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RTD / Resistance measurement
PCE-MCA 50 is capable of RTD/Resistance measurement.
The
following picture displays the connection for RTD and Resistance
measurement.
➢
2-Wire RTD Measurement
Two leftmost terminals are used in 2-wire systems. PCE-MCA
50 displays the selected wiring system in run page. PCE-MCA
50 sources current through the resistor and measure the
voltage drop across same terminals. The result is acceptable, if
the resistance of the connection wires is significantly smaller
than actual measured resistance.
➢
3-Wire RTD Measurement
PCE-MCA 50 sources current through the resistor and measure
the voltage drop across the entire current loop and across the
upper side connection wire as shown in figure. If both left side
connection wires are identical, PCE-MCA 50 can compensate
for the resistance of the connection wires.
➢
4-Wire RTD Measurement
PCE-MCA 50 sources current through the resistor from two left
side terminals and measure the voltage drop across the resistor
from the two right side terminals. The 4-wire method gives the
