FLUKE 9142-A-156 User Manual for the Fluke 9142-A-156 Low Temp Field Metrology Well

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914X Field Metrology Wells

Parts and Controls

-P Option Panel (-P models only)3.2.4

The –P (process version) panel is the readout portion of the instrument and is only available

with –P models.

REF PRT

COM

mA LOOP

MEASURE

30 V, 24 mA MAX ALL TERMINALS

50 mA F

250 V

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 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.

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FLUKE 9142-A-156 Low Temp Field Metrology Well