INITIATION OF SAMPLE FLOW TO
THE ANALYZER
Metering Valve
3-way Selector Valve
(Sample/Span/Off)
1.
Leak check the newly installed sample gas line. Rotate the 3-WAY SELECTOR VALVE to the
OFF position. Then pressurize the sample line to ~ 20 to 100 psig. Use a squeeze bottle of
SNOOP
®
or equivalent product and leak check every fitting from the SAMPLE GAS INLET
PORT back to the sample tap (note: bubble formations indicate a leak). DO NOT USE the
spray bottle as this technique produces bubbles and does not achieve the best results.
Metering Valve
This valve is located at the center of the 3-WAY SELECTOR VALVE and used for adjusting both sample
and span gas flow rates. Turning the knob clockwise decreases the flow, while rotating it counter-
clockwise increases the flowrate.
Flow Meter
CAUTION
:
DO NOT OVERTIGHTEN THE METERING
VALVES or you will damage them. They
are not ON/OFF VALVES!
3-way Selector Valve
This valve selects what gas flows past the sensor. You can rotate this valve clockwise or counter-
clockwise. In the SAMPLE position, sample gas will flow past the sensor. In the SPAN position, span
gas from the connected cylinder will enter through the SPAN GAS INLET PORT and flow past the
sensor (note: this port is provided for periodic calibrations). In the OFF position, both SAMPLE GAS
INLET PORT and SPAN GAS INLET PORT are blocked, which prevents any gas flow.
STEPS
Flow Meter
The flow meter indicates the flow rate of either the sample or span gas through the Analyzer.
2.
Rotate the 3-WAY SELECTOR VALVE to the SAMPLE position. Then, slowly adjust the
METERING VALVE until the FLOW METER reads ~ 1.0 SCFH.
3.
Allow the sample gas to purge the tubing and Analyzer.
END OF INSTALLATION
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