961 Datasheet, PDF (11/16 Pages) Magnetrol International, Inc. – SIL Safety Manual for Echotel Model 961/962

51-650 Echotel SIL Safety Manual
5.8.1 Diagnostics
Model 961/962 has a unique diagnostics feature to assist in
troubleshooting should a failure occur. A microprocessor in
the electronics continuously monitors all self-test data.
Should a fault occur, the microprocessor can determine
whether the malfunction is due to the electronics, transducer,
piezoelectric crystals, or the presence of environmental noise.
Table 4
Diagnostic Push Buttons and LED Indications
Electronics Version
Push Button
LED
961 with 5 amp relays
LEVEL TEST
FAULT
961 with current shift
LOOP TEST
FAULT
962 with 5 amp relays
LEVEL TEST
FAULT
962 with 5 amp relays
LOOP TEST
16 mA
Table 4 shows the push buttons and LEDs used for each
version of the 961/962 for diagnostic troubleshooting:
5.8.2 Troubleshooting
Model 961/962 has a diagnostic push button and Fault LED
used to assist in troubleshooting the switch (see Table 5).
Table 5
Troubleshooting Faults and Corrective Actions
Flashes Fault
Action
1 flash
Indicates a problem with either the
transducer, piezoelectric crystals,
or the interconnection wiring.
Check wiring inside the housing to
make sure that all wires are
secure in their respective terminal
blocks. Make sure that all the
terminal block screws are fully
tightened. If all wires are secure
then contact the factory. Replace
transducer if needed. Refer to
Section 3.8 of the Installation and
Operating Manual for proper
replacement part numbers.
2 flashes
Indicates a problem with one of
the electronics boards.
Contact the factory for a replace-
ment electronics module. Refer
Section 3.8 of the Installation and
Operating Manual for spare elec-
tronics modules part numbers.
3 flashes
Indicates excessive levels of
environmental noise.
Check if any source may be caus-
ing the interference, such as VFD
(variable frequency drive), radiated
electrical interference (two-way
radio transceiver) or mechanical
vibration from nearby source.
Refer to Section 3.7 of the Echotel Ultrasonic Single and
Dual Point Level Switches Installation and Operating Manual
(Bulletin 51.646) for troubleshooting device errors.
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