Operation theatres measuring
temperature by 0.2 C accuracy
Trelleborgs Hospital has recently installed temperature sensors for
precision measurement. The sensors are equipped with measuring units
The installation has been done with a 4-wire circuit which is converted
via a measurement transducer to 0-10V.
Technical data for the measurement transducer:
The 4-wire connection is used where the wire
resistance causes measurement errors, and where higher standards of
accuracy is required.
In a 4-wire connection one wire pair used for power supply of the sensor
and the other wire pair is used for voltage measurement.
The measuring bridge is högohmig and thus no current flows in the
measurement wires and hence no voltage drop due to wire resistance.