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5700A/5720A Series II Calibrator
Service Manual
4-12
2. Follow the access procedures to remove the digital side cover.
3. Remove the CPU Assembly (A20).
4. Desolder and remove battery BT1.
5. Solder a replacement battery in place (refer to the parts list for replacement
information if necessary.)
6. Replace the CPU Assembly. After replacing the battery, the setting of the time and
date the elapsed time counter (read by the remote query ETIME? and set by ETIME)
will need to be reprogrammed.
4-22. Using Remote Commands Reserved for Servicing
This information documents remote commands not described in the 5700A/5720A Series
II Operator Manual, Section 5. The commands described here are useful for servicing the
instrument.
4-23. Using the ETIME Command
The ETIME remote command is the companion to ETIME?, the elapsed time query,
which is documented in the Operator Manual. The ETIME? query tells you how many
minutes the Calibrator has been in the power on state since the instrument was built. If
you replace the CPU Assembly (A20), the clock/calendar battery (BT1), or the
clock/calendar IC (U33), you will lose the setting of ETIME. The ETIME command
gives you a way to set this counter to where it was before servicing the instrument. (If
possible, read the counter first using ETIME?.) The syntax for this remote command is
as follows:
ETIME
Description:
Sets the elapsed time counter to any number of minutes from 0 to 2,147,483,647. The
setting of this counter is read by the ETIME? query, described in the 5700A/5720A
Series II Operator Manual. (Sequential command.)
Parameter:
1. SET_TO
2. Integer, number of minutes
Example:
ETIME SET_TO, 4628000
Using The Fatality? and Fatalclr Commands
The FATALITY? query recovers fault codes that were logged when a fatal problem
occurred. These faults are logged into a separate fault queue. Once the faults are read
from the queue, you can clear the queue by sending the FATALCLR command. The
syntax for these remote commands are as follows: