Product Description; General; Dimensions In Mm (Inch); Autocalibration - E+E Elektronik EE375 series Bedienungsanleitung

2.

PRODUCT DESCRIPTION

2.1

General

Dew point temperature transmitters of the EE375 series are based on a compact
construction in a robust aluminium housing.
The core of the EE375 series is the monolithic measurement cell type HMC01,
manufactured in thin-film technology by E+E Elektronik.
An autocalibration procedure, integrated in the device, allows for an accuracy of
<2°C Td (±3.6°F Td).
The transmitter has one freely selectable and scaleable output for dew point, frost point
or ppm volume concentration.
The optional configuration software allows flexible and easy adjustment of the analogue
output to the respective requirements. The adjustment / calibration of the
transmitters can easily be performed.
2.2

Dimensions in mm (inch)

100
(4")
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
EE375 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 output is 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.
28
(1.1")
32
(1.3")
11
spanner
width:
pressure tight
27 or 24
feedthrough