Table 3: Ir400 Without Hart Option; Table 4: Ir400 With Hart Option - General Monitors IR400 Manual

General Monitors configures the IR400 with three calibration input options: magnetic switch
(default), manual solenoid, and automatic remote gas calibration device (ARGC). To use the
manual solenoid or ARGC, purchase a factory configured IR400 or change the calibration input
via Modbus or HART.
4.1.5 IR400 Analog Output (AO) Interpretation
Current Level (mA)
0
1.5
2
4 – 20
20.1 – 21.7
Current Level (mA)
0
1.25
1.5
2
3.5
4 – 20
20.1 – 21.7
Meaning
Startup mode and critical fault for non HART unit
Zero, Calibration and Gas Check Mode
Non critical fault
0 – 100% LEL or % by Volume
Over range

Table 3: IR400 without HART Option

Meaning
Startup mode and critical fault for non HART unit
Startup mode and critical fault if current range is low
Zero, Calibration and Gas Check Mode
Non critical fault
All faults and startup if unit is configured with current
range set to "high"
0 – 100% LEL or % by volume
Over range

Table 4: IR400 with HART Option

19
Model IR400