NOTE: The counter will not increase if the handle mark is at
▲
50 (50ml)
The counter ring cannot be rotated while the handle is pulled out. Do not try to force it to rotate
because you may break the counter.
Do not grasp the counter when sampling. Otherwise, the counter will not operate properly resulting
in a malfunction.
How To Take Readings and Calculate The Results
Follow the procedures below on how to read the scale, correct for external factors and record the
results. For correction factors, firstly correct the temperature or humidity against the reading, then
correct for the number of samplings (refer to the manual of each detector tube), and correct for the
ambient pressure.
Also check for any interference gases present in the measuring environment. If there are any external
influences such as gas that may affect the detector tube.
How To Read The Scale
After completing sampling, immediately read the scale at the end of the colour change layer.
Marking the end of the colour change with a pen may be useful for easy reading and later
confirmation.
Hints for detector tube reading
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
When the end of the colour change is slanted
Read the value in the middle of the slanted portion of the slant. In this exaggerated example, the
reading should be 5, which is in the middle of 4 and 6.
