JUMO Wtrans E01, Operating Manual

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1 Introduction
8
1.2 Brief description
The Wtrans E01 measuring probe is used in combination with a Wtrans receiver for recording measured
values using digital sensors for humidity, temperature, and CO
2
. The measuring probe has two inputs
with plug connectors M12 × 1 to which the sensors can be connected and where the sensors are detect-
ed in any combination (plug and play).
Other measurands can be derived from the measured values determined. Up to four measured values
are recorded. They are transmitted to the receiver of the Wtrans measuring system at a radio frequency
of 868.4 MHz and displayed there. They are available as digital or analog output variables. The voltage
is supplied externally (DC 18 to 30 V) or internally by means of four lithium batteries (size AA). The bat-
tery operating life with the recommended type of battery is one year (with default settings and one sen-
sor).
The electronics of the measuring probe with backlit LCD display and operating keys are encased in a
wall-mounted case (protection type IP65). The ambient temperature range of the measuring probe is
-30 to +80 °C, but the differing ambient temperatures of the sensors and lithium batteries must also be
considered. The measuring probe can be configured using the USB interface or the operating keys.
1.3 Block diagram
Wtrans E01
Voltage supply
Battery 4× 1.5 V
or
external voltage supply
DC 18 to 30 V
Transmission unit
Radio frequency
868.4 MHz
Input
2 connections for
humidity and temperature,
CO or Pt1000 RTD
temperature probe, class A
in 4-wire circuit
2
Keypad
4 keys
for operation
and configuration
Display
LCD display
for measured value display
and configuration
USB interface
Setup