Chapter II
38
Benchtop multimeter
5.4.1.3. Request dialogue
PC
DMM
Meaning
5.4.1.4. Breaking the link
If the PC sends the ASCII ESC (1BH) code, the repetitive measurements sent by the
multimeter will be interrupted, even if it is sent during one of the measurements.
5.4.2. Message contents
In the following, characters expressed in ASCII are shown between double quotes and
hexadecimal values are terminated by an H.
Messages from the PC consist of a sequence of codes, representing ASCII characters and
a carriage return (ODH) acting as a terminator.
First character
this is a “foreword” which defines the message type
First character = “2” (32H)
Initializes the DMM configuration (command message)
First character = “3” (33H)
Initializes a measurement or check requests (request message)
Instruction
PC: "Give me some data?"
ENQ
Answer 1
DMM : "It is...!"
ACK
1st caract.
2nd caract.
3rd caract.
Terminator
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