Oldham ctx 300 - Page 28

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 53).
■ Wait for the signal to stabilize and
adjust the signal with the sensitivity
potentiometer p6 (ref. 2).
The output signal should be:
Figure 31
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 32