Dräger REGARD-1 - Oxygen Alarm Thresholds (0-25%); Setting Alarm Thresholds (SE Ex)

Configuration and calibration
Issue 5 - June 2005 Page 45 of 64 Pages
For oxygen deficiency and oxygen enrichment alarms, use this table to determine alarm
thresholds for a 0 – 25% range:
Alarm threshold Transmitter signal (mA) Voltage across
TP1 & TP2 (V)
17% 14.9 2.98
18% 15.5 3.10
19% 16.2 3.24
20% 16.8 3.36
21% (Normal reading)
22% 18.1 3.62
23% 18.7 3.74
24% 19.4 3.88
Setting alarm thresholds on SE Ex units
Use the potentiometers marked A1, A2 and A3 on the main circuit board to set the
alarm thresholds:
A
1
A
2
A
3