Advanced Instruments Inc.
5.
Twist the upper section of the sensor housing 90 degree and then pull it away.
6.
Remove old sensor (if previously installed).
7.
Remove the new sensor from the package (use a pair of scissors to cut the bag, do not use hands to tear the
bag)
8.
Remove the two red ribbons from the two gold ring contact plate at the back of the sensor.
9.
Insert the sensor into the upper section of the sensor housing with the contact plate facing toward the two
gold pins of the sensor housing. Hold the sensor and the housing in your hand while keeping the sensor
pushed against the sensor housing.
10.
Check the oxygen reading; it should reach close to 20.0% (+7% -4%) indicating that the sensor has proper
signal output. At this time perform air calibration.
11.
After air calibration, insert the sensor into the bottom section of the sensor housing, place the upper section
of the sensor housing and twist it 90 degree until it fits on the lower section of the sensor housing. Tighten
the nut (3/4 turn after figure tight).
Span Gas Preparation
Avoid contamination of the span gas cylinder when connecting the pressure regulator. Bleed the air filled regulator for
a couple of minutes before closing the vent valve of the pressure regulator (faster and more reliable method of purging
the regulator than simply allowing the span gas to flow through the regulator and the span gas line).
The following components/tools are required for setting a span gas cylinder:
1.
Certified span gas cylinder with an oxygen concentration, balance nitrogen, approximating 80% of the full scale
range above the intended measuring range.
2.
Use a Pressure Regulator to reduce span gas pressure to between 5 and 30 psig.
3.
Use flow meter (only if the analyzer is not equipped with a flow meter) and set the flow between 1-2 SCFH.
4.
Use suitable fittings and 1/8” dia. metal tubing to connect the regulator to the inlet of the analyzer.
Procedure of Setting up a Span Gas Cylinder
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.
Caution: Do not exceed the recommended pressure. Excessive pressure would make flow adjustment more difficult.
Remove the two red ribbons
from sensor PCB
15
