific 012-08867A Temperature Array Instruction Manual is copyrighted with all rights reserved. Permission is granted to non-profit educational institutions for reproduction of any part of this manual, providing the reproductions are used only in their laboratories and classrooms, and are not sold for profit. Reproduction under any other circumstances, without the written consent of PASCO scientific, is prohibited. Trademarks PASCO, PASCO scientific, DataStudio, PASPORT, Xplorer, and Xplorer GLX are trademarks or registered trademarks of PASCO scientific, in the United States and/or in other countries. For more information visit www.pasco.com/legal. Windows is a registered trademark of Microsoft Corporation in the United States and/or other countries. Mac is trademark of Apple Computer, Inc., registered in the U.S. and other countries. ® 5
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