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Reference Multimeter and 8 ½ Digit Multimeter
Triggering Measurements
117
Example 1
Measurement: Take a number of measurements after a delay. Take 10
measurements each time you push and have the Product wait 5 seconds
after the key push so that you can get away from the sensitive measurement
setup.
Solution: From the trigger default state, push to stop readings. In the
Trigger Setup menu, set the Triggers/Arm (Count) to 10. Under the Extended
Settings, set the Arm1 delay to 5 seconds. Push to take the Trigger
subsystem out of Idle. The Trigger subsystem waits 5 seconds, takes 10
readings, and then stops.
This works by enforcing a delay in a layer prior to the one where the 10 readings
are then captured.
Example 1b
Measurement: Example 1 discards the previously captured readings for each
push of , as noted by Rdgs in the Statistics function, which starts from 0
with each push of .
If the requirement is to accumulate a set of readings with each push of ,
use the 1b solution below.
Solution: From the Trigger Setup, push (Reset to Defaults). Do not push
because you want the Initiate layer to be in Continuous ON. Set the
Triggers/Arm (Count) to 10 as in Example 1. In the Extended Settings, set the
Arm1 event to Manual, and the Arm1 Delay to 5 seconds. With each push of
, the Trigger subsystem waits 5 seconds, and takes 10 readings,
accumulating each set of 10 readings. (Note the Rdgs count in Statistics with
each push of .)
This works by having the TRIG key as a layer source Event, rather than using it
for the Trigger subsystem initiation as in Example 1. Leaving the Initiation layer in
Continuous ON means the Trigger subsystem remains in the free-run, initiated
state. Since it is the initiation event that discards the previous readings, they are
retained on subsequent cycles.
Note
Setting the trigger event to Manual in the trigger layer, instead of the
Arm1 layer, will not give 10 readings with each push of .
must be pushed 10 times to get 10 readings.
Examples 1 and 1b use the Arm1 and Trigger layers. Since the object was
merely to have the delay before the count, any two layers could have been used
provided the delay was in the one that comes earliest in the Trigger subsystem
sequence (Arm2 -> Arm1 -> Trigger). Although in the example given it makes no
difference, when operating at the maximum speeds supported by the Digitize
function, starting at the Trigger layer and working up to Arm1 and Arm2 as
required will give the best performance.
121


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