General Monitors S216A, Инструкция по эксплуатации

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This chapter explains what to do upon
receipt of equipment, what sensor location
considerations need to be made, installation
instructions, terminal connections, initial
application of power and how to maintain
the explosion-proof integrity of the Model
S216A.
3.1 Re ceipt of Equip ment
All equipment shipped by General Monitors
is packed in shock absorbing containers
which provide considerable protection
against physical damage. The contents
should be carefully removed and checked
against the packing slip. If any damage has
occurred or if there is any discrepancy in the
order, notify General Monitors as soon as
possible. All subsequent correspondence
with General Monitors must specify the
equipment part and serial numbers. Each
Model S216A is completely checked by the
factory. However, a complete check-out is
necessary upon initial installation and start
up to ensure system integrity.
3.2
Sen sor Lo ca tion Con sid era -
tions
There are no standard rules for sensor
placement since the optimum sensor
location is different for each application.
The customer must evaluate conditions at
the facility to make this determination.
Generally, the Model S216A Smart Sensor
should be easily accessible for calibration
checks. The sensor assembly should be
mounted pointing down to prevent water
build-up on the sensor head. The sensor
assembly should not be placed where it may
be coated by contaminating substances.
Although the Model S216A is RFI resistant,
it should not be mounted in close proximity
to radio transmitters or similar equipment.
Other considerations when placing sensors
should include:
l
Locate the Model S216A where
prevailing air currents contain the
maximum concentration of gas.
l
Locate the Model S216A near possible
sources of gas leaks.
l
Observe the Model S216A’s temperature
specification and locate the unit away
from concentrated sources of heat.
l
Sensor Assemblies should be mounted in
an area that is as free from wind, dust,
water, shock, and vibration as possible.
See Appendix, section 5.1.4 for the
environmental specifications of the unit.
Sensors may be adversely affected by
prolonged exposure to certain materials.
Loss of sensitivity or corrosion may be
gradual if such materials are present in low
concentrations, or it may be rapid at high
concentrations. The more important
materials adversely affecting sensors are:
l
Silicones (often contained in greases and
aerosols). Silicones do not chemically
attack the sensor, they coat it and reduce
or inhibit its response to H
2
S gas.
l
Halides . . . compounds containing
fluorine, chlorine, bromine, or iodine.
l
Caustic and acidic liquids and vapors.
The presence of poisons and contaminants in
an area does not necessarily preclude the use
of a Model S216A Enhanced Smart Sensor.
The feasibility of using a sensor in such
areas must be determined by an analysis of
the specific factors in each application and
General Monitors should be consulted
before attempting any such installation.
7
Model S216A Installation