OPERATING MANUAL OXYGEN MONITORING SYSTEM
OMS 420
22
9.5
Service menu
Displays actual 6 lines from a scroll up/down list with measured (A/D converter) components information.
Press the “UP” or “DOWN” key and return back to main measuring menu by pressing “BACK”.
standard value
allowed deviation
O
2
cell
- 10 mV (with operation temperature and 21 % O
2
)
± 5 mV
O
2
heater
12 V (depending on flange temperature)
± 2 V
O
2
heater
1,3 A (heater current)
± 0,3 A
CO cell
5 mV (after warm-up and with fresh air )
± 10 mV
CO heater
7,5 V (depending on flange temperature)
-3,0 V…. + 1 V
CO heater
0,4 A (heater current)
± 0,1 A
Unit temperature
less then 160 °F (70 °C)
Typical mV-values for COe sensor:
O
2
= 3 %, CO = 200 ppm
Æ
98,0 mV
O
2
= 3 %, CO = 500 ppm
Æ
190,0 mV
O
2
= 10 %, CO = 200 ppm
Æ
32,0 mV
O
2
= 10 %, CO = 500 ppm
Æ
93,0 mV
If the system detects an error, the plain text meaning will be displayed after pressing “ERROR”
key
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