Model IR400
22
•
Remove the magnet and the LED will flash on for one second and off for one second to
indicate that the unit is attaining a zero value (
Zeroing
in the figure).
•
When the unit has finished zeroing, the LED will turn on and flash off quickly once per
second for 30 seconds (
Zero Complete
in Figure ).
•
NOTE:
If an error occurs during the zeroing/calibration sequence, the LED will flash on
and off rapidly (
Fault
).
4.2.3 Full Span Calibration
If a full span calibration is required, a zero calibration must first be performed to eliminate any
background gas fluctuation. When the zero calibration is complete, a full span calibration may
optionally be performed.
1.
Zero the Unit
. Apply the General Monitors magnet that was included with the unit to the
Zero Switch / LED for approximately three seconds. The LED in the switch will light to show
proper placement.
•
Remove the magnet and the LED will flash on for one second and off for one second to
indicate that the unit is attaining a zero value (
Zeroing
in the figure).
•
When the unit has finished zeroing, the LED will turn on and flash off quickly once per
second for 30 seconds (
Zero Complete
in Figure ).
•
NOTE:
If an error occurs during the zeroing/calibration sequence, the LED will flash on
and off rapidly (
Fault
).
2.
Return to Normal Operation or Start Calibration.
If the magnet is not applied again, the
unit will return to normal operation. To continue on and calibrate, apply the magnet again
and the unit will enter the calibration mode.
The LED will flash off quickly once every half-second while the unit is waiting for gas to be
applied (Waiting for Gas).
3.
Apply Gas
. Apply a 50% LEL gas using a Gas Check Kit with portable purge calibrator
equipment (or 50% by volume of the gas being detected in nitrogen for units designed for
monitoring 0 to 100% by volume).
•
When the unit detects the gas, the LED will flash on for a half second every one and
one-half seconds (
Gas Present
).
•
If the unit does not detect the gas, the LED will flash off quickly once every half-second
while the unit is still waiting for gas to be applied (
No Gas Error
).
•
Once calibration has been completed, the LED will turn on and flash off once every
second (
Calibration Complete
).
4.
Return to Normal Operation
. Remove the gas and the unit will return to normal operation
once the gas has fallen below 5% of full scale.
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 ...
