Oldham MX 52, Руководство по пусконаладке, эксплуатации и техническому обслуживанию

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52
NOTE
Our company is at your disposal to supply you with standard gas or an annual surveillance contract
(preventive maintenance). Under this contract, our specialists guarantee the perfect operation of
your installation. No adjustment is to be made between OLDHAM servicing operations. This avoids
any additional workload for the user’s maintenance services.
6.2.
Failures: causes and remedies
FAILURES CAUSES REMEDIES
Display channel not lit up and
no indicator light on. On/Off switch in the Off
position. Set the switch to the On
position (item A, Fig. 26).
Problem with mains power
supply or DC power supply
(24 V DC). Check the supply voltages on
input to the MX52 unit and, if
necessary, check in the
electric power supply
cabinets.
Mains fuses blown. Replace the mains fuses (see
item A, Fig. 5).
DC power (24 V DC) input
fuses blown. Replace the 24 V DC fuses
located at the back of the
MX52 unit (item B, Fig. 5).
+24 V DC internal protection
fuse blown. Replace the +24 V DC fuse
located on the power board
(item C, Fig. 5).
CAUTION
When replacing a fuse, it is mandatory to comply with the
required type and rating.
Fault indicator light on (in
steady mode). Faulty electrical connections
on the telemetry line (wires
and detector).
Check the connections on the
MX52 terminal block and the
detector terminal block.
Check that there is no short
circuit or break in the wires
on the telemetry cable.
Faulty detector. Repair or replace the detector
(see internal electronics or
cell).
The type of detector does not
match the measuring channel
configuration. Connect the correct type of
detector with the
corresponding measuring
channel.
CAUTION
The measuring channel or line
may be damaged.
Negative offset too great
(more than 20% of measuring
scale).
Perform calibration on the
detector and, then, on the unit,
if necessary. If the problem
persists, the cell must be
replaced.