6 Maintenance
6-2. Calibration method
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(2) Span adjustment
Prepare a concentration-known calibration gas (1/2 of FS or 1.6 times the alarm setpoint) in a gas sampling
bag to perform the span adjustment.
NOTE
The span adjustment requires dedicated tools. We recommend the adjustment be performed by
RIKEN KEIKI.
CAUTION
Before starting the span adjustment, provide the detector with the calibration gas and wait until
the reading is stabilized.
Check that the model of replacement for the gas sensor agrees with the model shown on the
sensor model label attached to the detector head.
