Voltage Only Connections; Connections - Single Channel Voltage; Figure - Keithley 2182 User Manual

2-14 Voltage and Temperature Measurements
To make these customized connections, you can modify the supplied input cable, or you can
use the LEMO connector that is included with the optional Model 2182-KIT.
CAUTION

Voltage only connections

Single Channel Measurement Connections —
measure a DUT using a single channel. When using Channel 2, its inputs must be referenced to
Channel 1 LO as shown in

Figure 2-4

Connections - single channel voltage

HI
CH 1
LO
HI
CH 2
LO
2182
A. Channel 1 Measurements
Dual Channel Measurement Connections — The dual channel feature of the Model 2182
allows you to make comparison measurements within a test circuit.
connections to make comparison measurements of two devices in a test circuit. For this
measurement configuration, there is no voltage differential between the two measurement
channels. Channel 2 HI is connected directly to Channel 1 LO.
Figure
channels. The differential is the 2V drop across R. Channel 1 measures voltage across DUT #1
and Channel 2 measures voltage across DUT #2. Internally, the A/D converter references
Channel 2 measurements to Channel 1 LO. For example, if 1V is being input to Channel 2 and
there is a 2V differential between the two channels, 3V will be applied to the A/D converter.
Therefore, if Channel 2 is on the 1V range, the 3V applied to the A/D converter will cause it to
overflow. The 1V measurement on Channel 2 can only be performed on the 10V range.
Silver solder has a high temperature melting point. Take care not to damage
the LEMO connector by applying excessive heat.
FFigure
Cable-to-copper
2107
wire connection
Input Cable
(one of two)
red
DCV1 DUT
black
green
R
LEAD
white
Test Circuit
2-5B shows a measurement configuration that has a voltage differential between two
Figure 2-4
2-4B.
2107
Input Cable
red
HI
CH 1
black
LO
HI
green
CH 2
DCV2
LO
white
2182
B. Channel 2 Measurements
shows typical connections to
Cable-to-copper
wire connection
(one of three)
R
LEAD
DUT
Test Circuit
Figure 2-5A shows typical