Fluke 8845A - Using the READ? Command; Using the Initiate Command; Using the Fetch? Command; Using the Sense Subsystem to Configure the Meter

Digital Multimeter
Supported SCPI Commands
41
Using the READ? Command
READ?
Description READ? causes the Meter to take a measurement the next time the trigger
condition is met after the READ? command is received. After the
measurement is taken, the reading is placed in the output buffer. The
READ? command will not cause readings to be stored in the Meter’s
internal memory.
All measurements are sent to the output buffer until the buffer becomes
full, at which point the Meter stops taking measurements. To keep the
measurements running, measurements must be continually read out of the
output buffer.
Note
Always process the reading(s) from the output buffer after each READ?
command. Failure to do so may cause some of the data from the previous
READ? command to appear in the response for the last READ? command.
For those times the buffer cannot be read after a READ? command, send a
device clear (DC1) before issuing another READ? command.
Using the INITiate Command
Once the Meter has been configured for a measurement, the INITiate command causes
the Meter to take a measurement when the trigger conditions have been met. The
measurement reading(s) are placed in the Meter’s internal memory (up to 5,000 readings)
to be read at a later time with the FETCh? command.
With one exception, the INITiate command stops the Meter from accepting any other
remote commands until the Meter has completed both taking the measurement and
storing the reading. The exception occurs when the trigger source is set to BUS with the
TRIGger:SOURce command. Under this condition, the *TRG command or the IEEE 488
Group Execute Trigger will be processed to start the measurement.
Using the FETCh? Command
To process readings from the Meter’s internal memory to the output buffer, send the
Meter a FETCh? command. With readings in the output buffer, a bus controller can then
retreieve the readings over the bus.
Using the SENSe Subsystem to Configure the Meter
Setting Meter functions and function parameters are controlled through the SENSe
subsystem of commands. Both primary and secondary display functions are set using the
FUNCtion commands. The parameters of each Meter function are also controlled through
this subsystem of commands.