Geotech Geocontrol 2 Logic Unit Installation And Operation Manual
User Manual: Pdf Geotech Geocontrol 2 Logic Unit
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Geotech Geocontrol 2 Logic Unit Installation and Operation Manual Rev. 4/24/2013 Part # 11150170 Table of Contents Section 1: System Description …………………………………………..…….. Section 2: System Installation …………………………………………….……. Section 3: System Operation ………………………………..………………… Section 4: System Maintenance ………………………………………….…… Section 5: System Troubleshooting ………………………….………………... Section 6: System Specifications ………………………………………….….. Section 7: System Schematics ………………………..………………………. Section 8: Replacement Parts List …………………….…….………………… Warranty and Repair ……..…………………….……………..………………… 1 3 4 6 8 9 10 11 13 16 DOCUMENTATION CONVENTIONS This uses the following conventions to present information: An exclamation point icon indicates a WARNING of a situation or condition that could lead to personal injury or death. You should not proceed until you read and thoroughly understand the WARNING message. WARNING A raised hand icon indicates CAUTION information that relates to a situation or condition that could lead to equipment malfunction or damage. You should not proceed until you read and thoroughly understand the CAUTION message. CAUTION A note icon indicates NOTE information. Notes provide additional or supplementary information about an activity or concept. NOTE 2 Section 1: System Description Function and Theory Geotech's Geocontrol 2 utilizes advanced electronic logic to control both high rate purging and gentle low flow sampling. Simple to use, accurate microprocessor controlled on/off timers are utilized to recreate expert techniques for low-flow sampling. The Geocontrol 2 high-pressure solenoid activated valve delivers even in the deepest sampling applications. The Geocontrol 2 can be used with any bladder pump system with the use of simple quick-disconnect adapters. 3 Section 2: System Installation READ BEFORE PROCEEDING ANY FURTHER THE GEOCONTROL 2 REQUIRES DRY MOISTURE FREE AIR. TO DISREGARD WILL INCREASE THE LIKELIHOOD OF UNNECESSARY MAINTENANCE! Determine your power source, either 115 VAC or 12 VDC. Selecting Air Source The following explanation is based on the Geotech Bladder Pump Model GEO1.66SS36 with .170 (4.3mm) ID air supply tubing. To determine the required capacity of the air source used, calculate the air consumption as follows. With 100 ft. of air line tubing in or out of the well, the air consumption is 125 cubic inches per cycle, with 6 cycles per minute (average). Example: For 100 ft. (30.5m) of tubing you will need 125 cu. in. (2L) x 6 per min. which equals 750 cu. in. (12L) / min. or 45,000 cu. in. (737L) / hr. For each additional 100 ft. add 59 cu. in. (or 1 liter for every additional 30m). If you plan to use an air compressor, we advise that you use one with a reserve tank to insure proper air supply to the pump. If you plan to use a Nitrogen Tank, see figure 2 for Nitrogen Tank Volume vs. Bladder Pump consumption. Determining PSI Determine the air pressure needed to operate the Bladder Pump based on the length of the air supply line to the pump (well depth). Use the simplified formula of (1/2 PSI per foot) + 10 PSI for friction, or (.1 bar per meter) + .7 bar. Example: For a pump 100 ft. away from the air source, use 100 ft. divided by 2 then add 10 PSI, this equals 60 PSI (100' / 2 + 10 = 60 PSI). In metric: For a pump 30m away from the air source, use 30m divided by 2 then add .7 bar, this equals 15.7 bar (30m / 2 + .7 = 15.7 bar). The additional 10 PSI (.7 bar) is to account for the pump itself and friction loss along the air line tubing. Where the length of the air line to the Bladder Pump is 50 ft. (15m) or less, an additional 10 PSI (.7 bar) need not be added. 4 Figure 2-1 – Nitrogen tank volume vs. bladder pump consumption 5 Section 3: System Operation To determine minimum operating pressures for the specific Bladder Pump model you are using, consult Pumps Specifications. Typically the minimum operating pressure will be 5 PSI (.35 bar) above static head. Example: Bladder Pump depth is 50 feet. 50 / 2 = 25 + 5 = 30 PSI. In metric: Bladder Pump depth is 15m. 15m / 2 = 7.5 + .35 bar = 7.85 bar (The previous formula is not absolute and is meant to provide baseline information.) At the wellhead, connect the air supply line from the air source (compressor, bottle, etc.) to the quick disconnect marked AIR INLET (see Section 2 on selecting an air source). Next, connect the air supply line hose whip to the air line at the well cap and the quick disconnect marked AIR OUTPUT. Adjust the air source regulator to the appropriate psi, (see Section 2 on determining psi). Switch the toggle from ON/OFF, depending on power supply selected. Adjusting Cycle Timers Adjust Charge Time knob to approx. 5 seconds, adjust Exhaust Time knob to approximately 15 seconds. A 15 second exhaust cycle will be enough time to fill bladder at approximately 100 ft. (30.5m). The charge cycle can be adjusted by watching the sample line. When a steady stream of water stops, set the charge cycle back about one second. NOTE Charge times will vary depending on the depth of well. The following guidelines are based on a 0.5” ID tube: - Standard Sampling: 0-30 second charge time (up to 172 ft.) - *Deep Well Sampling: 0-60 second charge time (up to 345 ft.) - *Max. Depth Sampling: 0-120 second charge time (up to 690 ft.) DO NOT OVER CHARGE this will cause excessive bladder wear. Once the charge cycle is adjusted, measure the volume of the sample. Adjust the exhaust cycle back by one second at a time. Let the pump cycle a few times after each modification before adjusting again. Measure the volume of sample to make sure it is not decreasing. Continue to reduce the exhaust time back until the sample volume decreases. A decrease in sample volume indicates that the exhaust cycle is not long enough for the pump bladder to fill to its maximum. Add one second to the exhaust cycle at this point to make sure the maximum volume in the bladder is achieved. The Geocontrol 2 has a red indicator LED labeled POWER. When the red LED is constant, the controller is in CHARGE TIME. When the red LED is blinking the controller is in EXHAUST TIME. * Custom timer range 6 Low Flow Sampling The Geocontrol 2 includes a flow control valve, marked EXHAUST FLOW. The flow control valve ensures a true low flow of the sample by controlling the speed with which the bladder fills, regardless of the depth of the pump. Tightening the control knob clockwise will reduce the flow of the exhaust and slow the filling of the bladder. Turning the control knob counter-clockwise will increase the flow of exhaust thus increasing the speed of the flow of water into the bladder. Figure 3-1 – Cycles vs. Depth 7 Section 4: System Maintenance The Geocontrol 2 does not require a regular maintenance program. As stated in installation and operation, this unit requires dry, moisture-free air. To disregard will increase the likelihood of unnecessary maintenance. 8 Section 5: System Troubleshooting Problem: Unit will not turn on. Solution: Check power source and cables for damage. If using DC, verify that you have a 12 VDC power source. If on AC, verify that you are getting a consistent 115 VAC current. Problem: Unit turns on but cycles rapidly, no pumping. Solution: Charge and exhaust times not set correctly. Check and adjust charge and exhaust cycle times (i.e., if charge time too long and exhaust time too short, or charge time too short). Review Section 3 for correct cycle times. Problem: Turns on, cycles correctly but does not pump water. Solutions: Check for tubing kinks. Check pressure on gauge, may be too low. Calculate based on .5 PSI per foot (.1 bar per meter) of head and add 10 PSI (.7 bar) for friction. If psi is good, check your exhaust flow, may be completely shut, try turning three times to the left. (Exhaust is the brass valve). Problem: Unit was working but quit cycling. Solutions: Check power source. If power source is good, check air source. Air source is good - have you been using clean dry air? If not contact Geotech at 1-800-833-7958 9 Section 6: System Specifications Model: Geocontrol 2 Maximum Ratings Input DC Power Source DC Current Draw DC Input Surge Current Input AC Power Source AC Current Draw AC Input Surge Current Input AC Line Frequency Maximum Power 0.5-13.8 VDC 0.5 Amps <50 Amps 105-130 VAC 0.1 Amps <15 Amps 45-65 Hz 15 Watts Performance Input Air Pressure Operating Depth * On Timer Range * Off Timer Range Timer Resolution Timer Accuracy 300 PSI (20.5 bar) 0-690 Feet (0-210m) 0.125 to 30 Seconds 0.125 to 30 Seconds 0.125 Seconds ±0.125 Seconds Environmental Operating Temperature Range Storage Temperature Range Position Effect Vibration Shock EMI Emissions 32° – 158°F (0-70º C) -4° – 185°F (-20° to 85º C) 0.10% change at any angle No change after 10G RMS 20 to 2000 Hz No change after 50Gs for 11minutes Class A Physical Enclosure Weight Enclosure Material 7 x 16 x 12 in. (18 x 41 x 30.5 cm) 14 Pounds (6.3 kg) Structural resin * Custom timer ranges available 10 Section 7: System Schematic Figure 7-1 – Example of Geocontrol 2 panel. 11 Figure 7-2 – Geocontrol 2 Wiring Diagram 12 Section 8: Replacement Parts List Part Number Part Description 81150104 51150064 57500008 51150038 51150039 11150170 PPE011026 51150048 New Unit Assy, AC Power Cord Assy, DC Power Cord Assy, Air Inlet Hose Assy, Air Exhaust Hose Manual Fuse Potted PCB 13 NOTES 14 EDCF# 1565 DOCUMENT REVISIONS DESCRIPTION Initial Release Added charge time ranges for varying well depths (page 6), Added revision history table (page 15) - SP 15 REV/DATE 10/18/02 04/24/13 The Warranty For a period of one (1) year from date of first sale, product is warranted to be free from defects in materials and workmanship. Geotech agrees to repair or replace, at Geotech’s option, the portion proving defective, or at our option to refund the purchase price thereof. Geotech will have no warranty obligation if the product is subjected to abnormal operating conditions, accident, abuse, misuse, unauthorized modification, alteration, repair, or replacement of wear parts. User assumes all other risk, if any, including the risk of injury, loss, or damage, direct or consequential, arising out of the use, misuse, or inability to use this product. User agrees to use, maintain and install product in accordance with recommendations and instructions. User is responsible for transportation charges connected to the repair or replacement of product under this warranty. Equipment Return Policy A Return Material Authorization number (RMA #) is required prior to return of any equipment to our facilities, please call our 800 number for appropriate location. An RMA # will be issued upon receipt of your request to return equipment, which should include reasons for the return. Your return shipment to us must have this RMA # clearly marked on the outside of the package. Proof of date of purchase is required for processing of all warranty requests. This policy applies to both equipment sales and repair orders. FOR A RETURN MATERIAL AUTHORIZATION, PLEASE CALL OUR SERVICE DEPARTMENT AT 1-800-833-7958. Model Number: ________________ Serial Number: ________________ Date of Purchase: ________________ Equipment Decontamination Prior to return, all equipment must be thoroughly cleaned and decontaminated. Please make note on RMA form, the use of equipment, contaminants equipment was exposed to, and decontamination solutions/methods used. Geotech reserves the right to refuse any equipment not properly decontaminated. Geotech may also choose to decontaminate the equipment for a fee, which will be applied to the repair order invoice. 16 Geotech Environmental Equipment, Inc. 2650 East 40th Avenue Denver, Colorado 80205 (303) 320-4764 ● (800) 833-7958 ● FAX (303) 322-7242 email: sales@geotechenv.com website: www.geotechenv.com
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