Factory Service; Verification Test Requirements; Environmental Conditions; Warmup Period - Keithley DMM7510 Calibration Manual

Section 2: Performance verification

Factory service

If the instrument is to be returned to Keithley Instruments for repair, perform the following:
•
Call the Repair Department at 1-800-833-9200 or send an email to RMAREQUEST@tek.com for
a Return Material Authorization (RMA) number.
•
Carefully pack the instrument in the original packing carton.
•
Write ATTENTION REPAIR DEPARTMENT and the RMA number on the shipping label.

Verification test requirements

Be sure that you perform these verification tests:
•
Under the proper environmental conditions
•
After the specified warmup period
•
Using the correct line voltage
•
Using the proper test equipment
•
Using the specified output signal and reading limits

Environmental conditions

Conduct your performance verification procedures in a test environment with:
•
An ambient temperature of 18 °C to 28 °C (65 °F to 82 °F).
•
A relative humidity of less than or equal to 80 percent, unless otherwise noted.

Warmup period

Allow the Model DMM7510 to warm up for at least 90 minutes before conducting the verification
procedures.
If the instrument has been subjected to temperature extremes (those outside the ranges stated
above), allow additional time for the internal temperature of the instrument to stabilize. Typically, allow
one extra hour to stabilize a unit that is 10 °C (18 °F) outside the specified temperature range.
Also, allow the test equipment to warm up for the minimum time specified by the manufacturer.

Line power

The Model DMM7510 requires a line voltage of 100 V to 240 V and a line frequency of 50 Hz or
60 Hz. Verification tests should be performed within this range.
The instrument automatically senses the line frequency at power up.
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Model DMM7510 7½ Digit Graphical Sampling Multimeter Calibration Manual
DMM7510-905-01 Rev. A / April 2015