Scan Procedure - Keithley 7002-HD User Manual

Model 7002-HD User's Manual
will primarily be determined by the internally set relay settling time and any user
programmed delay. The user programmed delay is in addition to the relay settling
time.

Scan procedure

Perform the following steps to scan channels:
Step 1. Press OPEN ALL.
Before configuring a scan, place the Model 7002-HD in the idle state by pressing
OPEN ALL. This will stop any scan that is currently in process, open all channels,
and place the Model 7002-HD in the idle state.
Step 2. Select the scan list.
The channel list must be selected in order to close channels. The SCAN LIST key
toggles between the scan list and the channel list. If the scan list is not currently
selected, press SCAN LIST. The following scan list prompt is displayed:
SCAN CHANNELS
Step 3. Define scan list.
Enter channels into the scan list. The following example demonstrates proper for-
mat:
SCAN CHANNELS 1!1, 4!1-4!10, M1,
The above scan list includes channel 1 of slot 1, channels 1 through 10 of slot 4,
and the channel pattern stored at memory location 1 (M1).
Channels will be scanned in the order they are presented in the scan list. Channel
pattern M1 will be treated as a single channel entry. When the channel pattern is
scanned, the closed channels in the pattern will close and remain closed for the
duration of the scan. A channel pattern is useful for supplying bias voltages in a
test system.
At the conclusion of a scan, the last channel in the list will remain closed. If you
wish to open the last channel, specify a memory location that has no closed chan-
nels as the last entry in the scan list. For example, if in the above scan list M1 has
no closed channels, Channel 4!10 will open at the conclusion of a single scan.
Step 4. Configure the Channel Layer of the scan.
The channel layer is programmed from the CHAN CONTROL menu of the
CONFIGURE SCAN menu.The following procedure summarizes the steps to
configure the channel layer:
1.
2.
From the CONFIGURE SCAN menu, select CHAN CONTROL.
From the CHANNEL CONTROL menu, select CHANNEL SPACING.
Return to
Section 4 topics
Front Panel Operation 4-13