Section 4: Close-open overview
Series 3700 System Switch/Multimeter User's Manual
4-22
3700S-900-01 Rev. C / July 2008
Relay closure count
The Series 3700 keeps an internal count of the number of times each switching
module relay has been closed. The total number of relay closures is stored in
nonvolatile memory on the switching module. Use this count to determine when
any relays require replacement (see the specific module's contact life
specifications).
Relay closures are counted only when a relay transitions from open to closed
state. If you send multiple close commands to the same channel without sending
an open command, only the first closure will be counted.
To view the close counts for channels 1 to 5 on Slot 2 using the remote
command interface, send the following ICL command:
count=channel.getcount("2001:2005")
print(count)
This would output a comma-delimited list of the five close counts (2001 through
2005). See the ICL
channel.getcount
for more information.
To view the close counts for channel 5 on the card in Slot 1 using the front
panel keys:
1. Select channel 1005 using the navigation wheel.
2. Press the
CONFIG
key.
3. Press the
CHAN
key.
4. Use the navigation wheel to scroll to the "COUNT" menu item.
5. Press the
ENTER
key
(or the navigation wheel) to display the close counts
for Channel 1005.
6. Use the
EXIT
key
to leave the menu.
NOTE
You can query the backplane relay closure count only using the
remote command interface, but not on the front panel.