MSA PrimaX IR, Руководство по эксплуатации

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PrimaX® IR
27
Maintenance
GB
5 Maintenance
5.1 General
WARNING!
Before working on the device, turn off the power and secure against restart.
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 hazardous environments. If the troubleshooting
guides in chapters 5.2 and 5.3 do not alleviate the problem, contact your MSA representative.
5.2 Troubleshooting
The 4-20 mA output provides a limited set of information for diagnostic purposes. Additional trouble-
shooting steps are outlined below.
General Troubleshooting Guide
Indication Action
Sensor IR source does not flash
Verify sensor and facility wiring according to the installation
section and then reapply power
Sensor IR source is flashing but no 4-
20mA signal. Verify sensor and facility wiring according to the installation
section and then reapply power.
FAULT mA output
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.
OBSCURATION mA output
Verify optical path is not obscured or perform the cleaning
procedure below.
Elevated gas reading when no gas is
expected to be present
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 calibration.
Unstable 4 mA signal after power on and
warm up
Verify DC voltage supply is between 18 - 32 VDC. Total
voltage, including any AC components, must be less than
32 VDC.
If power supply is within 18 - 32 VDC, check for noise on
the input power line. Use of an external filter may be
required in this case.
mA output current does not change when
gas is applied
Verify that gas flow path is unobstructed. Visually inspect
the gas inlets and the regulator.
Verify that you are not in calibration mode or any of the
defined mA output levels shown in chapter 4.1.
Verify that the device is not in Fixed Current Mode
(Commanded via HART).