Fluke 8808A User Manual - Page 69

Triggering Output, External Triggering from the Front Panel

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4 Operating the Meter Using the Computer Interface Triggering Output +1.2345E+6(format 1) +12.345E+6 OHM(format 2) +/- 1.0E+9 Measured value of 1.2345M Measured value of 12.345Mohms Overload (0L on the display) Triggering Output The Meter takes measurements when triggered to do so. There are five trigger types, which are described in Table 4-3. Triggers fall into two basic categories: • Internal trigger, which triggers measurements continuously. • External trigger, which triggers a measurement at the direction of the user. A measurement can be externally triggered as follows: • External trigger with rear trigger disabled. This includes trigger types 2 and 3, as described in Table 4-3. • External trigger with rear trigger enabled. This includes trigger types 4 and 5, as described in Table 4-3. • *TRG command For use of the *TRG command, see "Common Commands." Type 1 2 3 4 5 Trigger Internal External External External External Table 4-3. Trigger Types Rear Trigger Disabled Disabled Disabled Enabled Enabled Settling Delay - Off On Off On External Triggering from the Front Panel To enable external triggering from the front panel, perform the following procedure: 1. Press Q then J. Ext Trig and a number corresponding to the selected trigger type (1, 2, 3, 4, or 5) are displayed. See Table 4-3 for trigger types. 2. Press U or V to step through the trigger type list. Highlight the trigger type as follows, and then press R for two seconds to select it. Select trigger type 2 to disable the settling delay; or select trigger type 3 to enable the settling delay. See Table 4-3 for typical settling delays. When trigger type 2 or 3 is selected, Ext Trig is displayed confirming that you are not in the remote mode and an external trigger is enabled. (If you are not in the remote mode, you will not be able to trigger measurements from the front panel.) 3. Press J to trigger a measurement. (Each time you press J you trigger a measurement.) 4. To return the Meter to its internal (continuous) trigger state, perform step 3 and select trigger type 1. 4-9

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Operating the Meter Using the Computer Interface
Triggering Output
4
4-9
+1.2345E+6(format 1)
Measured value of 1.2345M
+12.345E+6 OHM(format 2)
Measured value of 12.345Mohms
+/- 1.0E+9
Overload (
0L
on the display)
Triggering Output
The Meter takes measurements when triggered to do so. There are five trigger types,
which are described in Table 4-3. Triggers fall into two basic categories:
•
Internal trigger, which triggers measurements continuously.
•
External trigger, which triggers a measurement at the direction of the user.
A measurement can be externally triggered as follows:
•
External trigger with rear trigger disabled. This includes trigger types 2 and 3, as
described in Table 4-3.
•
External trigger with rear trigger enabled. This includes trigger types 4 and 5, as
described in Table 4-3.
•
*TRG command
For use of the
*TRG
command, see “Common Commands.”
Table 4-3. Trigger Types
Type
Trigger
Rear Trigger
Settling Delay
1
Internal
Disabled
—
2
External
Disabled
Off
3
External
Disabled
On
4
External
Enabled
Off
5
External
Enabled
On
External Triggering from the Front Panel
To enable external triggering from the front panel, perform the following procedure:
1.
Press
Q
then
J
.
Ext Trig
and a number corresponding to the selected trigger
type (1, 2, 3, 4, or 5) are displayed. See Table 4-3 for trigger types.
2.
Press
U
or
V
to step through the trigger type list. Highlight the trigger type as
follows, and then press
R
for two seconds to select it.
Select trigger type 2 to disable the settling delay; or select trigger type 3 to enable the
settling delay. See Table 4-3 for typical settling delays.
When trigger type 2 or 3 is selected,
Ext Trig
is displayed confirming that you are
not in the remote mode and an external trigger is enabled. (If you are not in the
remote mode, you will not be able to trigger measurements from the front panel.)
3.
Press
J
to trigger a measurement. (Each time you press
J
you trigger a
measurement.)
4.
To return the Meter to its internal (continuous) trigger state, perform step 3 and select
trigger type 1.