Keithley 2182, Руководство пользователя, Страница: 57 / 339

Voltage and Temperature Measurements 2-17
Figure 2-9 shows the same test except that a simulated reference junction (ice bath) is used.
Figure 2-9
Connections - voltage and temperature (simulated reference)
Cleaning test circuit connectors
Wherever possible, copper-to-copper connections should be used throughout your test
circuit(s) to minimize thermal EMFs. However, exposed copper is susceptible to oxidation
which could corrupt the measurement. Make sure that the copper contact surfaces are free of
oxidation before making the connection. DeoxIT can be used to clean copper connectors. A
small bottle of DeoxIT is supplied with the Model 2182.
The Model 2107 Input Cable is terminated with copper lugs, and the connection terminals of
a LEMO connector are copper. Perform the following steps to clean the copper connectors used
in your test circuit.
1. Using a lint-free foam swab (or other applicator), soak up a small amount of DeoxIT.
2. Apply the DeoxIT sparingly to connector/contact. Only a thin coating is required.
NOTE After cleaning, make your test circuit connections in a timely manner to prevent
oxidation from forming on exposed connector surfaces.
Test Circuit
DUT
HI
HI
LO
LO
black
red
DCV1 CH 1
CH 2
2182
2107
Input Cable
Thermocouple
Ice Bath
Cable-to-thermocouple
wire connection (one
of two)
white
green
TEMP2
Cable-to-copper
wire connection
(one of two)