P Option Panel (-P Models Only); Figure 7 -P Option Panel - Fluke 9142 User Manual

914X Field Metrology Wells
Parts and Controls
3.2.4

-P Option Panel (-P models only)

The –P (process version) panel is the readout portion of the instrument and is only available
with –P models.
mA LOOP
REF PRT
1
30 V, 24 mA MAX ALL TERMINALS
Figure 7
-P option panel
Reference Thermometer Connection (1)
The 6-pin DIN smart connector on the front panel allows a reference probe to be attached to the
instrument for use with the reference thermometer function of the instrument. The smart con-
nector stores probe calibration coefficients. The 6-pin DIN accepts traditional connectors and
the probe coefficients can be entered into the readout or an appropriate characterization curve
can be selected through the user interface (see Section 1.5.2, Immunity Testing, on page 8 for
information on using clamp-on ferrites).
A PRT is the only type of probe that is supported by the reference thermometer input. The PRT
(RTD or SPRT) probe connects to the reference thermometer input using a 6-pin DIN connec-
tor. Figure 8 shows how a four-wire probe is wired to the 6-pin DIN connector. One pair of
wires attaches to pins 1 and 2 and the other pair attaches to pins 4 and 5 (pins 1 and 5 source
current and pins 2 and 4 sense the potential). If a shield wire is present, it should be connected
to pin 3, which is also used for the memory circuit. Pin 6 is only used for the memory circuit.
22
MEASURE
2
COM
TC
4
3
5
50 mA F
250 V