TELEDYNE OLDHAM SIMTRONICS CTX 300, Руководство пользователя

Страница: 21 / 40

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
17
5.1.4 CTX 300 calibration (for Semiconductor)
This is a Semiconductor type sensor.
•
Flip the switch (rep. 1) into the CAL position.
Figure 23
•
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 (code
6335919) is MANDATORY.
Using the humidifier kit
•
Lift the lid (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 (ref. C) 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.
Figure 24: the humidifier kit.
•
Connect a voltmeter as indicated and adjust, using
potentiometer p5 (ref. 1). The output signal must be equal
to 880 mV.
•
Next, inject the calibration gas at a flow rate of 30 l/h
(refer to paragraph Indications for calibrating the CTX
300 SC, on page 29).
•
Wait for the signal to stabilize and adjust the signal with
the sensitivity potentiometer p6 (ref. 2).
Figure 25
To detector
To standard gas
cylinder
(gas input)
(B) Filter
(A) Lid
(C) Gas input
pipe
(D) « Cristal » tubes.
Length: 0.5 m