Manual english
EE371 / EE372
page 21
2.3 Autocalibration
Dew point temperatures in the range -60 to -20°C
(-76...-4°F)
at room temperatures correspond to relative humidities of 0.08 to 5.37% RH.
To guarantee the accuracy at the lowest humidity, even the smallest drift effects in the humidity sensing element have to be
compensated.
A special autocalibration method is used to compensate for the usual drift effects in the EE371/372 series, resulting in high-precision
measurements even at the lowest dew point temperatures.
Autocalibration is carried out every 30 minutes and takes approx. 3 minutes. During the autocalibration, the analogue outputs are frozen
at the last measuring value.
3. INSTALLATION
3.1 Installation location
Select a location that is as clean as possible and offers optimum measuring conditions. Air must be able to circulate freely around the
sensing element.
Temperature differences between the process and the location of installation do not affect the dew point measurement. However
attention should be paid to that changes in the pressure of a gas also changes the dew point. If there is a difference in pressure between
the location of installation and the process, the dew point measurement can be tens of degrees off.
The exact effects of a change in pressure on the dew point can be simulated using the E+E humidity calculator.
For details, please go to our website at www.epluse.com.
Leaks should be avoided, because penetration of humidity from the environment will affect the measurement.
Summary of Contents for EE371
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