Izs Desiccant Option; Performing Leak Checks; Vacuum Leak Check And Pump Check - Teledyne T400 User Manual

5.6.4 IZS D
ESICCANT
The analyzer can be fitted with a desiccant dryer to provide a dry air source to the IZS
sub-system. This option consists of a rear panel mounted scrubber cartridge filled with
anhydrous calcium sulfate (CaSO
The desiccant material is expendable and must be replaced at regular intervals per the
Maintenance Schedule. Replacement guidelines are as follows:
• Initially the desiccant should be monitored frequently until a standard replacement interval
can be established.
• Replace when the material exhibits a color change from blue to pink where it has been
saturated with water vapor.
• Refill the scrubber cartridge before the entire scrubber turns pink.
Replacement interval will depend on how often the IZS is used, as well as ambient levels
•
of humidity in your application.
5.6.5 P
ERFORMING
Leaks are the most common cause of analyzer malfunction; Section 5.6.5.1 presents a
simple leak check procedure. Section 5.6.5.2 details a more thorough procedure.
5.6.5.1

VACUUM LEAK CHECK AND PUMP CHECK

This method is easy and fast. It detects, but does not locate most leaks. It also verifies
that the sample pump is in good condition.
1. Turn the analyzer ON, and allow enough time for flows to stabilize.
2. Cap the sample inlet port.
3. After a few minutes, when the pressure has stabilized, note the SAMPLE
4. Check the sample gas flow.
083730400A DCN8130
O
PTION
) desiccant.
4
L C
EAK HECKS
PRESSURE reading in the Dashboard.
If the reading is < 10 in-Hg, the pump is in good condition and there are no large
•
leaks.
If the flow is <10 cm /min and stable, there are no large leaks in the instrument's
• 3
pneumatics.
Teledyne API – Model T400 O Analyzer
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