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Section IV – Operating Instructions
WARNING: FAILURE TO REMOVE THE SOURCE OF INPUT OVER VOLTAGE BEFORE RESTORING NORMAL
INSTRUMENT OPERATION MAY CAUSE SERIOUS DAMAGE TO THE INSTRUMENT!
NOTE: Although the over voltage circuits protect the instrument from substantial excessive voltages at its
inputs, it cannot protect the instrument against damage from extremely high voltage spikes that can occur
when the over voltage condition is transient in nature and the voltage spikes are very high due to
inductive spiking. For this reason, great care should be taken when using the instrument in high-
sensitivity modes (especially on ranges of 1 mV and lower) with very high measurement differential
voltages.
Normal Operation
Normal calibration laboratory practice dictates that the environment should be closely controlled. This will
minimize errors introduced by temperature and humidity changes. A nominal temperature of +20°C
provides a good working condition. A tolerance of ±5°C gives allowable temperature spread. Controlled
temperatures also stabilize the aging process of the standards.
