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RKI Instruments GX-82A User Manual

Page 24

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Model GX-82A Instruction Manual

062796

RKI Instruments, Inc.

21

3. Demand Zero

Press and hold the AIR/▲ switch on the control panel until a tone
sounds. Follow the instructions on the display:

The instrument will automatically set the LEL and toxic gas
circuits to zero and the O

2

circuit to 20.9%.

Calibration Start-up

1. Preparation

Assemble the calibration cylinder (Four-Gas for Auto Calibration,
or a specific cylinder for separate gas calibration), valve/regulator,
flowmeter, and adapter cup.

Note

Allow adequate time for the GX-82A to respond to changes
in adjustment. Adjust the controls in small increments, then
wait approximately 3 seconds for a change in reading.
Ignore alarms during the calibration procedure.

DEMAND ZERO

HOLD AIR KEY

ADJUSTING ZERO

HOLD AIR KEY

ZERO ADJUSTED

RELEASE AIR KEY