© Isothermal Technology
Page 54 of 102
923 milliK manual - issue: 1.10
4
5
6
1
2
I-
I+
V+
V-
3
+tc
PRT/SPRT
NC
NC
If the PRT is supplied with only a 2-wire connection, convert from 4-wire to 2-wire
connection as close to the PRT as possible:
4
5
6
1
2
I-
I+
V+
V-
3
+tc
PRT/SPRT
NC
NC
If the PRT is supplied with a 3-wire connection, the current and common wires should be of
the same resistance (of same length and gauge) and connected directly to I+ and I- (pins 2
and 3) and a link that carries no current should be made from pin 1 to pin 2 (see section
3.1.3):
4
5
6
1
2
I-
I+
V+
V-
3
+tc
PRT/SPRT
NC
NC
4.2 Connecting Thermistors to milliK
High accuracy thermistor based thermometers are typically supplied with screened 4-wire
cables. The relatively high resistance of thermistors makes them more susceptible to external
noise, so it is important to connect the cable screen (if provided) to the body of the Lemo
connector.
