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Teledyne API Model 100AH SO
2
Analyzer Instruction Manual, 02417, Rev. D
10.5 Pneumatic System Troubleshooting
The pneumatic system is diagrammed in Figure 9-3 depending on which options the instrument
was ordered with.
10.5.1 Leak Check
CAUTION
When doing a leak check do not pressurize the M100AH to
greater than 15 psig. Damage to internal components will
occur at higher pressures.
Many performance problems are caused by leaks. Refer to Section 9.7 for the leak check
procedure.
10.5.2 Pump
The external vacuum pump is capable of 14"Hg Absolute pressure at 1 SLPM or better to
maintain critical flow. If the vacuum pressure reading noted is higher than 10”HG, the pump
may need servicing. A pneumatic leak also can cause higher pressure reading.
10.5.3 Z/S Valves
The Z/S Valves is an option in the instrument. Before troubleshooting this sub-assembly, check
that the options were ordered, and that they are enabled in the software (if not call factory).
Check for the Z/S valves:
1. Check for the physical presence of the valves. See Figure 2-5 for Z/S Valve location.
2. Check front panel for option presence. The front panel display when the instrument is in
SAMPLE more should display CALS and CALZ buttons on the second line of the display.
The presence of the buttons indicates that the option has been enabled in software.
Troubleshooting the Z/S valves:
1. It is possible to manually toggle each of the valves in the DIAGNOSTIC mode. Refer to
Section 10.1.3 for information on using the DIAG mode. Also refer to Figure 9-3 for a
pneumatic diagram of the system.
2. Plug the corresponding inlet port on the rear panel with your finger and feel the weak
vacuum produced. If not, check LED on the power supply module (refer to Table 10-8) for
valve switching.
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