Detailed Pressure Leak Check; Performing A Sample Flow Check - Teledyne 100E Instruction Manual

Model 100E Instruction Manual

11.5.1. Detailed Pressure Leak Check

Obtain a leak checker similar to T-API part number 01960, which contains a small pump,
shut-off valve, and pressure gauge to create both over-pressure and vacuum.
Alternatively, a tank of pressurized gas, with the two stage regulator adjusted to ≤ 15
psi, a shutoff valve and pressure gauge may be used.
Once tube fittings have been wetted with soap solution under a pressurized
system, do not apply or re-apply vacuum as this will cause soap solution to be
sucked into the instrument, contaminating inside surfaces.
Do not exceed 15 psi when pressurizing the system.
• Turn OFF power to the instrument and remove the instrument cover.
• Install a leak checker or a tank of gas (compressed, oil-free air or nitrogen) as
described above on the sample inlet at the rear panel.
• Pressurize the instrument with the leak checker or tank gas, allowing enough time
to fully pressurize the instrument through the critical flow orifice. Check each tube
connection (fittings, hose clamps) with soap bubble solution, looking for fine
bubbles. Once the fittings have been wetted with soap solution, do not re-apply
vacuum as it will draw soap solution into the instrument and contaminate it. Do
not exceed 15 psi pressure.
• If the instrument has the zero and span valve option, the normally closed ports on
each valve should also be separately checked. Connect the leak checker to the
normally closed ports and check with soap bubble solution.
• If the analyzer is equipped with an IZS Option Connect the leak checker to the Dry
Air inlet and check with soap bubble solution.
• Once the leak has been located and repaired, the leak-down rate of the indicated
pressure should be less than 1 in-Hg-A (0.4 psi) in 5 minutes after the pressure is
turned off.
• Clean soap solution from all surfaces, re-connect the sample and exhaust lines and
replace the instrument cover. Restart the analyzer.

11.5.2. Performing a Sample Flow Check

Use a separate, calibrated flow meter capable of measuring flows between 0
and 1000 cm³/min to measure the gas flow rate though the analyzer. Do not
use the built in flow measurement viewable from the front panel of the
045150102 Rev XB1
CAUTION
CAUTION
instrument.
TROUBLESHOOTING & REPAIR
209