Model IR400
28
Table showing the fault conditions and corrective action required:
HART
non-HART
F0
Bits 3 & 14
2mA for 30s
then 1.25mA
2mA for 30s
then 0mA
Gas Concentration is
Excessively Negative
1)Fouling of the detector windows or beam
path is excessive and requires attention
1) Clean detector beam path and windows.
F1
Bits 0 & 1
2
2
Gas Concentration is
Negative
1) Detector windows or beam path are
beginning to be obscurred.
1) Clean detector beam path and windows.
1) Cal bottle empty and time-out occurred 1) Obtained filled CAL bottle and re-CAL.
2) Failed to remove gas at end of CAL and
time-out occurred.
2) Remove gas when directed.
3a) Check CAL cup for proper seating on
unit.
3b) Check CAL cup seal and replace CAL
cup if damaged.
4) Attempted to CAL with too much wind
resulting in unstable signal.
4) Calibrate at a much less windy time or
shield the unit and CAL cup from the wind.
1) Detector windows or beam path are
blocked by dirt, spider webbing or other
foreign matter.
1) Clean detector beam path and windows.
2) Detector or source failure.
2) The IR400 must be returned to the factory
or authorized service center for repair.
1) Incorrect communications set-up.
1) Ensure baud rate, data format and
address matches at both the IR400 and the
bus master.
2) Communications wiring open.
2) Check and correct wiring.
3) Communications wiring shorted.
3) Check and correct wiring.
F5
Bit 4
1.25
0
CAL Wire (brown)
Shorted
1) CAL Wire (brown) not in connector
1) Check and ensure proper connection of
wire to board connector
1) Power supply not outputing greater than
20VDC.
1) Check the supply voltage and replace
power supply if necessary
2) Voltage loss due to wiring.
2) Check the supply voltage at the IR400
field and adjust supply to +24VDC at the
IR400 or replace wiring with larger gauge.
1) Internal memory glitch
1) Cycle power, wait 2 minutes, if the fault
clears then check all menu settings and
recalibrate the IR400.
2) Internal error with the electronics.
2) Call your local General Monitors
representative for advice.
F8
Bit 7
1.25
0
Failed to Zero
1) Unstable signal due to gas present.
1) Ensure clean air is available for zeroing or
provide zero air to the IR400 during zeroing.
Bit 6
FAULT
CODE
DESCRIPTION
MODBUS FAULT
FLAG REGISTER
2
F2
Failed to Complete
Calibration
CORRECTIVE ACTION
ANALOG OUTPUT (mA)
2mA for 30s
then 0mA
1.25
0
1.25
0
3) Leaky CAL cup resulting in unstable
signal.
POSSIBLE CAUSE
1.25
F9
CAL Check Period
Exceeded
F6
Low Supply Voltage
1.25
F7
F3
Beam Block
2mA for 30s
then 1.25mA
F4
Communications Fault
(Applies to IR4000M
display only)
1) Test gas still present after gas check
completed.
1) Remove the gas
0
Bit 2
Bit 5
Bit 8
0
Bits 9 - 13 & 15
1.25
0
Electronics Error
Summary of Contents for IR400
Page 2: ......
Page 15: ...Model IR400 11 Figure 5b IR400 Mounting Dimensions with a European Box ...
Page 20: ...Model IR400 16 Figure 7 Wiring Diagram from IR400 to Control Equipment ...
Page 41: ...Model IR400 37 9 6 Engineering Documentation ...
Page 45: ...Model IR400 HART Field Device Specification for Point IR Gas Detector ...
Page 78: ...Model IR400 Infrared Point Detector for Hydrocarbon Gas Applications Modbus programming guide ...
