TELEDYNE OLDHAM SIMTRONICS CTX 300, Руководство пользователя, Страница: 19 / 40

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
NP300GB
Rev.O.0
15
•
Adjust the sensitivity by using the sensitivity
potentiometer located on the sensor pack (rep. 1).
•
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.
•
Calibration is complete.
5.1.2.2 2
nd
case:
CTX 300 without display (except for O
2
et SC)
•
The sensor is operating.
•
Verify that the sensor is located in a clean-air
environment. Use the calibration kit and follow all
recommendations.
•
Connect a voltmeter to the AF+ and AF- terminals
(caliber mV/DC).
Figure 18
•
Wait for the signal to stabilize and adjust the zero by
using the ZERO potentiometer located on the sensor
pack (Figure 19, ref. 2). The output signal should be
0 mV.
•
Now inject the recommended test gas at a flow rate
of 30 l/h. Use the calibration kit and follow all
recommendations.
•
Wait until the signal has stabilized.
Figure 19
•
Read the mV value on the voltmeter (Figure 18), with the full scale at 1600 mV.
Calculate the value to be read as a function of your test gas.
•
Adjust the displayed value using the potentiometer (Figure 19, rep.1).
Example
-
CO sensor.
-
Scale 0-300 ppm.
-
Standard gas concentration: 100 ppm.
-
Reading: 533 mV.
•
Shut off the calibration gas injection.
•
Withdraw the gas injection pipe.
•
Then wait and check that the scale has returned to zero. Otherwise, repeat the entire
procedure.