User manual

Series 3700 System Switch/Multimeter Reference Manual Section 15: Calibration
3700S-901-01 Rev. C / July 2008 15-5
Make sure to enter the correct date and time using the 24-hour clock. If the date
is incorrect, it will not save the proper date when calibration is saved. For
additional information about this command, see localnode.settime() (on
page 13-215).
Remote calibration procedure
To perform calibration, use the following procedure:
1. Connect the Series 3700 to the IEEE-488 bus of the computer using a
shielded IEEE-488 cable, such as the Keithley Instruments Model 7007,
over the Ethernet, or directly to a computer through the Ethernet port using a
cross-over cable.
2. Turn on the Series 3700 and allow it to warm up for at least two hours
before performing calibration.
3. Make sure the primary address of the Series 3700 is the same as the
address specified in the program that you will be using to send commands
(the GPIB default address is 16; the Ethernet default port number is 23).
4. Turn the TSP
TM
prompt and errors off and unlock the calibration function by
sending the following commands:
SEND localnode.prompts=0
SEND localnode.showerrors=0
SEND dmm.reset()
SEND errorqueue.clear()
SEND dmm.calibration.unlock("KI003706")
NOTE When remotely changing the unlock code, send the
dmm.calibration.unlock() (on page 13-122) command
twice, first with the present code, then with the new code.
5. Check for errors after sending each calibration command by using the
following command:
SEND print(errorqueue.count)
6. Send each calibration command with print ("done") appended to allow
the program to know when operation is complete. Some calibration steps
may take up to five minutes to perform, so the communication time-out
setting should be adjusted, because otherwise time-out errors might occur.