Analytical Industries GPR-2500 S Oxygen Analyzer - Manual (Page 15)

15
Installing the Oxygen Sensor
The GPR-2500S ppm Ambient Oxygen Monitor 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 monitor. If the sensor has not been installed
at the factory, it will be necessary to install the sensor in
the field.
Caution: All monitors must be calibrated once the
installation has been completed and periodically thereafter
as described below. Following the initial installation and
calibration, allow the monitors 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 monitors 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 threaded hole tapped in the bottom of the enclosure and finger tighten plus
one half (1/2) turn to ensure a good seal from the o-ring affixed to the sensor.
6. Remove the shorting device (looped wire) from the receptacle located at the rear of the sensor. Minimize the
time the sensor is exposed to ambient air.