HP 3468A - Page 24

The thermal stability of the measurement environment is also a very important
consideration. If you are making measurements in a stable temperature environ-
ment, disabling the autozero function can nearly double the reading rate with
almost no loss in accuracy. Any range or function change that takes place is
automatically accompanied by an autozero update which removes any ac-
cumulated offsets.
Other Factors Ir
sncing the Reading Rate
1. You can speed the reading rate by selecting a fixed range instead of allowing
the multimeter to autorange every reading.
2. AC voltage measurements have a built-in 600mS settling time. Resistance
measurements can be made as fast as DC voltage measurements except on the
3Mohm and 30Mohm ranges where a settling time (20mS and 200mS respective-
ly) is needed for accurate measurements.
3. The maximum possible reading rate is with 3 1/2 digits displayed, autozero
off,
any
DC
voltage
function,
60
Hz
power
selected,
manual
range,
a
positive
voltage measured, and internal trigger selected.
4. It is important to note that even though the 3468A may be taking readings
at a faster rate, the display is only updated at a maximum rate of five times per
second. Faster reading rates are intended for and only accessible through HP-IL.
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