Plug-In Module Relay Closure Count; Closure Count Commands - Keithley SourceMeter 2790 Reference Manual

Model 2790 SourceMeter
Replace the battery as follows:
1.
2.
3.
4.
5.
6.
7.

Plug-in module relay closure count

The Model 2790 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 replace-
ment (see module contact life specifications). The count can be read or reset only via
remote as outlined below.

Closure count commands

Table 18-2
Table 18-2
Closure count commands
:ROUTe
:CLOSe
:COUNt? (@clist)
:RCOunt (@clist)
* Unit must be in manufacturing calibration mode. See Note on
®
Switch System Reference Manual
Remove the Model 2790 top cover
Locate battery BT100.
De-solder the battery from the top side of the circuit board.
Install a new battery, Keithley part number BA-51, taking care to observe proper
polarity.
Solder the battery connection to the circuit board using organic (OA-based) flux
solder.
After soldering, remove all flux using a foam-tipped swab or brush dipped in pure
water. Blow-dry the board with dry nitrogen gas, then allow the board to dry for
several hours in a 50°C, low-humidity environment before use.
Re-install the top cover.
summarizes closure count commands.
Command
Route subsystem.
:INTerval < NRf>
:INTerval?
Description
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.*
page 18-10.
18-9