Performing A Sample Flow Check; Maintaining The Photometer Absorption Tube - Teledyne T400 User Manual

5.6.6 P
ERFORMING A
1. Power off the analyzer.
2. Attach the flow meter to the sample inlet port on the rear panel. Ensure that the inlet
3. Sample flow should be 800 cm
4. Once an accurate measurement has been recorded by the method described
5.6.7 M
AINTAINING THE
NOTE
1. Power off the unit.
2. Remove the cover from analyzer.
3. Locate the optical bench (see Error! Reference source not found.).
4. Remove the top cover of the optical bench.
5. Unclip the sample thermistor from the tube.
6. Loosen the two screws on the round tube retainers at either end of the tube.
7. Using both hands, carefully rotate the tube to free it.
8. Slide the tube towards the lamp housing.
• Slide the front of the tube past the detector block and out of the instrument.
9. Clean the tube only with de-ionized water.
083730400A DCN8130
S F
AMPLE LOW
Always use a separate calibrated flow meter capable of measuring
flows in the 0 – 1000 cc/min range to measure the gas flow rate
though the analyzer.
DO NOT use the built in flow measurement viewable from the Front
Panel of the instrument. This measurement is only for detecting
major flow interruptions such as clogged or plugged gas lines.
See rear panelfor SAMPLE port location.
to the flow meter is at atmospheric pressure.
Low flows indicate blockage somewhere in the pneumatic pathway, typically a
•
plugged sintered filter or critical flow orifice in one of the analyzer's flow control
assemblies.
High flows indicate leaks downstream of the Flow Control Assembly.
•
above, adjust the analyzer's internal flow sensors (See Section 4.5.2).
P
HOTOMETER
This procedure should never be needed as long as the
photometer is supplied with clean, dry, particulate-free
zero air only. However, this procedure is included for the
rare event that cleaning or replacing the absorption tube is
required.
CAUTION – General Safety Hazard
Do not cause the tube to bind against the metal housings: the tube
may break and cause serious injury.
Teledyne API – Model T400 O
C
HECK
CAUTION
/min ± 10%.
3
A T
BSORPTION UBE
Analyzer
3
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