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

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3. Review Span Gas Preparation section below – regulate the pressure and control the flow rate as directed.
4. Caution: When ambient monitoring of oxygen deficiency in a confined space or room do not calibrate the unit
in the atmosphere to be monitored. Use a certified span gas of a known oxygen concentration approximating
20.9% oxygen balance nitrogen or clean compressed air.
5. Apply a little lubricant to the o-ring, a dry o-ring can make insertion difficult, of the Calibration Flow Through
Adapter Assembly, A-2344.
6. Insert the flow through adapter into the throat of the sensor.
7. Connect the 1/8” ID Tygon tubing from the flow meter vent to Item #4 Connector, Barbed Tubing.
8. Proceed to Span Calibration section.
Legend:
1. CONN-1014 Sensor Cable
2. GPR-11-32-4R Oxygen Sensor
3. A-2079 Bracket Sensor Mounting
4. FITN-1029 Connector, Barbed Tubing
5. A-2344 Calibration Flow Through Adapter
(Calibration use only)
6. A-2781 Nut Sensor Retaining
Establishing Power to the Electronics
Once the two wires of the shielded cable are properly
connected to the terminals inside the junction box as described
above, connect the other end of the two wires to a suitable 12-
36V DC power supply with negative ground such as a PLC, DCS,
etc.
The digital display responds instantaneously. When power is
applied, the monitor performs several diagnostic system status
checks termed “START-UP TEST” as illustrated below:
START-UP TEST
ELECTRONICS – PASS
LOOP POWER – PASS
TEMP SENSOR – PASS
BAROMETRIC SENSOR – PASS
REV. 1.61