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Model 6517B Electrometer Reference Manual
External scanning
When using external scanning, you can configure the Model 6517B to measure up to 400 channels.
In order to synchronize Model 6517B measurements with external channel closure, connect the
Model 6517B trigger link to the external switching mainframe trigger link (see
1)).
Use the following information to configure the Model 6517B for external scanning, and to start the
external scan. Refer to the documentation supplied with the switching mainframe and the scanner
card for specific configuration and connection information.
The following procedure uses menu structures to configure the instrument for external scanning.
1. Set up the Model 6517B for the desired measurement (for example, set function, range, etc.).If
there is no card installed in the option slot of the Model 6517B, external scanning is automatically
be selected. If there is a card installed in the option slot, you must select external scanning as
explained in the following step:
2. Press CONFIG and then CARD, and perform step a or b.
b.
Card installed in option slot: Select the EXTERNAL-INPUTS (CHANNELS) option from the menu and
then specify the number of external channels (inputs) to scan. After entering the value, press ENTER.
Use the EXIT key to back out of the menu structure.
3. Press the CARD key and perform step a or b.
b.
Card installed in option slot: Select the PERFORM-SCAN option from the menu and select EXTERNAL
scanning. The CHANNEL-CLOSURES option is used to open/close channels on the scanner card
installed in the option slot. For details, see the instruction manual for that card. The displayed message
prompts you to reset the external scanner. Press ENTER when ready.
4. The next message prompts you to set the channel count (CHAN COUNT) of the external scanner
to infinite. Press ENTER when ready.
5. The next message prompts you to select the trigger source for the Model 6517B:
SELECT TRIG SOURCE
TRIGLINK EXTERNAL TIMER GPIB
MANUAL IMMEDIATE
These trigger sources are explained in
6. The next message prompts you to set the external scanner to the trigger source that you selected
in step 5 for the Model 6517B. Press ENTER when ready.
7. The next message prompts you to set the scan list of the external scanner for the appropriate
number of channels. This is the same number of external inputs that was specified in step 2.
Press ENTER when ready.
8. The next message prompt you to STEP the external scanner to the first channel. Press ENTER
when ready.
9. The next message prompt you to set the scan count for the Model 6517B. The scan count
specifies how many times you wish to repeat the scan. For example, if the scan list has 40
channels, and the scan count is 5, then 40 channels are scanned five times. Press ENTER when
ready.
10. The next message asks if you wish to use the scan timer of the Model 6517B. If you selected
TIMER as the trigger source in step 5, select YES. You are then be prompted to enter the interval
between triggers (0.001 second to 999999.999 seconds). Otherwise, select NO.
6517B-901-01 Rev. C / August 2015
a.
Option slot empty: You are prompted to specify the number of external channels (inputs) to
scan. After entering the value, press ENTER.
a.
Option slot empty: The displayed message prompts you to reset the external scanner. Press
ENTER when ready.
Section 10: Limits, digital I/O, and scanning
Triggering
(on page 7-1).
Triggering
(on page 7-
10-11
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