YOKOGAWA OX100, User Manual

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<3. Operation>
3-1
IM 11M10A01-01E
3. Operation
3.1 Calibration
• As described below, calibrate the span immediately before starting a measurement.
(1) Before using the 0 to 1000 ppm O
2
range, perform one-point calibration with calibration gas
of concentration between 1000±100 ppm O
2
/N2.
(2) Before using the 0.1 to 25% O
2
range, perform one-point calibration with atmospheric air.
(3) If you use both ppm and % ranges, be sure to calibrate the ranges in the following order:
first perform one-point calibration with air, then 1000 ppm O
2
calibration.
• Before calibrating, turn on the power and allow the OX100 to warm up for at least 10
minutes then perfom air cleaning.
3.1.1 One-point Calibration in Atmospheric Air (Span Calibration)
Press the Mode key twice, and confirm that the “Air” lamp is lit.
Supply cleaning air to the sensor, and then press the ENT key. This completes 20.6% O
2
calibration, and returns the instrument to measurement status (the display indicates the O
2
concentration.
CAUTION
If calibration fails, and the ALM lamp lights for two seconds, replace the sensor (part no. K9424BA).
4th Edition : Oct. 23, 2019-00