Section 3: Basic DMM operation
Model 2110 5½ Digit Multimeter Reference Manual
3-30
2110-901-01 Rev. C/August 2013
Measurements begin when the instrument leaves the Idle state and then receives a trigger while in
the Wait-for-event state.
The reading rate depends on the trigger delay setting, integration time setting, and other instrument
settings. See
Setting trigger delay using remote operation
(on page 3-35) to set the trigger delay.
Sample and trigger counters determine the number of measurements that are performed.
•
The sample count is the number of measurements to perform for each trigger event.
•
The trigger count is the number of trigger events the instrument accepts before entering the Idle
state.
The number of measured readings is the product of the trigger count and sample count. For example,
if the trigger count is 10 and the sample count is 20, the total number of measurements is 200 (20 x
10).
See
Setting sample count using remote operation
(on page 3-33) to set the counters.
Triggering example:
Assume the sample count is 10 and the trigger count is two (2). The instrument will accept two trigger
events. Upon receiving the first trigger, 10 measurements are performed. When the second trigger is
received, 10 more measurements are performed. The instrument then returns to the idle state.
Trigger sources
There are three trigger sources for remote operation: Immediate, software (or bus), and external.
Immediate triggering
When the instrument is in the immediate trigger mode, a trigger is internally generated immediately
after it goes into the "wait-for-event" state.
The internal immediate trigger mode is only available using remote operation, and is the default
setting for the remote interface.
Use the following command to select internal immediate triggering:
TRIGger:SOURce IMMediate
Software triggering
Software triggering is similar to external triggering. Instead of using the
TRIGGER
key on the front
panel, a command generates a trigger event.
Use the following command to select the software trigger source:
TRIGger:SOURce BUS
Use the following command to take the instrument out of the idle state and into the "wait-for-event"
state:
INITiate
Use the following command to generate a trigger event:
*TRG
