Hioki ST4200 Instruction Manual page 89

IMPORTANT
Re-execute zero-adjustment in the following cases:
After cycling the instrument
After initializing the instrument
When the ambient temperature has significantly changed
The zero position may drift.
Drift
A phenomenon where a shift in the operating point of an operational amplifier causes a change in
output. Drift can result from a change in temperature and component aging over a period of use.
HIOKI ST4200B971-00
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