5.3 Related Information
Most of the measurements, generations and simulations presented in this
manual are straight forward: Just make the required window settings and
connect the instrument under test to the active terminals and that’s it!
Some cases require additional settings and things to check before you
can be certain that the measurement, generation or simulation works as
expected. A typical example of this is temperature measurement using a
thermocouple. It is not enough to select the correct function in PCE-MCA
50. The Sensor type and the Reference Junction Mode have to be set
accordingly, too. Wrong settings give erroneous results.
Whenever this additional information may be of use in a measurement,
generation or simulation, text describing the function refers to one of the
following chapters. An experienced may skip this supplemental text, but
for a beginner we highly recommend it.
The subjects described here are:
•
Thermocouple Measurement/Simulation, Connections and
troubleshooting
on page no 86.
•
Parallel Functions
in PCE-MCA 50 on page no 89.
5.3.1 Thermocouple Measurement/Simulation, Connections and
troubleshooting.
To accurately measure the thermo-voltage caused by the temperature
to be measured, the second thermo-voltage caused by the Reference
Junction needs to be compensated. This is done using one of the
Reference Junction compensation methods described in the
subsequent chapters.
The Reference Junction compensation method has to be chosen both
when measuring and simulating thermocouples.
➢
Internal Reference Junction
PCE-MCA 50
’s Internal Reference Junction makes
thermocouple measurement / simulation easy. No external
connections are required, just connect the thermocouple or a
thermo-voltage receiver directly to PCE-MCA 50
’s “T/C”
terminals. To select this compensation method, set the SCR1
field “T/C Sensor Measurement” or “T/C Sensor Simulation”,
make sure the Unit is a temperature unit and set the CJC Mode
to “Auto”.
