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

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Stop injecting the calibration gas. Remove the gas injection pipe, then wait and verify that the signal
returns to ZERO (repeat procedure if it does not).
Flip the maintenance switch into the “MES” (measure) position. The yellow light will turn off.
CALIBRATION COMPLETE
Method 2: CTX 300 without display except for O
2
– SC – CO
2
The sensor is operating:
Flip the maintenance switch (Ref. 13, Fig 5) into the “CAL” (calibration) position: the sensor will
send a 2 mA current to the central controller (maintenance mode)
Verify that the sensor is located in a clean-air environment. If not, inject synthetic air at a flow rate
of 30 l/h (follow the instructions included in the calibration kit)
Connect a voltmeter to the V+ and V - terminals (caliber mV/DC) (Re f. 1, Fig. 13).
Wait for the signal to stabilize and adjust the ZERO by using the ZERO potentiometer located on
the sensor pack. (Ref. 1, Fig. 14) The output signal should be 0m V
Ref. 1
Ref. 2
Fig. 14
Ref. 5
-
V
+
Rep1
Fig. 13
MES
CAL