Calibration Considerations; Calibration Code - Keithley 2701 Service Manual

Model 2701 Ethernet-Based DMM / Data Acquisition System Service Manual

Calibration considerations

When performing the calibration procedures:
•
Make sure that the equipment is properly warmed up and connected to the appropriate input
jacks. Also make sure that the correct front or rear terminals are selected with the INPUTS
switch.
•
Make sure the calibrator is in OPERATE before you complete each calibration step.
•
Always let the source signal settle before calibrating each point.
•
If an error occurs during calibration, the 2701 will generate an appropriate error message.
Observe the following safety precautions when performing these tests:

Some of the procedures in this section may expose you to dangerous voltages. Use
standard safety precautions when such dangerous voltages are encountered to avoid
personal injury or death caused by electric shock.

For the front panel terminals only, the maximum common-mode voltage (voltage between
INPUT LO and chassis ground) is 500 V peak. Exceeding this value may cause a
breakdown in insulation, creating a shock hazard.

For the plug-in modules, the maximum common-mode voltage (voltage between any
plug-in module terminal and chassis ground) is 300 VDC or 300 VRMS. Exceeding this
value may cause a breakdown in insulation, creating a shock hazard.

When using the front panel terminals simultaneously with plug-in modules, all cable
insulation voltage ratings must equal or exceed the maximum voltage applied to either
the front panel terminals or the plug-in module terminals.

Calibration code

Before performing comprehensive calibration, unlock calibration by entering the appropriate

calibration code.

2701-902-01 Rev. B / December 2018
Section 2: Calibration
2-3