Industrial Scientific OLDHAM 300 Series, Руководство по эксплуатации и техническому обслуживанию

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Zero adjustment should be performed in a gas and vapor free area. If this is not possible, synthetic
bottled air can be injected at a rate of 60l/h.
Use a bottle of test gas to adjust sensor sensitivity (concentration close to the alarm threshold or
corresponding to 30% of the measurement range at a minimum). The recommended rate is 60l/h.
Note: When dealing with dangerous gases, you MUST consult a specialized INDUSTRIAL
SCIENTIFIC technician or use another sensor pack recently pre-calibrated at a factory.
Note:
The detector should be calibrated using the intended flow-rate. The actual concentration of
gas may be underestimated if the detector was calibrated with too high of a flow rate.
IMPORTANT: For CEX 300 sensors, the calibration gas should contain 21% oxygen.
1.2.CEX 300 calibration
PROCEDURE
CONTROL UNIT DETECTOR
Put the line in calibration mode
Wait for the signal to stabilize and adjust the zero
on the display using the corresponding “ZERO”
potentiometer
Wait for the signal to stabilize and adjust the
sensitivity according to the calibration gas
Return the measuring line to normal operation mode
Determine if the air is clean. If not,
inject the sensor with synthetic or reconstituted air at a
flow rate of 60l/h.
Inject the recommended calibration gas at a flow rate
of 60l/h.
Stop injecting the sample gas and remove the
Gas injection pipe – Then wait and verify that the
sensor returns to ZERO (if not, repeat procedure)
CALIBRATION COMPLETE