Fluke 1522 - Manual (Page 31)

C1 and P1 terminals and the other single wire to the C2 and P2 terminals
(which are shorted together).
1522 Handheld Thermometer Readout
User’s Guide
30
GND
P1
C2
P2
C1
J1 J2
Hart Scientific
Four-wire Connection
GND
P1
C2
P2
C1
J1 J2
Hart Scientific
Three-wire Connection
GND
P1
C2
P2
C1
J1 J2
Hart Scientific
Two-wire Connection
Short
Short
Figure 7 Probe Wiring Diagrams