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EE33 Humidity / Temperature Sensor for High Humidity and Chemical Applications
Switching parameters:
EE33 Type T5/8/10/17 EE33 Type T7
freely selectable between
RH Relative humidity
T Temperature
Td Dew point temperature
Tf Frost point temperature
Tw Wet bulb temperature
e Water vapour partial pressure
r Mixture ratio
dv Absolute humidity
h Specific enthalpy
Tab. 1 Option AM2 selectable switching parameters
8.3 Integrated Power Supply (Option AM3)
AC power supply with 100 - 240 V is possible with this option.
Please refer to chapter 6.4 for electrical connection details.
9 Humidity / TemperatureCalibration
The EE33 sensor can be calibrated in two ways:
1-pointhumidity/temperaturecalibration: quick and simple calibration on a defined humidity/
temperature point (working point).
2-pointhumidity/temperaturecalibration: calibration for accurate measuring results over the entire
humidity/temperature working range.
To reach a temperature balance it is recommended to keep the transmitter and the reference
chamber (e.g. HUMOR 20,...) for minimum 4 hours in the same room.
During stabilisation period and calibration procedure it is important to keep the temperature constant
in the reference climate chamber.
For calibration the humidity sensor probe must be stabilised at least 20 minutes into the reference
chamber.
Replace a used dirty filter cap before calibration!
Calibration may be performed
With the help of the EE-PCS. The EE-PCS leads the user through the procedure step by step.
Using the pushbuttons directly on the circuit board. The according procedures are explained below.
9.1 2-point Humidity Calibration
For accurate adjustment over the entire humidity working range a 2-point calibration is recommended.
Start calibration at the low humidity calibration point!
The humidity difference between the two points should be > 30 %RH
Low humidity point < high humidity point
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