Riken Keiki GD-84D-EX Series, Руководство по эксплуатации

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7. Maintenance 7-5 Performing calibration
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7-5-2 Running span adjustment
Perform span adjustment. This is required to ensure accurate measurements of gas concentrations.
Perform span adjustment for each sensor.
CAUTION

To perform span adjustment, introduce the gas for span adjustment, then wait for the reading to
stabilize.

Perform span adjustment using the span adjustment gas. If you introduce the wrong gas, depending
on the sensor, indication accuracy and overall response may deteriorate.

After introducing the gas for span adjustment, supply air or gas for zero calibration and allow to
stand for around five minutes.
Failure to allow enough time at this step may result in calibration problems, impaired indication
accuracy in detection mode, and slower response.
1 In maintenance mode, press the ▲ key or ▼ key to select
[2- 2 SPAN], then press the TEST/SET key.
2 Press the ▲ key or ▼ key to select the sensor for which
span adjustment is to be performed.
Press the ▲ key or ▼ key repeatedly to cycle through the
following settings: [A1] ⇔ [A2] ⇔ [B1] ⇔ [B2].
[----] for the selected sensor blinks.
3 Connect the calibration gas to this product.
Connect the gas sampling bag for span adjustment and the gas
sampling bag for exhaust gas to the product. (Refer to
‘7-5-3 Connecting the calibration gas’.)
Switch the flow passage in the chamber switching unit to the
selected sensor.
4 Press the TEST/SET key to confirm the sensor to be
calibrated.
This step confirms that the selected sensor and the flow
passage match.