Analytical Industries GPR-2500 A Oxygen Analyzer - Manual (Page 18)

18
Installing the Oxygen Sensor
The GPR-2500/2500MO ppm Oxygen Transmitter is normally equipped with an integral oxygen sensor. It has been
tested and calibrated by the manufacturer prior to shipment and are fully operational from the shipping container.
However, when the application requires a remote sensor (external to the electronics enclosure) or other special
circumstances, the oxygen sensor will be packaged separately and must be installed prior to operating the
transmitter. If the sensor has not been installed at the factory, it will be necessary to install the sensor in the field.
Note: All transmitters must be calibrated once the installation has been completed and periodically thereafter as
described below. Following the initial installation and calibration, allow the transmitters to stabilize for 24 hours and
calibrate with certified span gas.
Caution: DO NOT open the oxygen sensor. The sensor contains a corrosive liquid electrolyte that could be harmful
if touched or ingested, refer to the Material Safety Data Sheet contained in the Owner’s Manual appendix. Avoid
contact with any liquid or crystal type powder in or around the sensor or sensor housing, as either could be a form
of electrolyte. Leaking sensors should be disposed of in manner similar to that of a common battery in accordance
with local regulations.
Caution: Do not change the factory settings until instructed to do in this manual.
Integral Oxygen Sensor:
1. Remove the four (4) screws securing the top section of the enclosure, set them aside for reinstallation and
raise the hinged top section 180º
until it locks in place.
2. Caution: Do not remove or discard
the gaskets from either the enclosure
or junction box. Failure to reinstall
either gasket will void the NEMA 4
rating and RFI protection.
3. The transmitters design provides
protection from RFI that is
maintained by leaving specific mating
areas of the enclosure unpainted to
maintain conductivity the gasket, top
and bottom sections of the enclosure.
These unpainted areas are protected
by gaskets and contribute to
maintaining the NEMA 4 rating. Do
not paint these areas. Painting will
negate the RFI protection.
4. Remove the oxygen sensor from the
bag.
5. Screw the oxygen sensor into the
sensor flow housing, equipped with
elbows and tubing, finger tighten
plus one half (1/2) turn to ensure a
good seal from the o-ring affixed to
the sensor.