Teledyne T200 User Manual page 144

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2. Check pressures.
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3. If none of these suggestions help, carry out a detailed leak check of the analyzer
as described in Section 5.6.11.2.
142 Teledyne API T200 NO/NO
Ensure that the unit is in basic SAMPLE mode.
Place a finger over the inlet and feel for suction by the vacuum or, more
properly, use a flow meter to measure the actual flow.
If there is proper flow of around 450-550 cc/min, contact Technical Support.
If there is no flow or low flow, continue with the next step.
Check that the sample pressure is at or around 28 in-Hg-A at sea level (adjust
as necessary when in elevated location, the pressure should be about 1"
below ambient atmospheric pressure) and that the Rx Cell pressure is below
10 in-Hg-A.
The analyzer will calculate a sample flow up to about 14 in-Hg-A RCEL
pressure but a good pump should always provide less than 10 in-Hg-A.
If both pressures are the same and around atmospheric pressure, the pump
does not operate properly or is not connected properly. The instrument does
not get any vacuum.
If both pressures are about the same and low (probably under 10 in-Hg-A, or
~20" on sample and 15" on vacuum), there is a cross-leak between sample
flow path and vacuum, most likely through the dryer flow paths. Check for
leaks (Section 5.6.11).
If the sample and vacuum pressures are around their nominal values (28 and
<10 in-Hg-A, respectively) and the flow still displays no numerical value, carry
out a leak check as described in Section 5.6.11.
If gas flows through the instrument during the above tests but goes to zero or
is low when it is connected to zero air or span gas, the flow problem is not
internal to the analyzer but likely caused by the gas source such as
calibrators/generators, empty gas tanks, clogged valves, regulators and gas
lines.
If an IZS or Zero/Span valve option is installed in the instrument, press Start
in the Calibration>Zero and Span menus. If the sample flow increases,
suspect a bad Sample/Cal valve.
/NO Analyzer with NumaView™ Software
2 x
083730200A DCN7962