5700A/5720A Series II
Operators Manual
4-4
4-2. Powering on the Calibrator
WWarning
To avoid electric shock, make sure the calibrator is safely
grounded as described in Chapter 2.
Caution
Before turning the calibrator on, make sure that the line voltage
selection switches are set properly for your line voltage. Refer
to Figure 2-3 or to the line voltage switch label and check the
line voltage now if you have not already done so.
When you power on the calibrator, the Control Display appears as shown below and then
displays a series of tests, as the calibrator performs self-tests. If a self test fails, a prompt
on the Control Display identifies the failed test and lets you choose whether to continue
self testing or stop and run self diagnostics. For information about self-diagnostics, refer
to Chapter 3 of the 5700A/5720A Series II Service Manual.
PREV
MENU
After the calibrator passes its self-tests, it powers up to 0V dc in standby, configured for
internal sensing and internal guard, ready to accept an entry from the keypad. The
Control Display now appears as shown below:
PREV
MENU
4-3. Warm Up
The calibrator must always be warmed up, to allow the environmentally controlled
components inside to stabilize, and to ensure that it meets or exceeds the specifications
listed in Chapter 1. Sufficient warmup times are as follows:
• If the calibrator has been powered off for one hour or more, allow at least 30 minutes
of warmup time.
• If the calibrator has been powered off for a length of time less than one hour, allow it
to warm up for at least twice the length of time it was turned off. For example, if it
has been turned off for 10 minutes, allow at least 20 minutes of warmup time.
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