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Section : 8 Troubleshooting
8.1
General Guidelines
This section informs the user how to quickly resolve an operational problem with the system.
During any troubleshooting phase, it will save time if the operator can firstly determine the
problem. Either it is related to the process controller, process sensor, or some external source.
Therefore, this section is organized from the approach of excluding any likely external sources,
isolating the controller and finally isolating the sensor. If these procedures still do not resolve
the operational problems, any results noted here will be helpful when discussing the problem
with the factory technical support group.
•
Verify the proper power input is present (12 - 24VDC). Ensure the loads on the 4~20mA
outputs do not exceed the limit (see section 3).
•
Do not put sensor cables or instrument 4~20 mA output wires in the same conduit that
contains AC power wires. AC power wires should be run in a separate conduit to prevent
electrical noise from contacting with the instrumentation signals. Check for possible
ground loops. High frequency sources of electrical noise may cause abrupt behavior in
extreme conditions. If readings are very erratic after wiring has been checked, check for a
possible AC ground loop, filter value, calibration k-factors or by temporarily moving the
rotor of sensor with finger to check frequency and flow rate values displaying or not.
Section : 9 Maintenance
9.1
General Guidelines
Controller requires little to no maintenance for its smooth operation. Routine maintenance
will be recommended for its ideal operation. Calibration for this controller should be checked
periodically for measurement check. Calibration method is mentioned in (section: 7.1.8).
9.2
Maintenance Parts
Maintenance / replacement parts for controller are available as per requirement. For any
requirement of parts kindly contact the AT Systems representative. Damaged e
lectronic PCB’s
, PCB components, buttons, connectors and LED can also be replaced if required. AT System
’s
corresponding personnel will remain in contact until the issue is resolved.
9.3
Panel Mounting Parts
Controller
is already provided with high quality steel made side clamp for fixing with panel
plate. For panel mounting procedure kindly refer to (section: 2.1). Side clamp plate can be
ordered to AT Systems separately if required.
