Using Chan Key To Close And Open Internal Channels; Channel Selection Menu Structure; Table - Keithley 2002 User Manual

Front Panel Operation
2.11.3 Using CHAN key to close and open internal
channels
The CHAN key controls channels on the internal scanner
card only. The CHAN key allows you to directly:
• Close a specific channel (or channel pair for 4-wire
functions).
• Immediately open any internal closed channel (or chan-
nel pair for 4-wire functions).
Channel selection menu
Table 2-38 summarizes the channel selection menu structure
along with a brief description of each item. More detailed
descriptions of these menu items are presented in the follow-
ing paragraphs. See paragraph 2.3.4 for general rules on nav-
igating menus.
With a scanner card installed in the option slot of the Model
2002, the following options are available when CHAN is
pressed:

Table 2-38

CHANNEL SELECTION menu structure

Menu item
CLOSE-CHANNEL
OPEN-ALL-CHANNELS
Note: This menu is only available with a scanner card installed.
2-78
ENTER CHAN#01 (1-10)
CLOSE-CHANNEL: This menu item prompts you to enter
the channel (from 1 to 10) that you wish to close. Use the
cursor keys ( and
display the channel and press ENTER. The number of the
closed channel will be displayed on the front panel along
with normal readings.
Selecting a different channel from the one that is presently
closed will cause the closed channel to open and allow a set-
tling time before closing the selected channel.
Channel relays will be closed according to the presently
selected function. If a 2-wire function is used, only the relay
for that one channel will be closed. If a 4-wire function is
selected, both the selected channel relay and the matching
relay pair will close. For example, closing channel 2 will also
close the channel 7 relay. Fixed 4-pole relay pairs are:
• 1 and 6 (not available for Model 2001-TCSCAN)
• 2 and 7
• 3 and 8
• 4 and 8
• 5 and 10.
OPEN-ALL-CHANNELS: Selecting OPEN-ALL-CHAN-
NELS will immediately open any closed scanner card chan-
nels or channel pair for 4-wire functions.
Description
Close channel menu:
Use cursor, range, and ENTER keys.
Press ENTER to open closed channel(s).
) and the RANGE and keys to