Gow-Mac 21-080 Operating Manual

Mini gas leak detector

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Operating Manual

Read instructions before operating

Model 21-080

Mini Gas Leak Detector

Model 21-080: 100 - 240 VAC, 50/60 Hz

June 2023

Rev. 0

For new instrument right out of the box or one

that has not been used for quite some time:

IMPORTANT

ALLOW UP TO 7 HOURS FOR FULL CHARGE.

FULL RUNTIME WILL RETURN AFTER

SEVERAL CHARGE/DISCHARGE CYCLES.

277 Brodhead Road, Bethlehem, PA 18017-8600 U.S.A. Tel: (610) 954-9000

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Page 1 Operating Manual Read instructions before operating Model 21-080 Mini Gas Leak Detector Model 21-080: 100 - 240 VAC, 50/60 Hz June 2023 Rev. 0 For new instrument right out of the box or one that has not been used for quite some time: IMPORTANT ALLOW UP TO 7 HOURS FOR FULL CHARGE.
Page 2 GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 3: Table Of Contents
Copyright© 2005-2023 by GOW-MAC Instrument Co. ® ®GOW-MAC is a registered trademark of GOW-MAC Instrument Co., USA GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 4 GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 5: Model 21-080 Mini Gas Leak Detector
The instrument contains a thermistor-type thermal conductivity detector (TCD), diaphragm pump, and a printed circuit board containing all microelectronic devices. The Model 21-080 operates on 100-240 VAC, 50/60 Hz and three (3) internal rechargeable Ni-MH cells. An audible tone generator is incorporated with a speaker output.
Page 6: Instrument Operation
0 to 4 bars to indicate battery charge status. The bottom row shows “Sensing” indicating that the instrument is operating in leak detection mode. During the 20 second warmup period, all buttons including power are disabled. GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 7 Wand with internal tubing through which the internal pump draws the gas sample. The pump is energized and therefore drawing sample all the time that the 21-080 power is on. Use care to prevent the probe inlet from getting submerged in water and to prevent dust ingress.
Page 8: Operation
“sensing”. 3-2-4 Signal zero can be done at any time by briefly pressing MENU/ZERO button (extended press of the MENU/ZERO button is the way to enter the 21-080 menu). 3-2-5 Activate the audible alarm to supplement the visual output on the display. 3-2-6 Areas to be tested must be free of oil, grease, paint, water, and other contaminants that might mask a leak or be drawn into the sampling probe.
Page 9: Leak Checking Procedure
Remove the probe from the area, allow the segments to settle to zero (rezero if necessary), and return probe to the suspected location to verify the leak. For more detailed information on leak detector sensitivity, refer Section 8-0 Sensitivity. GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 10: 21-080 Parameter Descriptions
21-080 Parameter Descriptions The 21-080 parameters are functions that can be changed in the menu. 21-080 Default Function Available range Parameter setting Audible alarm sound Alarm volume 0 – 100 % 50 % level Select constant Alarm enable and type...
Page 11 MENU/ZERO button or will not save. Exit menu with long press of the MENU/ZERO button. The 21-080 exits the menu automatically after about 1 minute of no activity in the menu. The 21-080 performs a signal zero automatically upon menu exit.
Page 12 Auto Zero On-Off The 21-080 is in a “zero” state when no display segments are lit; when the detector output equals a reference output that is saved in the firmware. The detector output drifts due to environmental conditions especially temperature, drafts, and ambient air (the reference part of the detector output).
Page 13: Troubleshooting
6-3-3 Pump operating improperly. Replace pump. 6-3-4 Check instrument settings. Reset to factory defaults if necessary. If repair service is needed, contact our repair department at: repairs@gow-mac.com or scan the Q code for our website and click on Services Tab and the Repair Tab for further instructions.
Page 14: Charging The Cell / Ac Operation
Sensitivity The 21-080 leak detector user is encouraged to read ASTM standard ASTM E2024/ E2024M-11 Standard Practice for Atmospheric Leaks Using a Thermal Conductivity Leak Detector. Recommended technique for sampling with a leak detector probe. The probe tip shall be held not more than 1 mm (0.04 inch) from the test surface and moved not faster...
Page 15: Replacement Parts List
Pump, vacuum micro, 3 V dc 119-126 Cell, 1.2 V / 1.9 Ah, nickel metal hydride, rechargeable, 3 cells per instrument 118-100 A/C power adapter/charger, 100 to 240 VAC input GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 16 GOW-MAC Instrument Co. Model 21-080 Gas Leak Detector Rev. 0, 0623...
Page 17 Hydrogen Palladium Tubes are not covered by this warranty. All requests for service or repair under this warranty must be received within the warranty period by GOW-MAC or its authorized representative. All repairs are made at GOW-MAC plants or at the ® office of authorized representatives.
Page 18 City: State/Country: Zip : E-mail address: BEFORE item can be shipped, fax completed form to: (610) 954-0599 or e-mail it to: repairs@gow-mac.com For GOW-MAC Use Only: Signed: Date Passed Safety Inspection. OK to proceed to Repair Dept. Chemical Safety Officer...