Table of Contents
Advertisement
D e t e c t i o n
D e t e c t i o n
5.3
MEASURING ON COMPRESSORS
•
Switch on the compressor
•
Wait until 200 or 300 bar is reached
•
Switch off the compressor
•
Slowly open valve on the compressor
•
Perform the test as described in 5.2
The water content that is measured in air from a compressor only corresponds to the water content of compressor gas
cylinders simultaneously charged, or cylinders charged immediately after measuring, if a pressure retaining valve is built
into the compressor at the exit side of the drying cartridges. A prerequisite, however, is that the cylinders to be charged are
dry.
The pressure retaining valve assures that the pressure inside the compressor drops only insignificantly from the maximum
pressure of 300 or 200 bar, when cylinders are being charged. With a compressor that has no pressure retaining valve be-
hind the filters, water from the drying cartridge can be released to the sudden decompression when the charging connec-
tion is opened. The air has then higher water content as was measured on the compressor charging panel.
To dismantle the BAT, turn off the compressor until the point that there is no pressure on the BAT anymore, and unscrew
the regulator of the adapter, whereafter you can unscrew the adapter of the compressor. Place the BAT inside the suitcase.
6.
Interpreting Tube Readings
A
When the end of the colour change layer is flat, Read the value at the end of the layer. In this example, the reading
should be 5%.
B
When the end of the colour change layer is slanted. Read the value in the middle of the slant. In this exaggerated
example, the reading should be 5%.
C
When the demarcation of the colour change layer is pale. Read the value in the middle between the dark layer
end and the pale layer end. In this exaggerated example, the reading should be 5%.
WatchGas BAT-1, 2, 3 Breathing Air Quality Test Kit
Full Compliance with BS EN12021
12
User Manual
Advertisement
Table of Contents
