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The calibrator may be controlled using commands and queries. All
commands may be entered using upper or lower case. The
commands are divided into the following categories:
Calibrator Commands
Only the calibrator uses these commands. For example
VAL?
asks for the values displayed on the calibrator display.
Common Commands
Standard commands used by most devices. These commands
always begin with an “*”. For example
*IDN?
tells the calibrator to return its identification.
Query Commands
Commands that ask for information, they always end with a “?”. For
example:
FUNC?
Returns the current modes of the calibrator displays.
Compound Commands
Commands that contain more than one command on one line. For
example;
PRES_UNIT LOWER, PSI, PRES_UNIT?
Sets the pressure units to PSI and queries it to verify. It will return:
PSI, PSI, PSI
9.4.2 Character Processing
The data entered into the calibrator is processed as follows:
• ASCII characters are discarded if their decimal equivalent is less
than 32 (space), except 10 (LF) and 13 (CR):
• Data is taken as 7-bit ASCII
• The most significant data bit is ignored.
• Upper or lower case is acceptable.
9.4.3 Response Data Types
The data returned by the calibrator can be divided into four types: