Oldham ctx 300, Руководство пользователя

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28 CTX 300
User manual
■
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 45).
■
Wait for the signal to stabilize and
adjust the signal with the sensitivity
potentiometer p6 (ref. 2).
The output signal should be:
Figure 25
U = 880 mV + 3520 mV x Cal gas concentration
Sensor measurement range
Example
Sensor measure
(% of full range) Output signal
(mV)
0 880
50 2 640
100 4 400
■
Stop injecting the calibration gas.
■
Verify that the reading returns to zero
(880 mV). If it does not, repeat the
entire procedure.
■
Calibration is complete.
■
Flip the switch (ref. 1) into the MES
(Measure) position.
Figure 26
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