6 Maintenance
6-2. Gas calibration method
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<Span Adjustment "2-2">
This is used to perform the span adjustment.
1. Select "2-2" (Span Calibration) in the Maintenance Mode.
2. Run calibration gas for the specified time, press "
▲
/
▼
" key to adjust the LED display to the gas
concentration, and then press "SET" key to make the display blink. Press "SET" key again to set the gas
concentration. After confirming, make sure that [PASS] is displayed.
3. After the span adjustment, press and hold the "MENU" key to return to the measurement state.
NOTE
If the span adjustment failed since the reading was significantly fluctuated from the introduced gas
concentration, it returns to 2-2 after FAIL rather than PASS is displayed. In this case, the span
adjustment has not been completed.
Check if the correct concentration calibration gas has been provided and check the gas adjustment
tool for a gas leak. If there are mistakes, perform the span adjustment again.
If the span adjustment cannot be performed even when there is no mistake or after recalibration, the
gas sensor life might have expired. After turning off the power supply, please contact RIKEN KEIKI.
WARNING
Before starting the span adjustment, provide the detector with the calibration gas and wait until the
reading is stabilized.
Buffer
Pump
Needle
valve
OUT
Gas
sampling
bag
