Analytical Industries GPR-2500 Series Oxygen Transmitter - 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-2500/2500MO enclosure is 4”Wx9”Hx3”D configuration is
designed to be mounted directly to any flat vertical surface, wall or
bulkhead plate with the appropriate screws. To facilitate servicing
the interior of the transmitters, position it approximately 5 feet off
the floor.
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 bottom section of the
enclosure and the black sensor. Orient the enclosure by locating
the sensor at six (6) o’clock.
3. Secure the bottom section of 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.
6. As described below the power connection is made through the junction box on the left side of the enclosure.