BEAMEX FB150 - Figure 7 -R Option Panel; R Option Panel (-R Models Only)

FBXXX Field Temperature Block
Parts and Controls
20
3.2.4 -R Option Panel (-R models only)
The -R (reference sensor) panel is the readout portion of the instrument and is only
available with -R models.
Figure 7 -R option panel
Reference Thermometer Connection (1)
The 6-pin Lemo smart connector on the front panel allows a reference probe to be at-
tached to the instrument for use with the reference thermometer function of the instru-
ment. The smart connector stores probe calibration coefcients. Using an adapter, the
6-pin Lemo will accept 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 us-
ing 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 Lemo connector. Figure 8 shows how a four-wire probe is wired to the 6-pin
Lemo 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.