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Adjust Pressure
The Product uses a 1/8 inch NPT female connection in the pressure input port.
Various adapters may be necessary to connect to the pressure standard. Always
make sure the hose, tubing, fittings, etc., have a rated working pressure at or
above the pressure of the Product. It is important that there are no leaks. Use
Teflon tape where appropriate.
To adjust the pressure:
1. Send this command to put the Product into pressure mode:
FUNC LOWER,{port} where port is either P1 or P2.
2. Send the OFFSET_ADJ? command.
3. Note the value returned.
4. Use the Pressure Standard to input a value equal or close to the noted value.
5. When the pressure is stable, send the OFFSET_ADJ n command where n is
the entered pressure.
6. Send the GAIN_ADJ? command.
7. Note the value returned.
8. Use the Pressure Standard to input a value equal or close to the noted value.
9. When the pressure is stable, send the command GAIN_ADJ n where n is the
applied pressure.
The pressure is now adjusted. Restore normal operation by turning the other
displays back on. Send DISPLAY UPPER, ON then DISPLAY MIDDLE, ON.
Check the unit display. There should be three bars across the display, the
upper three show reading, the bottom showing the F key functions. Then,
send HC_GASUI_ON. Verify that it is on by sending HC_GASUI?. The unit
should reply ON.
Pressure Calibrator
Calibration Adjustment
15
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