Keithley 2701, Service Manual

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Model 2701 Service Manual Routine Maintenance 3-7
Plug-in module relay closure count
The Model 2701 keeps an internal count of the number of times each module relay has been
closed. This count will help you determine if and when any relays require replacement (see
module contact life specifications). The count can be read or reset only via remote as outlined
below.
Closure count commands
Table 3-2 summarizes closure count commands.
Reading relay closure count
To determine the closure count of specific channels, send this query via remote:
:ROUTe:CLOSe:COUNt? (@clist)
Here, clist is the summary of channels. For example, to determine the closure count of
channels 1 and 4 of a module in slot 1, the following query would be sent:
:ROUT:CLOS:COUN? (@101,104)
The following query would determine the closure count of slot 1 module channels
1 through 10:
:ROUT:CLOS:COUN? (@101:110)
Table 3-2
Closure count commands
Command Description
:ROUTe
:CLOSe
:COUNt? (@clist)
:INTerval < NRf>
:INTerval?
:RCOunt (@clist)
Route subsystem.
Path to CLOSe commands.
Query count for channels in clist (channel list).
Set count update interval in minutes (1 to 1440).
Query count update interval.
Reset count for channels in clist.*
* Unit must be in manufacturing calibration mode. See text below.