PTU Series Ultrahigh-Purity Pressure Transducers

Transcription

1 PTU Series UltrahighPurity Pressure Transducers User s Manual The Swagelok PTU series pressure transducer provides electronic monitoring of system pressure for ultrahighpurity applications. The PTU series transducer is available with a variety of pressure ranges, process connections, electrical connections, and output signals. A Swagelok PTU series transducer will require mechanical and electrical installation; additionally, a setup and/or adjustment procedure may be required to prepare the unit for service. This manual is intended to provide the instructions necessary to install, startup, and troubleshoot the product. This manual covers the following topics: SECTION : Safety Advisory SECTION : VCR Fitting Installation SECTION : Welding Precautions SECTION : Electrical Installation SECTION 5: Zero Adjustment SECTION 6: Electronic Board Replacement SECTION 7: Troubleshooting For product technical data, including materials of construction, see the Swagelok Pressure Transducers, UltrahighPurity catalog. SECTION : Safety Advisory Do not connect the transducer to hazardous voltage. Use qualified personnel to install the transducer. Safe Product Use Follow any enclosed instructions and refer to the product catalog for detailed product information. When using a transducer, the total system design must be considered to ensure safe, troublefree performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user. Improper selection or misuse of the product may result in serious personal injury or property damage. These instructions are also available in Chinese, French, German, and Japanese. Contact your independent Swagelok sales and service representative. MSCRDPTU Revision 06WEL

2 SECTION : VCR Fitting Installation Swagelok VCR face seal fitting end connec Over tightening will damage the sealing tions with fixed threads must remain stationary during installation. Do not allow the sealing beads to rotate against the gasket. beads and may cause leakage. 6 GTAW 7 Fingertight GTAW 5a SS 8 5 Ni 90 Cu 5 5b 5c SECTION : Welding Precautions Qualified personnel should perform the welding (GTAW). Disconnect the transducer from any electrical device. Do not let the leads from the flying lead touch a metal surface during welding. Keep heat to the transducer to a minimum. MSCRDPTU Revision 06WEL

3 SECTION : Electrical Installation The Swagelok PTU series transducer is designed to operate with an unregulated input voltage of 0 < V dc < 0 ( to 0V with output signal 0. to 0. V). The exact operating input voltage is controlled by the load resistance (R L ). SWAGELOK TRANSDUCERS OUTPUT SIGNAL FLOW CURVE Required Input Voltage for Current ( to 0 ma) Output Transducers NELD090 Output signal and allowed load Transducer Output Type Input Power V dc Allowable Load R L 0. to 5. V dc 0 to 0 > 5 K 0. to 0. V dc to 0 > 0 K to 0 ma Max 0 V dc (0.0 R L 0 V dc) (0.0 R L 6 V dc) ➀ See graph ➀ Use this load equation when a PTU series digital display indicator is used. Allowable Load Current for external display or evaluation equipment can be supplied directly from the circuit when operating a transducer with current output. The Swagelok PTU series digital display indicator has a specific voltage drop of 6 V. This voltage drop must be considered when using the digital display indicator; see table above. If using another display, a voltage drop specific to that display must be considered Input Power Supply V dc (Required Supply Voltage) V dc wire system, current output transducers M, pin Circular connector V dc/s Direct wire, flying leads V dc/s Bendix, pin MIL plug V dc/s red () A D black B C () Tajimi Circular Connector R0R6F 5 pin SubD UB / Sig 0 V / Sig A C E V dc/s R L Legend Power Supply Load NOTE: Pin 5 and pin are bridged internally in the subd connector. MSCRDPTU Revision 06WEL

4 wire system, voltage output transducers M, pin Circular connector Direct wire, flying leads Bendix, pin MIL plug V dc S V dc V dc red () A D S brown () B C black S () Tajimi Circular Connector R0R6F UB Sig 0 V / Sig A C E 5 pin SubD R L V dc S NOTE: Pins 5 and are internally connected Legend Power Supply Load SECTION 5: Zero Adjustment The Swagelok PTU series transducer is factory calibrated and does not normally need field adjustment. Span adjustment is not necessary after zero point correction. For verification and adjustment of the zero point, depressurize the system to 0 psig (0 bar, 0 MPa) for gauge reference transducers. The potentiometer for the zero adjustment is protected inside the transducer housing. Use a 0.00 to in. ( to.5 mm) jeweler s screwdriver for adjustment. Procedure for Transducer with Top Access. Remove power to the transducer.. Remove the threaded locking ring on the top of transducer and gently extend the electrical connection to expose the zero adjustment screw.. Carefully pull the connector assembly out of the transducer housing as far as the internal connector cable will allow.. Restore power to the transducer. 5. Ensure the system is at 0 psig (0 bar, 0 MPa). 6. Monitor the output signal, and adjust the zero screw to ma or 0. V depending on the signal output. Turn the zero adjustment screw in a clockwise direction to increase the signal or in a counterclockwise direction to decrease the signal. 7. Remove power to the transducer again. MSCRDPTU Revision 06WEL Threaded locking ring Connector assembly Zero adjustment screw Keyed insertion point Pressure transducer housing 8. Rotate the connector assembly on the transducer housing to the keyed insertion point. 9. Replace and hand tighten the locking ring on the top of transducer to close access to the zero adjustment screws.

5 Procedure for Transducer with Side Access. Turn the locking ring until the zero adjustment screw is exposed.. Ensure the system is at 0 psig (0 bar, 0 MPa).. Monitor the output signal, and adjust the zero adjustment screw to ma or 0. V depending on the signal output. Turn the zero adjustment screw in a clockwise direction to increase the signal or in a counterclockwise direction to decrease the signal. Do not allow the screwdriver to contact any other part of the transducer.. Turn the locking ring until access to the zero adjustment screw is closed. Locking ring Zero adjustment screw SECTION 6: Electronic Board Replacement For board replacement, depressurize the system to 0 psig (0 bar, 0 MPa). Remove all power to the transducer. Disassembly. Use an appropriate grounding strap to protect the printed circuit board (PCB) and other electrical devices from voltage or static discharge to prevent possible damage.. Remove the locking ring on the top of transducer.. Carefully pull the connector assembly out of the transducer housing, as far as the internal connector cable will allow.. Remove the pin connector from the electronics board assembly. 5. Hook the electronics board with the provided removal tool. 6. While firmly holding the transducer housing, use the removal tool to pull the electronics board assembly straight out of the transducer housing assembly. Reassembly. Align the new electronic board with the slots in the plastic alignment ring inside the transducer housing.. Firmly push the new electronics board assembly into the transducer body as far as it will go.. Align the pins on the connector from the electrical connector with the sockets on the new electronic board assembly.. Rotate the connector assembly on the transducer housing to the keyed insertion point. 5. Replace and hand tighten the locking ring on the top of transducer. 6. Restore power to the transducer and verify the zero point. Electronics board Electronics board Transducer with Top Access Transducer with Side Access Pressure transducer housing Pressure transducer housing 5 MSCRDPTU Revision 06WEL

6 SECTION 7: Troubleshooting Error Possible Reason Remedy No signal output Steady signal despite pressure variation Steady, elevated signal despite pressure variation Failure of power supply; wiring interrupted Transducer miswired Defective electronics Defective electronics Transducer failure through overpressurization Defective electronics Check power supply and wiring; replace defective components Check wiring Change electronics board Change electronics board Replace transducer Change electronics board Supply voltage too low Adjust supply voltage Full span reading too low Load impedance too high Adjust supply voltage (See Output signal and allowed load table in Section ) Zero signal too low Zero adjustment made incorrectly Adjust zero point Zero adjustment made incorrectly Adjust zero point Zero signal too high Transducer failure through Replace transducer overpressurization Nonlinear signal output despite correct zero adjustment Transducer failure through overpressurization Replace transducer Caution: Do not mix or interchange parts with those of other manufacturers. Swagelok TM Swagelok Company Bendix TM Amphenol Corporation 00, 006 Swagelok Company 6 MSCRDPTU Revision 06WEL