Keithley 2750 User Manual page 64

Model 2750 Multimeter/Switch System User's Manual
NOTE
Figure 2-3
System channel operation — closing next or previous measurement channel
Close previous
measurement
channel
CLOSE key (SINGLE menu option)
The SINGLE menu option for the CLOSE key can be used to select a measurement chan-
nel as the system channel
channel:
1.
NOTE
2.
3.
4.
An invalid channel cannot be closed and will cause one of the following error messages to
be briefly displayed:
INVALID CHAN — This message indicates that the channel is not a valid measurement
channel. The following actions will cause this error:
•
•
•
•
The and keys can also be used to open all channels in the mainframe. Sim-
ply increment or decrement the channel number until there is no channel dis-
played.
Close next
measurement
channel
(Figure
Press the CLOSE key. The message "CLOSE:SINGLE" message will be
displayed.
If the "CLOSE:MULTI" message is instead displayed when CLOSE is pressed,
it indicates that there are no measurement modules installed in the mainframe.
See "Multiple channel operation," page
measurement module (i.e., Model 7705).
Press ENTER to display the prompt to close a channel (CLOSE CH: XXX).
Δ ∇
Using , , , and
Press ENTER. The channel closes and the CHAN annunciator turns on.
Trying to close a non-measurement channel, such as a backplane isolation channel,
a channel that sets the pole mode, or a channel that cannot be internally connected
to the DMM.
Trying to close an amps channel while on a non-amps function. The DCI or ACI
function must be selected in order to close an amps channel.
Trying to close a paired-channel while on a 4-wire function. For the Model 7700,
channels 1 through 10 are paired to channels 11 through 20 for a 4-wire function.
If, for example, you try to close channel 12 while on the Ω4 function, the INVALID
CHAN error will occur.
Trying to close a switching module channel that does not exist.
Close/Open Switching Module Channels
2-4). Perform the following steps to select the system
2-15, to close the channels of a non-
, key in the three-digit channel you want to select.
2-9