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Summary of Contents for Hygrodynamics 8075A
- Page 1 Portable Dew Point Monitor for Compressed Air Desiccant Dryers Model 8075A newport-scientific.com Newport Scientific, Inc P 301-498-6700 8246E Sandy Court F 301-490-2313 Jessup, MD 20785-9632 email sales@newport-scientific.com hygrotechnical@newport-scientific.com...
- Page 2 8075A_B.docx February 2017...
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Page 3: Table Of Contents
Contents Specifications ................1 Product Overview ................ 2 Features and Accessories ............3 Operation ..................5 Sample Connection Requirements .......... 5 Power Connection ..............6 Dryer Testing ................6 Remote Monitoring/Data Logging ........... 8 Maintenance and Adjustments ........... 9 Sample Hose Replacement ............9 Filter Replacement .............. -
Page 4: Specifications
Specifications DEW POINT RANGE -40F to +15F (-40C to -9C) TYPICAL ACCURACY ±3F (±1.7C) USABLE PRESSURE RANGE 20psig to 150psig COMPRESSED AIR < 5SCFH CONSUMPTION ALARM SET POINT -10F (-23C) SAMPLE AIR CONNECTION Industrial interchange coupling set with 1/4” NPT male threads SENSOR PART NUMBER 1205DM... -
Page 5: Product Overview
Product Overview The 8075A dew point monitor is used to check the function of a desiccant dryer in a compressed air system. The monitor uses an internal bleed orifice to continuously sample a small amount of process air. The internal sensor is exposed to the line pressure of the compressed air system and therefore reads actual pressure dew point. -
Page 6: Features And Accessories
Features and Accessories The dew point monitor and its accessories are housed in a portable carrying case. Before using the monitor, familiarize yourself with the features shown below: 8075A_B.docx February 2017... - Page 7 4-20mA and 0-5V output for remote monitoring or data logging. Mates with standard 3 pin M8 female cable. NOTE: The 8075A is shipped with a paper desiccant pack which can be discarded when the unit is unpacked. 8075A_B.docx February 2017...
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Page 8: Operation
Operation The 8075A is designed to sample compressed air. If you are attempting to monitor air at atmospheric pressure, you need a vacuum assisted monitor, consult the factory for other model options. CAUTION: The carrying case is not heat resistant. It may melt or distort if left resting on the hot parts of a heated dryer. -
Page 9: Power Connection
If air lines are wet, don’t connect the 8075A or sensor damage might occur. Power Connection The 8075A is supplied with a 6 foot line cord for connection to power. Always connect the monitor to the correct supply voltage. Do not attempt to replace the line cord with a different plug type to accommodate other supply voltages. - Page 10 The built in red light and audible beeper will indicate dryer trouble within moments of a dew point rise. A constantly high reading on the 8075A may indicate a malfunctioning dryer. NOTE: When storing the 8075A, carefully coil the sample hose and snap the crimped metal ferrule into the storage clip.
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Page 11: Remote Monitoring/Data Logging
Remote Monitoring/Data Logging The 8075A analog output jack can be used to monitor or log dew point over a period of time. The output jack is a 3 pin male M8 type connector. This connector accepts standard threaded or snap fit female M8 cables. -
Page 12: Maintenance And Adjustments
Maintenance and Adjustments Newport Scientific offers a maintenance and calibration service for the 8075A. This service should be performed annually. Alternatively, most wearable parts can be replaced by the user. Sample Hose Replacement A contaminated sample hose will slow down the response time of the monitor. -
Page 13: Monitor Disassembly
Monitor Disassembly To access the serviceable parts inside the monitor, the 8075A panel must be removed from the carrying case. WARNING: Unplug the 8075A from power before disassembly. Even with the power switch off, voltages are present inside the unit. -
Page 14: Sensor Replacement
Sensor Replacement The internal sensor should be replaced on a yearly basis. It is difficult to verify the accuracy of the sensor in the field. For most users, an annual sensor replacement can assure good operation of the monitor. It is recommended to clean the sample tubing whenever the sensor is replaced. -
Page 15: Backpressure Orifice Inspection
Backpressure Orifice Inspection Refer to the Sensor Replacement section to locate the backpressure orifice. Remove the clear tubing from the orifice barbed end. Then use a pair of wrenches to unscrew the orifice (avoid torqueing the pressure gauge mounting). Hold the fitting up to a light, you should be able to see light coming through the tiny hole in the orifice. -
Page 16: Display Units & Alarm Set Point Adjust
(high dew point indication), use the DISPLAY MODE SWITCH labeled S1 and the ALARM ADJUST potentiometer labeled SET1. WARNING: The alarm set point adjustment is performed with the 8075A powered on. Avoid touching live electrical parts during this procedure as hazardous voltages are present! 8075A_B.docx February 2017... - Page 17 The front panel display will now show the actual measured dew point (note that most ambient air will cause the monitor to read +15F). Remove power and reinstall the 8075A panel into the carrying case. 8075A_B.docx February 2017...
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Page 18: Troubleshooting
Troubleshooting Monitor display is stuck at +15F (-9C) Possible Cause Corrective Action Inadequate system pressure. A minimum of 20psig is recommended to force airflow through the monitor. Clogged sample air filter A pressure reading on the monitor that is much less than your actual line pressure might indicate a clogged sample filter. - Page 19 Monitor reads -40 when turned on and doesn’t change Possible Cause Corrective Action Dry air remaining in sensor If monitor was used previously housing on -40F DP air, this air can remain in the unit for days. Connect monitor to un-dried compressed air momentarily to purge sensor until display responds.
- Page 20 Monitor is slow to respond Possible Cause Corrective Action Dirty sample air filter Replace filter. Sensor old or damaged Replace sensor. Contaminated sample hose Inspect sample tubing and replace if loaded with dust or oil. 8075A_B.docx February 2017...
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Page 21: Spare Parts & Accessories
Spare Parts & Accessories Item Part No. Sensor 1205DM Filter 3305010 Sample hose assembly 4100210 2 pin insert 0900106 Gasket for insert 1000613G Field wireable analog out connector 0300201 8075A_B.docx February 2017... -
Page 22: Notes
Notes 8075A_B.docx February 2017... -
Page 23: Warranty
SIX MONTHS from date of shipment of Hygrodynamics Wide-Range Sensors and THREE MONTHS from date of shipment of Hygrodynamics Narrow-Range Sensors and repaired equipment. THIS WARRANTY IS EXPRESSLY IN LIEU OF OTHER WARRANTIES. Seller shall not be held liable for any... - Page 24 newport-scientific.com Newport Scientific, Inc P 301-498-6700 8246E Sandy Court F 301-490-2313 Jessup, MD 20785-9632 email sales@newport-scientific.com hygrotechnical@newport-scientific.com...
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