Maintenance; General; Troubleshooting - MSA PrimaX IR Manuel D'utilisation

MSA
5

Maintenance

5.1

General

WARNING
Before working on the device, turn off the power and secure against re-
start.
FAILURE TO FOLLOW THIS WARNING CAN RESULT IN SERIOUS
INJURY OR LOSS OF LIFE.
There are NO field repairable internal components for this device. Do not attempt
to open the enclosure of the device, it is factory sealed for protection from hazard-
ous environments. If the troubleshooting guides in chapters 5.2 and 5.3 do not al-
leviate the problem, contact your MSA representative.
5.2

Troubleshooting

The 4-20 mA output provides a limited set of information for diagnostic purposes.
Additional troubleshooting steps are outlined below.
General Troubleshooting Guide
Indication
Sensor IR source does not flash Verify sensor and facility wiring according to the
Sensor IR source is flashing
but no 4-20mA signal.
FAULT mA output
OBSCURATION mA output
Elevated gas reading when no
gas is expected to be present
US
Action
installation section and then reapply power
Verify sensor and facility wiring according to the
installation section and then reapply power.
Check power supply and restart.
Check to ensure that the calibration cap was
not left on the sensor for an extended time.
If an Underrange error is indicated via the
HART interface, perform a zero calibration.
Verify optical path is not obscured or perform
the cleaning procedure below.
Clean the optical window and mirror using the
cleaning procedure below.
Apply zero gas to see if reading drops to zero.
If it does not, then perform Zero and Span cali-
bration.
PrimaX IR
Maintenance
31