Keithley 6521, Instruction Manual, Page: 31 / 65

Operation
3-3
3.4.3 Closing and opening channels
Closing channels
1. Press the CARD button. The instrument will display the
following:
SCANNER OPTION
CHANNEL-CLOSURES PERFORM-SCAN
2. Select CHANNEL-CLOSURES, then press ENTER.
The following will be displayed:
CHANNEL SELECTION
CLOSE-CHANNEL OPEN-ALL-CHANNELS
3. Choose CLOSE-CHANNEL, then press ENTER, and
note the unit prompts you for the channel to close:
ENTER CHAN#01 (1-10)
4. Using the range keys, choose the channel to close, then
press the ENTER key.
5. The selected channel will close, and the instrument will
return to normal measurement display.
Table 3-2
Card configu ation menu
Menu item* Description
CONFIGURE SCANNER
INTERNAL
CHANNELS
SCAN-MODE
VSRC-LIMIT
SETTLING-TIME
EXTERNAL
Set up scanning operation.
Configure internal scanne .
Select channels in scan list.
Select voltage or current mode.
Select voltage source limit.
Set settling time.
Configure xternal scan.
* Access card configuration menu by pressing CONFIG then CARD
Opening channels
1. Press the CARD button. The instrument will display the
following:
SCANNER OPTION
CHANNEL-CLOSURES PERFORM-SCAN
2. Select CHANNEL-CLOSURES, then press ENTER.
The following will be displayed:
CHANNEL SELECTION
CLOSE-CHANNEL OPEN-ALL-CHANNELS
3. Choose OPEN-ALL-CHANNELS, then press ENTER.
4. The closed channel will open, and the instrument will
return to normal measurement display.
NOTE
Any closed relays will open if the Model
6517 power is turned off.
Table 3-1
Scan control menu
Menu item* Description
CHANNEL CLOSURES
CLOSE-CHANNEL
OPEN-ALL-CHANNELS
PERFORM-SCAN
EXTERNAL
INTERNAL
Close channel manually.
Close selected channel.
Open all closed channels.
Perform internal or external scanning.
Scan with external scanner.
Scan with 6521/22.
* Access scan control menu with OPTION CARD key.