Oxygen Concentration; Humidity; Mixing Ratio; Relative Humidity - YOKOGAWA ZR402G User Manual

A32 Min. oxygen concentration
A33 Occurrence of minimum oxygen
concentration
A34 Average oxygen concentration
A35 Maximum humidity
A36 Occurrence of maximum humidity
A37 Minimum humidity
A38 Occurrence of minimum humidity
A39 Average humidity
A40 Maximum humidity
A41 Occurrence of maximum humidity
A42 Minimum humidity
A43 Occurrence of minimum humidity
A44 Average humidity
10.1.1

Oxygen Concentration

The oxygen concentration in the process gas is displayed (consult Section 9.1.1, earlier in this
manual).
10.1.2

Humidity

The moisture content contained in air is displayed where the process gas contains water vapors
and air (refer to Section 9.1.1, earlier in this manual).
10.1.3

Mixing Ratio

Where the process gas contains water vapors and air, their mixing ratio is displayed (refer to
Section 9.1.1, earlier in this manual).
10.1.4

Relative Humidity

The relative humidity "U" may be obtained using the following theoretical equation (JIS Z 8806).
U = e/e
Since the gas-pressure ratio is equal to the volume ratio, the above equation may be expressed
mathematically by:
U = P x H/ e
The saturated water vapor pressure es is determined by a gas temperature, so the relative
humidity can be obtained by entering the parameters. Use parameter F13 for temperature entry.
Use parameter F14 for pressure entry.
10.1.5

Dew Point

The dew point is the temperature at which a water vapor pressure in the moist air is equal to the
saturated water vapor pressure.
x100
s
where, e = Water vapor pressure of moist air
e = Saturated water vapor
s
x100
s
where, P = Gas pressure
H = Humidity (volume ratio)
<10. Other Functions>
% O A77 Calibration history 7
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% O A79 Calibration history 9
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%H O A80 Time
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%H O
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%H O
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kg/kg
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kg/kg
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kg/kg
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HH.MM
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IM 11M12A01-04E 11th Edition : Jul. 19, 2017-00
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