8-3
2. Measuring
(1) Check the output concentration at “0” position, 0.4, 1, 2, 3, 5, and MAX in ascending
order.
(2) Correct measured values, according to the carrier gas..
Air check: no correction.
O
2
check: reduce the measured values as follows:
Measured value vol% Correction
<1%
1.0-2.0
2.0-4.0
5.0-8.0
-0.05
-0.10
-0.20
-0.30
If the data displayed is in % partial pressure, no correction is made. If it is in vol.%, it needs to be
converted to partial pressure. The formula is:
Concentration (% partial pressure) =
Measured value (vol.%) x atmospheric pressure (kPa)
101.3 kPa
3. Determine the accuracy range.
Range of concentration accuracy (maximum value always applies)
Operating environment
15 to 35℃ or 0.2 to 10 L/min 10 to 15℃ or 35 to 40℃ or 10 to
15 L/min
Set concentration ≤6% ±0.20 vol.% or ±20% rel.,
whichever is greater
+0.30/-0.20 vol.% or +25/-20%
rel., whichever is greater
Set concentration > 6% ±0.25 vol.% or ±20% rel.,
whichever is greater
+0.35/-0.25 vol.% or +30/-20%
rel., whichever is greater
4. Test result
If the corrected measured value is within the permissible range of output concentration, the
vaporizer can be put into operation.
CAUTION
z If the corrected measured value is not within the permissible range of output
concentration, do not use the vaporizer. Have the vaporizer checked by trained service
personnel.
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