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10-12 Triggering Models 2500 and 2502 User’s Manual

Switching mainframe setup

Step 1. Restore bench defaults.

Press the MENU key, select SAVESETUP, and then press ENTER. From the

SAVESETUP menu, select RESET, then press ENTER. Press ENTER to conﬁrm the

action. Press ENTER to return to the SETUP MENU. Press EXIT to leave the SETUP

MENU. Press EXIT to leave the MAIN MENU.

Step 2. Set up scan list: 1!1 - 1!10.

Press the SCAN LIST key. Press 1, 1 - 1, 1, 0, then press the ENTER key.

Step 3. Set the number of scans to 1.

Press the SCAN key, select SCAN-CONTROL, and then press ENTER. From the SCAN

CONTROL menu, select NUMBER-OF-SCANS, then press ENTER. Select ENTER-

SCAN-COUNT, then press ENTER. Set the count to 1, then press ENTER. Press the

EXIT key to return to the CONFIGURE SCAN menu.

Step 4. Set channel spacing to trigger-link.

Select CHAN-CONTROL from the CONFIGURE SCAN menu, then press ENTER.

Select CHANNEL-SPACING from the CHANNEL CONTROL menu, then press

ENTER. Select TRIGLINK, then press ENTER. Select ASYNCHRONOUS, then press

ENTER. Press ENTER, ENTER, then EXIT, EXIT, EXIT to leave the CONFIGURE

SCAN menu.

Operation

1. To store the readings in the Model 2500 buffer, press STORE, and set the buffer size

for 10. When ENTER is pressed, the asterisk (*) annunciator will turn on to indicate

the buffer is enabled. See Section 8 for details.

2. Turn the Model 2500 OUTPUT ON. The Model 2500 waits for an external trigger

from the switching mainframe.

3. Press STEP on the Model 7001/7002 to take it out of idle and start the scan. The scan-

ner's output pulse triggers the Model 2500 to take a reading and store it. The Model

2500 then sends a trigger pulse to the switching mainframe to close the next channel.

This process continues until all 10 channels are scanned, measured, and stored.

Details of this testing process are explained in the following paragraphs and are referenced

to the operation model shown in Figure 10-7.

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Keithley 2500 User Manual

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