Analytical Industries GPR-1535 GB Trace PPM Oxygen Transmitter - Manual (Page 11)

Advanced Instruments Inc.
11
Span Gas Preparation
Caution: Do not contaminate the span gas cylinder when connecting the regulator. Bleed the air filled regulator (faster and
more reliable than simply flowing the span gas) before attempting the initial calibration of the instrument.
Required components:
¾ Certified span gas cylinder with an oxygen concentration, balance nitrogen, approximating 80% of the full scale range above
the intended measuring range.
¾ Regulator to reduce pressure to between 5 and 30 psig.
¾ Flow meter to set the flow between 1-5 SCFH,
¾ 2 lengths of 1/8” dia. metal tubing measuring 4-6 ft. in length.
¾ Suitable fittings and 1/8” dia. metal tubing to connect the regulator to the flow meter inlet
¾ Suitable fitting and 1/8” dia. metal tubing to connect from the flow meter vent to tube fitting you designate for SAMPLE IN.
Procedure:
1. With the span gas cylinder valve closed, install the regulator on the cylinder.
2. Open the regulator’s exit valve and partially open the pressure regulator’s control knob.
3. Open slightly the cylinder valve.
4. Loosen the nut connecting the regulator to the cylinder and bleed the pressure regulator.
5. Retighten the nut connecting the regulator to the cylinder
6. Adjust the regulator exit valve and slowly bleed the pressure regulator.
7. Open the cylinder valve completely.
8. Set the pressure between 5-30 psig using the pressure regulator’s control knob.
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 transmitter 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
Note: The transmitter display defaults to the sampling mode when 30 seconds elapses without user interface.
3.3 PPM
AUTO SAMPLING
10 PPM RANGE
24.5 C 100 KPA