Brasch GDCP-A, Инструкция по эксплуатации

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Section 4
Maintenance
4-1 Introduction
4-1.1 The following paragraphs cover the areas of the GDCP-A system that require
periodic attention to ensure continued optimal performance. The areas included
are sensors lifetimes, fuses and sensor sensitivity testing.
4-2 Maintenance
4-2.1 Sensors
The GDCP-A requires very little maintenance. The sensors used in the
transmitters have a two year lifetime for the nitrogen dioxide transmitter while the
sensor in the CO transmitter is rated at five years. Unless the sensors are
exposed to abnormal levels of gases, or fumes from materials such as paints,
cleaning fluids and the like, the sensors should easily work for the rated periods.
After the sensors reach their end-of-life periods, they can be replaced with a
factory calibrated P.C. board/sensor assembly. Once replaced, the transmitters
should function for the rated life times of the new sensors without problems.
4-2.2 Fuses
The GDCP-A and the transmitters are protected by fuses of various ratings.
These fuses are of the TR5 type and simply plug into a fuse holder on the
associated P.C. boards. These fuses can fail for various reasons. Power supply
spikes that occur during, and after, power losses can sometimes stress the fuses
and cause them to fail. This is no fault of the equipment, and, in most cases,
replacing the fuse solves the problem.
The fuses can also fail when large currents, caused by a failed component,
passes through them. In this case, the replacement fuse will most likely fail also.
If you encounter this situation, please contact your nearest Brasch
distributor for help.
Each GDCP-A system ships with a limited number of replacements fuses. If you
find that you require a larger number of fuses, please contact your distributor to
order a factory fuse kit. This kit includes 10 to 20 each of the various sizes of
fuses required for the system.
Repeated fuse failures may be an indication of high service voltage levels,
or a component in the GDCP-A system that is on the verge of failure.
Contact your distributor to discuss this condition.
4.2.3 Sensitivity Testing
Some localities may require you to determine that the sensors are remaining
accurate and calibrated. If you are required to perform these tests, please
contact your distributor, or Brasch Manufacturing directly, for options on how
these tests may be accomplished.