2. gas calibration method, Zero adjustment "2-1, Warning – RKI Instruments GD-70D Series User Manual
Page 64

8 Maintenance
8-2. Gas calibration method
GD-70D
- 64 -
8-2. Gas calibration method
Perform a gas calibration in each mode (zero adjustment mode
and span adjustment mode) using the calibration gas.
• Zero adjustment gas (collected in a gas sampling bag)
• Span adjustment gas (collected in a gas sampling bag)
• Gas sampling bag for exhaust
This is used to perform the zero adjustment.
NOTE
Before starting the zero adjustment, let the detector suck the zero adjustment gas and wait until the
indicator is stabilized.
WARNING
When the zero adjustment is performed in the atmosphere, check the atmosphere for freshness before
beginning the adjustment. If other gases exist, the adjustment cannot be performed properly, thus
leading to dangers when the gas leaks.
Exhaust
gas
GAS IN
GAS OUT
Calibration
gas
WARNING
After the adjustment is completed, do not forget to press the MODE key to return to the detection mode.
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