BNC 1201 - 6 1/2 Digit Digital Multimeter - Manual (Page 115)

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The READ? Command
The READ? Command changes the state of the trigger system from the
“idle” state to the “wait-for-trigger” state. When the specified trigger
condition requirements are met after the multimeter receives the READ?
command, the measurement will be initiated. The results are sent to the
output buffer right away. You must enter the reading data into your bus
controller or the multimeter will stop making measurements when the
output buffer fills. Readings are not stored in the multimeter’s internal
memory when using the READ? Command.
Using the READ? Command has a similar effect as using the INITiate
command followed immediately by the FETCh? command, except
readings are not buffered internally.
The INITiate and FETCh? Commands
These two commands provide the lowest level of control of measurement
triggering and reading retrieval, but offer the most flexibility. After you
have configured the multimeter, use INITiate command to change the
state of the triggering system from the “idle” state to the
“wait-for-trigger” state. The multimeter will start the measurements
when the specified trigger condition requirements are met after it
receives the INITiate command. The results are sent to the internal
memory and stored until you are ready to read them.
The FETCh? command sends the data in the multimeter’s internal
memory to the output buffer where you can read them into your bus
controller.
The SENSe Commands
※ NOTE: Default parameters are shown in bold italic.