User manual

Section 14: Verification Series 3700 System Switch/Multimeter Reference Manual
14-2 3700S-901-01 Rev. C / July 2008
NOTE If the instrument is still under warranty and its performance is outside
specified limits, contact your Keithley Instruments representative or
the factory to determine the correct course of action.
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 the verification procedures in a location that has:
An ambient temperature of 18°C to 28°C (65°F to 82°F)
A relative humidity of less than 80%, unless otherwise noted
Warmup period
NOTE At the factory, units are calibrated without any switch cards installed
and all slots are covered with blank slot covers. The slot covers come
installed on the unit when it is shipped.
If it is more convenient to calibrate the unit with switch cards installed,
make sure all channels are open and any empty slots are covered
with blank slot covers.
Allow the System Switch/Multimeter to warm up for at least two hours before
performing calibration.
If the instrument has been subjected to temperature extremes (those outside the
ranges stated in Environmental conditions (on page 14-2)), allow extra time for
the instrument‟s internal temperature to stabilize. Typically, you need to 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.