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

914X Field Metrology Wells
Parts and Controls
22
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.
Figure 7
REF PRT
TC
COM
mA LOOP
MEASURE
30 V, 24 mA MAX ALL TERMINALS
50 mA F
250 V
F
U
S
E
F
U
S
E
1
2
3
4
5
-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 coefcients. The 6-pin DIN accepts traditional connectors and
the probe coefcients 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.