Analytical Industries GPR-2600 Series Oxygen Analyzer - Manual (Page 21)

Advanced Instruments Inc.
21
Span Gas Preparation
The analyzer must be calibrated periodically. See the Calibration section below for recommendations. 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 30 psig.
¾ Flow meter to set the flow between 1 SCFH,
¾ Suitable fittings and 1/8” dia. 4-6 ft. in length of metal tubing to connect the regulator to the flow meter inlet
¾ Suitable fitting and 1/8” dia. 4-6 ft. in length of metal tubing to connect from the flow meter vent to tube fitting designated
SAMPLE IN on the GPR-2600.
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.
9. Caution: Do not exceed the recommended flow rate. Excessive flow rate could cause the backpressure on the sensor
and may result in erroneous readings and permanent damage to the sensor.
Establishing Power to the Electronics:
Once the power to the electronics is established, the digital display responds instantaneously. When power is applied, the
analyzer performs several diagnostic system status checks termed “SYSTEM SELF TEST” as illustrated below:
System Self Test
CPU
Memory
RTC
Analog
OK
OK
OK
OK
GPR Series Oxygen Analyzer
Software Version X.XX
Advanced Instruments
2855 Metropolitan Place
Pomona, CA 91767
Tel: 909-392-6900
Fax: 909-392-3665
e-mail:
[email protected]