Industrial Scientific OLDHAM 300 Series, Operating And Maintenance Manual

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1.5. CSC 300 (semiconductor) calibration
Flip the switch (Ref. 1, Fig. 17) into the “CAL” position.
Ensure that the sensor is in clean air, otherwise inject synthetic air into it using the calibration kit
and referring to the recommendations below:
Important:
to correctly calibrate a sensor equipped with a semi-conductor cell, use of a
humidifier kit is MANDATORY (ref: 6335919) – Fig. 18
USING THE HUMIDIFIER KIT
Lift the lid (Fig. 18 ref. A) and, using a washbottle, moisten the filter, without saturating it, with
distilled water.
Replace the lid and check that all parts are properly assembled and that the assembly is fully
airtight.
Adjust the flow rate to 60 l/h and wait 10 minutes until the humidifier is fully purged.
Apply the gas introduction pipe to the nose of the sensor and wait at least five minutes for the
measurement to stabilize.
Note : the sensor must be powered for at least two hours before any adjustment can be made.
Connect a voltmeter as indicated (Fig. 19 – Ref. 3) and adjust, using potentiometer P5 (Fig. 19, Ref.
1). The output signal must be equal to 880 mV .
Rep 1
Fig. 17
Circuit du capteur CTX/CSC 300
MES
CAL
Vers capteur
Entrée gaz
Fig. 18
Gas
To detector