5 How to Operate
5-7. Simplified calibration (zero/span adjustment)
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5-7. Simplified calibration (zero/span adjustment)
There are two ways to perform calibration for the alarm system: executing simplified calibration from the gas
test mode and executing calibration from the maintenance mode (regular maintenance mode). This section
describes how to perform the simplified calibration. See Pages 62 and 63 for the calibration executed from
the regular maintenance mode. If a customer needs to perform calibration, we recommend the simplified
calibration be performed.
Perform calibration using the calibration gas.
Zero adjustment gas (collected in a gas
sampling bag)
Calibration gas (collected in a gas sampling
bag)
Gas sampling bag for exhaust gas
* When a diffusion type detector is connected, a pump is required.
<How to Perform Simplified Calibration>
(1) Slide the MAINT switch to the calibration target channel side.
WARNING
After the adjustment is completed, never fail to
return to the detection mode.
Gas sampling
bag
Pump
Needle valve
Flow meter
WARNING
Perform zero adjustment using the zero adjustment gas or in a place where the surrounding air is
fresh.
If interference gases exist, the adjustment cannot be performed properly, thus leading to dangers
when the gas leaks actually.
CAUTION
Always perform zero adjustment after cycling the power or recovering from a blackout.
Slide to either side