Teledyne 100AH instruction manual Leak Check Procedure

Teledyne API Model 100AH SO2 Analyzer Instruction Manual, 02417, Rev. D

9.7 Leak Check Procedure

There are two methods of leak checking. The vacuum method is the simplest but it does not show the location of a leak. This vacuum method described below is the general method when a Leak Checker is not readily available. The other method is the pressure method. This can be used to find the exact location of a leak by using bubble solution.

NOTE

Do not use a bubble solution during vacuum method as the

solution may enter and contaminate the cell.

Vacuum method (general check):

1.Cap the sample inlet port.

2.Set the TEST function to VACUUM pressure. Wait for stable reading and record the reading.

3.Unplug the power cord of the pump.

4.Observe the VACUUM pressure reading for about 30 seconds. It should be close (±0.2 in- Hg) to the previous reading in step 2 if the pneumatic system including the pump is leak free.

The above method is a general method to check the pneumatic system when a leak checker is not available. The above test checks the sensor pneumatic leak including the pump and therefore the pump must be in good condition to hold the vacuum pressure. Perform the above test only when a leak checker is not available.

If a Leak Checker is readily available, then use it in place of the pump to pull the vacuum. After step 1 of above, pull the vacuum for about 20 in-Hg and close the shut off valve of the leak checker and turn off the pump. If the pressure changes more than 1 in-Hg within 5 minutes, there is a leak. It is not possible by the vacuum method to tell where the leak is located. See the pressure method below to locate the leak.

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