Voltage And Temperature Connections; Connections - Temperature (Simulated Reference); Figure; Connections - Voltage And Temperature (Internal Reference) - Keithley 2182 User Manual

2-16 Voltage and Temperature Measurements

Figure 2-7

junction. Note that the connection points for the input cable and the thermocouple wires are
immersed in the ice bath.
Figure 2-7

Connections - temperature (simulated reference)

HI
CH 1
LO
HI
CH 2
LO
2182

Voltage and temperature connections

Channel 1 should be used for voltage measurements since it supports a wider range of
measurements, leaving Channel 2 to measure temperature.
A connection example using the internal reference junction for temperature measurements is
shown in
Channel 2 measures the temperature of the DUT. Notice the jumper wire from the thermocouple
to test circuit low. If the case of the DUT is metal and already connected to test circuit low, the
jumper would not be needed. Also, if there is enough thermal bonding between the DUT and test
circuit low, the thermocouple can be connected directly to low.
Figure 2-8

Connections - voltage and temperature (internal reference)

HI
CH 1
LO
HI
CH 2
LO
2182
shows temperature only connections using an ice bath as a simulated reference
Thermocouple
2107
Input Cable
red
TEMP1
black
green
white
Cable-to-thermocouple
wire connection (one
of two)
Figure 2-8. In this example, Channel 1 measures the voltage drop across the DUT and
Copper wire soldered directly
to LEMO connector (one of
two)
Thermocouple
DCV1
TEMP2
Thermocouple wire soldered directly
to LEMO connector (one of two)
DUT
Test Circuit
Ice Bath
Cable-to-copper
wire connection
(one of two)
DUT
Test Circuit