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Summary of Contents for Seametrics PT12
- Page 1 PT12 Pressure/Temperature Sensor Instructions For Sales & Service Contact 2650 E. 40th Ave. • Denver, CO 80205 Phone 303-320-4764 • Fax 303-322-7242 1-800-833-7958 PROUDLY MADE IN THE www.geotechenv.com 9001:2008...
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Page 2: Table Of Contents
TABLE OF CONTENTS PT12 INSTRUCTIONS General Information General Information ..............................Page 3 Dimensions ..................................Page 3 Specifications ................................Page 4 How Pressure Sensors Work............................Page 5 Initial Inspection and Handling ..........................Page 6 Do’s and Don’ts ................................Page 6 Installation Cable Wiring ..................................Page 7 Installing the Sensor ..............................Page 7 Desiccant Use ................................Page 7... -
Page 3: General Information
This sensor communicates to absolute pressure. If you are using an absolute PT12, via SDI-12 (v1.3) or Modbus RTU (RS485)protocol. contact your representative for details on how our PT12-BV ®... -
Page 4: Specifications
Environmental IP68, NEMA 6P *Specifications subject to change. Please consult out web site for the most current data (seametrics.com). Modbus is a registered trademark of Schneider Electric. 1 Higher pressure ranges available upon request 2 ±0.25% accuracy FSO (max) at this range 3 Depth range for absolute sensors has 14.7 PSI subtracted to give actual depth allowed. -
Page 5: How Pressure Sensors Work
PT12 INSTRUCTIONS GENERAL INFORMATION How Pressure Sensors Work Patm Liquids and gasses do not retain a fixed shape. Both have the ability to flow and are often referred to as fluids. One fundamental law for a fluid is that the fluid Water Line exerts an equal pressure in all directions at a given level. -
Page 6: Initial Inspection And Handling
PT12 INSTRUCTIONS GENERAL INFORMATION Initial Inspection and Handling Upon receipt of your sensor, inspect the shipping package for damage. If any damage is apparent, note the signs of damage on the appropriate shipping form. After opening the carton, look for concealed damage, such as a cut cable. If concealed damage is found, immediately file a claim with the carrier. -
Page 7: Installation
Strapping the sensor body with tie wraps or tape will not 12 VDC- (Gnd) Shield Earth ground hurt it. Seametrics can provide an optional 1/4” NPT input adapter which is interchangeable with the standard end For Modbus ® cone for those applications where it is necessary to directly attach the sensor to a pipe, tank, or other pipe port. -
Page 8: Grounding Issues
PT12 INSTRUCTIONS INSTALLATION Grounding Issues Sensor/Data Logger Configuration It is commonly known that when using electronic The PT12 submersible pressure/temperature transducer is equipment, both personnel and equipment need to be designed for use with SDI-12 or Modbus data loggers. ®... -
Page 9: Operation/Modbus Rtu
PT12 INSTRUCTIONS OPERATION/MODBUS RTU Register Definitions This section explains how to read your PT12 via Modbus ® RTU. (If you want to read via SDI-12, see the next section The physical register addresses on the PT12 start numbering beginning on page 11.) from zero –... -
Page 10: Sensor Configuration/Control
PT12 INSTRUCTIONS OPERATION/MODBUS RTU Sensor Configuration/Control Calibration and Conversion Constants The data is returned as a 32-bit IEEE floating-point value, Zero- One- +40,001 Description high word first, also referred to as big-endian, float inverse, Based Based or Float AB CD. -
Page 11: Operation/Sdi-12
<a>+7.15863<cr><lf> Address Address Request for Returned value(s) values read SDI-12 Commands Sensor Identification <a>I! <a>13 INWUSA PT12 0.13ssssssssss<cr><lf> Note: 0.13 will change to reflect current firmware version. ssssssssss = device serial number Acknowledge Active, Address Query <a>! <a><cr><lf> ?! <a><cr><lf>... - Page 12 OPERATION/SDI - 12 PT12 INSTRUCTIONS M5!, M6!, and M7! only available on PT12-BV/PT12 combination units! <a>M5! <a>0023<cr><lf> Request barometrically compensated down- hole pressure, down-hole temperature, surface temperature <a>D0! <a>+2.58613+19.2100+21.05122<cr><lf> Read: barometrically compensated down-hole pressure, down-hole temperature, surface temperature <a>M6! <a>0024<cr><lf>...
- Page 13 <a>D0! <a>+7.15863+7.23215+7.051283+25.0000<cr><lf> Read average pressure, max. pressure, min. pressure, average temperature C5!, C6!, and C7! only available on PT12-BV/PT12 combination units! <a>C5! <a>0023<cr><lf> Request barometrically compensated down- hole pressure, down-hole temperature, surface temperature <a>D0! <a>+2.58613+19.2100+21.05122<cr><lf>...
- Page 14 <a>D0! <a>+7.15863+7.23215+7.051283+25.0000{crc}<cr><lf> Read average pressure, max. pressure, min. pressure, average temperature CC5!, CC6!, and CC7! only available on PT12-BV/PT12 combination units! <a>CC5! <a>0023<cr><lf> Request barometrically compensated down- hole pressure, down-hole temperature, surface temperature <a>D0! <a>+2.58613+19.2100+21.05122{crc}<cr><lf>...
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Page 15: Calibration Register Definitions
OPERATION/SDI - 12 PT12 INSTRUCTIONS Calibration Register Definitions Field calibration values can be set by user. If set, these values will be applied to readings before values are returned. All calibration registers contain floating point values. SDI-12 Reg. ID Mnemonic... -
Page 16: Maintenance
Pressure element becoming a light pink, which indicates full saturation and time to replace. Replacement desiccant and hydrophobic Water inlet filters can be purchased from Seametrics. To Change the Desiccant: End cone • Pulling gently remove the black tube fitting from Gently twist off the end cone and carefully remove debris the clear desiccant tube. -
Page 17: Sensor/Cable/End Connections
PT12 INSTRUCTIONS MAINTENANCE Sensor There are no user-serviceable parts. If problems develop with sensor stability or accuracy, contact Seametrics. If the transducers have been exposed to hazardous materials, do not return them without notification and authorization. Cable Cable can be damaged by abrasion, sharp objects, twisting, crimping, crushing, or pulling. -
Page 18: Troubleshooting
TROUBLESHOOTING PT12 INSTRUCTIONS Problem Probable Causes Things to try… Erratic readings Poor connection due to moisture between Dry thoroughly. Be sure desiccant is fresh (see contacts in connector Maintenance section). Loose or broken wires in connector Repair or return for evaluation and repair... - Page 19 PT12 INSTRUCTIONS WARRANTY/DISCLAIMER LIMITED WARRANTY/DISCLAIMER - PT12 SUBMERSIBLE PRESSURE TRANSDUCER A. Seller warrants that products manufactured by Seller when properly installed, used and maintained with a properly installed desiccant tube, shall be free from defects in material and workmanship. Seller’s obligation under this warranty shall be limited to replacing or repairing the part or parts or, at Seller’s option, the products which prove defective in...
- Page 20 Seametrics • 19026 72nd Avenue South • Kent, Washington 98032 • USA (P) 253.872.0284 • (F) 253.872.0285 • 1.800.975.8153 • seametrics.com LT-14372r18 20180306 3/6/2018...
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