TELEDYNE OLDHAM SIMTRONICS CTX 300, Руководство пользователя, Страница: 20 / 40

CTX 300
ANALOGIC GAS DETECTOR
USER MANUAL
16 NP300GB
Revision O.0
5.1.3 CTX 300 calibration for O2
This sensor is an
Oxygen type.
5.1.3.1 1st case: CTX 300 O2 with display
•
See paragraph 1
st
case: CTX 300 with display, on
page 14. Proceed only with adjusting sensitivity (rep.
1) by injection of test gas.
Figure 20
5.1.3.2 2
nd
case:
CTX 300 O2 without display screen nor LED
•
See paragraph 2
nd
case: CTX 300 without display on
page 15. Proceed only with adjusting sensitivity (rep.
1) by injection of test gas.
Signal value mV:
-
1600 mV for full scale, means 30 % O
2
.
-
1115 mV for 20.9 % O
2
.
-
0 mV for 0% O
2
.
Figure 21
Note: the signal sent from the CTX300 (toxic or oxygen)
sensor to the control unit can be measured on the main circuit
by connecting a millivoltmeter to the pins designed for this
purpose (Figure 22).
-
400 mV corresponds to 4 mA.
-
2000 mV corresponds to 20 mA.
Figure 22