Analytical Industries GPR-2500 A Oxygen Analyzer - Manual (Page 12)

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¾ Pressure & Flow: As described above.
¾ Moisture & Particulates: Prevent water and/or particulates from entering the sample system. They can clog the
tubing and damage the optional components such as pumps, scrubbers or sensors. Installation of a suitable
coalescing or particulate filter is required to remove condensation, moisture and/or particulates from the
sample gas to prevent erroneous analysis readings and damage to the sensor or optional components. Consult
the factory for recommendations concerning the proper selection and installation of components.
¾ Contaminants: A gas scrubber and flow indicator with integral metering valve are required upstream of the
transmitter to remove interfering gases such as oxides of sulfur and nitrogen or hydrogen sulfide that can
produce false readings and reduce the expected life of the sensor. Installation of a suitable scrubber is required
to remove the contaminant from the sample gas to prevent erroneous analysis readings and damage to the
sensor or optional components. Consult the factory for recommendations concerning the proper selection and
installation of components.
¾ Gas connections: Inlet and outlet vent gas lines require 1/8” diameter tubing preferably metal.
¾ Power connection: Locate a source of AC power to meet area classification and to plug in the charging adapter.
¾ Zero calibration (required only for very low percentage range measurements).
¾ Span calibration – Users are responsible for certified span gas cylinder, regulator and flow control valve.
Mounting the Transmitter:
The GPR-2500A is housed in a 9Hx4Wx3.5”D NEMA4X rated
enclosure. This configuration is designed to be mounted
directly to any flat vertical surface, wall or bulkhead plate with
four (4) of the appropriate size screws. To facilitate servicing
the interior of the transmitters, position it approximately 5 feet
off ground level.
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. Locate the mounting holes cast into the enclosure.
3. Secure the enclosure to a vertical surface approximately 5
feet from the floor or a level accessible to service
personnel. This requires the user to supply four (4)
additional proper size screws and anchors.
4. 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.
5. 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.