Peakanalyzer Installation Manual Version 2.6
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2.3.10 Connection of PT100 resistor sensors to terminals of type EL3202-0010
Picture 9: Connection of PT100 sensors
The analog input terminal of the type EL3202-0010 provides two input channels for the
connection of two PT100 resistor sensors for temperature measurement. The Peakanalyzer
drives these channels with PT100 sensors in a 4-wire connection mode. This connection mode
provides the maximal accuracy. The current input and the high-resistance voltage
measurements of the PT100 sensors is done by separate wire pairs. Thus the cable cannot
distort the measurement by its internal resistance. The current drive is done via the wire pairs
that are connected to the clamps labeled with +R1 and -R1 as well as +R2 and -R2. The high-
resistance voltage measurement is done via the wire pairs that are connected to the clamps
labeled with +L1 and -L1 as well as +L2 and -L2. Failure of a sensor or a broken wire are
signalized by a red LED. The input channels itself are labeled in the range of 11 to 49. The
connection of four PT100 resistor sensors is shown in Picture 9.
2.3.11 Connection of resistance measuring bridges to terminals of type EL3356-0010
The analog input terminal EL3356-0010 allows the direct connection of a resistance measuring
bridge for example a strain gauge. This terminal is typically used in the Peakanalyzer variation
Baseanalyzer. Left of the terminal for the resistance measuring bridge has to be a power supply
terminal of the type EL9505 with the label X9. This terminal supplies the following measuring
bridge terminals with 5 V
DC
supply voltage at the power clamps. This voltage is provided via
the clamps labeled with +U
V
and -U
V
for the strain gauges. In order that the wires with its
internal resistance do not distort the voltage measurement, an additional high-resistance