Cleaning Input Connectors - Keithley 2182 User Manual

Cleaning input connectors

The two-channel LEMO connector on the front panel is used to connect the Model 2182 to
external test circuits. This connector mates to the LEMO connector on the Model 2107 input
cable or to the LEMO connector that is included with the Model 2182-KIT.
The contacts of the LEMO connectors are made of copper. These copper-to-copper
connections minimize thermal EMFs. However, exposed copper is susceptible to oxidation,
which could cause measurement errors. A small bottle of DeoxIT is supplied with the Model
2182. This fluid is used to remove oxidation from copper.
Before connecting a LEMO connector to the LEMO input connector on the instrument, clean
the copper contacts of the connectors as follows:
1.
2.
3.
4.
5.
NOTE
Turn off the Model 2182 and, at the rear panel, disconnect the line cord and any other
cables or wires connected to the instrument.
Stand the Model 2182 on end such that the front panel is facing up.
Apply one drop of DeoxIT to each of the four contacts of the LEMO input connector on
the Model 2182. You can use a clean wire (such as a resistor lead) to carry a drop of the
solution from the bottle of DeoxIT to the connector.
Wipe off any excess DeoxIT using a clean cloth.
To clean the contacts of the mating LEMO connector, connect and disconnect it to the
Model 2182 several times to spread the DeoxIT around.
To minimize the accumulation of oxides on LEMO contacts, always keep the LEMO
input connectors mated whenever possible. However, cleaning should still be
performed after an extended period of time.
Getting Started 1-13