Part Number 1460005
Revision C
Wiring connections
Red wire:
18 to 32 VDC
Black wire: DC Common
Blue wire:
4 to 20 mA output
White wire: Smart Calibration Wire (data wire)
Earth Ground: 10-32 Green Ground Screw on
IR
Evolution cap, see figure 1.
Wire sizing:
0 to 500 feet, recommended wire gauge size 16 AWG (rated at least 8°C above max. ambient)
501 to 1000 feet, recommended wire gauge size 14 AWG (rated at least 8°C above max. ambient)
Shielded cable is recommended. Wiring should be installed in metal conduit with no other cabling in the
same conduit.
Warm-up
When power is applied to the detector, it enters a one (1) minute warm-up mode. The output current will be
4.0 mA during the warm up time period. At the end of the warm-up period with no faults present, the
detector automatically enters the normal operating mode (4-20mA). If a fault is present after warm-up, the
detector current output will indicate a fault. See the following chart for fault code status.
Normal Operation
In the normal operating mode, the 4 to 20 mA signal levels correspond to the detected gas concentration.
The detector continuously checks for system faults or initiation of calibration and automatically changes to
the appropriate mode.
The 4 to 20 mA output of the SEC 5000
IR
Evolution is a non-isolated current source.
Current Output and Corresponding Status
Current Output
Status
.
0.6 mA
Unit Fault
4.0 mA
Unit warm up
1.0 mA
Optics fault
1.2 mA
Zero drift fault
1.6 mA
Calibration fault
2.0 mA
Unit spanning
2.2 mA
Unit zeroing
2.4 mA Reference Channel Fault
2.6 mA
Analytical Channel Fault
4.0 mA
Zero gas level (0% F.S.)
5.6 mA
(10% Full Scale)
8.0 mA
(25% Full Scale)
12 mA
(50% Full Scale)
16 mA
(75% Full Scale)
20 mA
Full scale (100% F.S.)
>20 mA
Over-range (> 100% F.S.)
CAUTION: HIGH OFF-SCALE READINGS
(READINGS GREATER THAN 20mA) MAY
INDICATE AN EXPLOSIVE CONCENTRATION
Содержание SEC 3000
Страница 15: ...Doc 1460003 Rev A Operation Manual SEC 3000 Electro Chemical Gas Sensor Page 12 of 13 ...
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