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Summary of Contents for Servomex AquaXact 1688
- Page 1 AquaXact 1688 Dew Point Transmitter Operator Manual...
- Page 2 Servomex Group Limited. This handbook is accurate at the date of printing, but will be superseded and should be disregarded if specifications or appearance are changed.
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Page 3: Table Of Contents
Sensor .......................... 21 Storage and disposal ......................23 Storage ......................... 23 Disposal ........................24 10 Spares ........................... 25 11 Warranty ..........................26 11.1 Maintenance policy ....................... 27 11.2 Return Authorization Request ..................27 AquaXact Issue 1.0 © Servomex Group Limited 2017... - Page 4 Relationship of 4-20 mA output and instrument reading in ppmV or LBS ..34 Appendix D Uncertainty in LBS & ppmV calculations ............35 Appendix E Sensor response time ..................36 AquaXact 1688 Calibration Options ................37 Index ............................38 © Servomex Group Limited 2017 AquaXact Issue 1.0...
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Page 5: Introduction
Other information provided by the manual Note: Notes give extra information about the equipment. Hint: Hints give helpful tips and highlights information which is useful for you to be aware of, for example, specific operating conditions. AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 6: Product Overview
Servomex controllers. The AquaXact controller also allows field span measurements and supports the field based sensor tip replacement process (Appendix E). The AquaXact 1688’s advanced design allows it to be housed in a small stainless steel enclosure behind the sensor probe making the transmitter and sensor a single integrated unit. -
Page 7: Unpacking
Unpacking Read this manual carefully BEFORE you remove the AquaXact 1688 Dew Point Transmitter from its box, or you attempt to install, commission or use the equipment. Examine the AquaXact package for damage or mishandling. If any damage is evident notify the carrier and request an inspection. -
Page 8: Safety
Safety The Servomex thin film Al sensor is designed and field proven to be highly reliable, rugged and maintenance free. However the user should be aware of the following precautions: Installation To avoid prolonged dry-down (when expecting to measure dew points drier than -65 ºC), do not expose the sensor to room air longer than 1 - 2... -
Page 9: Operation
AC power wiring should be routed as far away from the AquaXact 1688 and its wiring as practical. AquaXact Issue 1.0... -
Page 10: Installation
1688 Dew Point Transmitter unless you are trained and know what you are doing. Follow the instructions in this section to safely install the AquaXact 1688 Dew Point Transmitter. Do not install the unit in places subject to extreme mechanical vibration or shock. - Page 11 Also consider the need to isolate (depressurize) before installing or removing the sensor. Variations in line pressure affect the reading of the sensor because dew point varies with pressure. Figure 4-1: In-situ installation AquaXact Issue 1.0 © Servomex Group Limited 2017...
- Page 12 Contact your local Servomex sales office for more information on sampling system options It is generally recommended to measure at ambient pressure for the following reasons: ...
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Page 13: Mechanical Installation
(the tension washer should be compressed), so that it does not come loose during use, do not over-tighten because the sintered material will break. AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 14: Electrical Installation
When the connector engages, secure it with the retention screw. The AquaXact 1688 will draw 4 mA to 20 mA from the power supply depending on the dew point being measured. The dew points corresponding to 4 mA and 20 mA are the full -100 °C to 20 °C range. - Page 15 Figure 4-4: Electrical installation – connector and connections AquaXact Issue 1.0 © Servomex Group Limited 2017...
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Page 16: Operation
The instrument is ready for use as soon as the power cable is installed. When power is applied the instrument will initialize its program. Once completed and powered, the device is on line but gas sample lines could take several hours to clean up and reach equilibrium. © Servomex Group Limited 2017 AquaXact Issue 1.0... -
Page 17: Technical Specification
°C dew point °F dew point ppmV Controls: Digital RS485 with AquaXact Controller Outputs: Analog and digital outputs are available: 4-20 mA drawn by the instrument from the AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 18: Sensor
Output resolution is 0.1 °C dew point or ~0.25 µA whichever is greater. In the digital mode the AquaXact 1688 can be remotely operated, the dew point & temperature can be read. Alarms: The 4-20 mA signal or the digital output may be used by an external device to operate relays. -
Page 19: Routine Maintenance
The AquaXact 1688 Dew Point Transmitter does not contain any user serviceable parts. Do not attempt to maintain or service the AquaXact 1688 Dew Point Transmitter unless you are trained and know what you are doing. The transmitter must be maintained by a factory-trained field service engineer. -
Page 20: Troubleshooting
1. Cable open 1. Check cables 2. Fuse open due to 2. Check power 13 to excessive voltage 33 Vdc Check source polarity pin 7 +; Pin 1 – 3. Cycle power © Servomex Group Limited 2017 AquaXact Issue 1.0... -
Page 21: Sensor
Slow Response It is usually more satisfactory to bleed a sample gas at atmospheric pressure through the sensor sampling chamber, and to use 1/8” (3 mm) o.d. sample pipe. AquaXact Issue 1.0 © Servomex Group Limited 2017... - Page 22 Remove (unscrew) sensor, if the current does not change even momentarily, then the problem is with the instrument, otherwise the problem may be with the sensor. Check sensor connection or replace sensor. © Servomex Group Limited 2017 AquaXact Issue 1.0...
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Page 23: Storage And Disposal
Storage and disposal Storage All Servomex AquaXact 1688 Al sensors and replacement tips are shipped in glass storage bottles in order to maintain sensor integrity. The storage bottle is partially filled with a desiccant to keep the sensor dry and ready for use. -
Page 24: Disposal
Dispose of the transmitter safely, and in accordance with all of your local and national safety and environmental requirements. Hint: If you send the equipment to Servomex or your local Servomex agent for disposal, it must be accompanied by a correctly completed decontamination certificate and a Return Authorization Number (RAN) (section 11.2). -
Page 25: Spares
If you do, you can damage the transmitter and invalidate any warranty. The standard spares available for the AquaXact are shown below. You can order these spares from Servomex or your Servomex agent. Part number Description AquaXact 1688 Sensor - Tip 220533 AquaXact Issue 1.0... -
Page 26: Warranty
This warranty is effective from the date of delivery to the original purchaser. The equipment must be determined by Servomex to have been defective for the warranty to be valid. -
Page 27: Maintenance Policy
Servomex will provide an estimate and wait for approval before commencing repairs. For your convenience a Return Authorization Request Form is provided in section 11.2. Fill out the form and sent it back to Servomex to obtain a RAN. 11.2 Return Authorization Request Servomex must approve and sign a Return Authorization Number (RAN) to any device being returned. - Page 28 To obtain a RAN, fill out a copy of this form and contact your regional Servomex service group. Customer information: Company name: Address: Contact name: Phone: Fax: Equipment information: AquaXact 1688 Part or model number: Serial number: Original purchase date:...
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Page 29: Appendix A Mechanical Drawings
Appendix A Mechanical Drawings Dew point transmitter AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 30: Sample Block
Sample block © Servomex Group Limited 2017 AquaXact Issue 1.0... -
Page 31: Sampling Panel
Sampling panel AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 32: Appendix B Current Vs. Dew Point
Note that the computation is such that the current is linear to the selected engineering units. Hence, ordering an AquaXact 1688 with the units set to ppm will cause the analog output to be linearly proportional to those units (approximately logarithmically proportional to dew point), refer to the graph in Appendix C. - Page 33 In general, if the dew point is monitored in °C or °F, there is no need to change the factory default -100 °C to +20 °C settings, because the 4-20 mA provides sufficient resolution to measure the output better than the specified accuracy of the sensor. AquaXact Issue 1.0 © Servomex Group Limited 2017...
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Page 34: Appendix C Relationship Of 4-20 Ma Output And Instrument Reading In Ppmv Or Lbs
Appendix C Relationship of 4-20 mA output and instrument reading in ppmV or LBS © Servomex Group Limited 2017 AquaXact Issue 1.0... -
Page 35: Appendix D Uncertainty In Lbs & Ppmv Calculations
Appendix D Uncertainty in LBS & ppmV calculations AquaXact Issue 1.0 © Servomex Group Limited 2017... -
Page 36: Appendix E Sensor Response Time
Appendix E Sensor response time © Servomex Group Limited 2017 AquaXact Issue 1.0... -
Page 37: Aquaxact 1688 Calibration Options
If you do not have either a MonoExact DF310E or dedicated AquaXact 1688 controller you will need to return your transmitter to Servomex for recalibration or have a service engineer visit during which the sensor tip can be replaced. -
Page 38: Index
................ 21 maintenance policy ............27 mechanical drawings ............. 29 uncertainty ..............35 mechanical installation ..........13 unpacking................. 7 operation ............... 16 warranty ................ 26 safety ................9 starting up ..............16 © Servomex Group Limited 2017 AquaXact Issue 1.0...
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