Oxygen Analyzer | Installation |
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4–20 mA DC % Range: Current increases linearly with increasing oxygen, from 4 mA at 0 ppm to 20 mA at full scale ppm. (Full scale = 100% of programmable range.)
4–20 mA dc Range ID: 8 mA = Low Range, 12 mA = Medium Range, 16 mA = High Range, 20 mA = 100ppm.
Table 3-1: Analog Output Connections
Pin Function
3+ Range ID, 4-20 mA, floating
4 – Range ID, 4-20 mA, floating
5 + % Range, 4-20 mA, floating
6 – % Range, 4-20 mA, floating
8 + Range ID, 0-1 V dc
23 – Range ID, 0-1 V dc, negative ground 24 + % Range, 0-1 V dc
7 – % Range, 0-1 V dc, negative ground
Alarm Relays: The nine alarm-circuit connector pins connect to the internal alarm relay contacts. Each set of three pins provides one set of Form C relay contacts. Each relay has both normally open and normally closed contact connections. The contact connections are shown in Table 3-2. They are capable of switching up to 3 amperes at 250 VAC into a resistive load. The connectors are:
Threshold Alarm 1:
•Can be configured as high (actuates when concentration is above threshold), or low (actuates when concentration is below threshold).
•Can be configured as failsafe or nonfailsafe.
•Can be configured as latching or nonlatching.
•Can be configured out (defeated).
