Keithley 6487 Reference Manual page 122

7-14 Triggering
The trigger link connections for this test system are shown in
of the Model 6487 is connected to the trigger link (IN or OUT) of the switching main-
frame. Note that with the default trigger settings of the switching mainframe, line #1 is an
input and line #2 is an output.
Figure 7-8
Trigger link connections
7001 or 7002 Switch System
For this example, the Model 6487 and switching mainframe are configured as follows:
Model 6487
Factory Defaults Restored
Trig-In Event = TLink
Trigger Input Line = #2
Trigger Output Line = #1
Trigger Output Event = ON
Trigger Count = 10
Trigger Delay = Auto
To store readings in the Model 6487 buffer, first set the number of points to store in the
buffer:
1.
2.
3.
4.
To start the test, press STEP on the switching mainframe to take it out of idle and start the
scan. The switching mainframes output pulse triggers the Model 6487 to take a reading
and store it. the Model 6487 then sends an output trigger pulse to the switching mainframe
to close the next channel. This process continues until all 10 channels are scanned, mea-
sured, and stored.
MADE IN USA
IN
OUT
Trigger
Link
Press CONFIG and then STORE.
Set the buffer size to 10 using the RANGE and cursor keys.
Press ENTER.
The next time STORE is pressed, the asterisk (*) annunciator turns on to indicate
the buffer is enabled. (See the Model 6487 User's Manual for buffer details.)
Model 6487 Picoammeter
MADE IN
U.S.A.
CAT I
ANALOG OUT
!
505V PK
505V PK
505V PK
TRIGGER LINK
INPUT
V-SOURCE OUTPUT
505V PK TO CHASSIS
LO HI INTERLOCK
505V
MAX
Trigger Link Cable
(8501)
Switching Mainframe
Factory Defaults Restored
Scan List = 1!1-1!10
Number of Scans = 1
Channel Spacing = TrigLink
Model 6487 Reference Manual
Figure 7-8. The trigger link
IEEE-488
(CHANGE IEEE ADDRESS
DIGITAL I/O
WITH FRONT PANEL MENU)
RS-232
!
LINE RATING
50, 60Hz
FUSE LINE
50 VA MAX
400mAT 100 VAC
(SB) 120 VAC
220 VAC
200mAT
240 VAC
(SB)
Trigger
Link