6 Calibration
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6-3
6.5 Important Steps prior to Calibration
The following items must be taken care of before the calibration procedure is started:
1.
The calibration environment should be at a stable temperature of at least
18°C (64.4°F), but no more than 28°C (82.4°F). Ideally, the temperature
should be 23 ±1°C (73.4°F). In order to prevent erroneous measurements
due to temperature fluctuations, you can wrap the connectors at the unit in a
heat-insulating cloth (like a dust cloth).
2.
There must be a 2-hour warm-up period before the calibration is started.
3.
Make certain, that the measurement connectors are set to front operation .
If the connectors are set to rear operation, switch them to front operation, as
described in the chapter “Getting Started.”
5.
An offset correction must be carried out for every measurement range of
every measurement function.
If you are working with a multifunction calibrator, the offset correction is
carried out when the unit is already connected to the calibrator, and the
calibrator is set to “Zero” (the calibrator’s zero-point).
It is important, however, that the true unit zero-point be set after calibration,
by using the short-circuit terminators on the 5017 front input connectors.
6.
Wherever possible, use shielded cables, as short as possible, and with gold-
plated connectors. In this manner, you can make certain that the
thermoelectric voltage at the measurement connectors is kept as small as
possible.
7.
After connecting a cable, or after changing the measurement function or
range, you should wait at least one minute, before the first measurement
value is read.
