60
O&M Manual
Rev-J (8/17)
Part 9 – Troubleshooting
9.1
General
The information included in this section is intended to be used in an
attempt to quickly resolve an operational problem with the system.
During any troubleshooting process, it will save the most time if the
operator can first determine if the problem is related to the
analyzer, sensor, or some external source. Therefore, this section
is organized from the approach of excluding any likely external
sources, isolating the analyzer, and finally isolating the sensor. If
these procedures still do not resolve the operational problems, any
results the operator may have noted here will be very helpful when
discussing the problem with the factory technical support group.
9.2
External Sources of Problems
To begin this process, review the connections of the system to all
external connections.
1. Verify the analyzer is earth grounded. For all configurations of
the analyzer, an earth ground connection MUST be present for
the shielding systems in the electronics to be active. Grounded
conduit provides no earth connection to the plastic enclosure, so
an earth ground wiring connection must be made at the power
input terminal strip. Use the special “shield terminal” stub on the
power supply board for optimum sensor cable shield grounding.
2. Verify the proper power input is present (115/230 VAC.)
3. Verify the loads on any 4-20 mA outputs do not exceed the
limits in the Instrument Specifications (500 Ohms each for
analyzer.) During troubleshooting, it is many times helpful to
disconnect all these outputs and place wire-shorts across the
terminals in the instrument to isolate the system and evaluate
any problems which may be coming down the analog output
connections.
4. Do not run sensor cables or analog output wiring in the same
conduits as power wiring. If low voltage signal cables must
come near power wiring, cross them at 90° to minimize
coupling.
