Section 9: Frequently asked questions (FAQs)
Model DMM7510 7½ Digit Graphical Sampling Multimeter Reference Manual
9-10
DMM7510-901-01 Rev. B / May 2015
Why do I see the "Query unterminated" error?
This error occurs when you address the instrument to talk and it has nothing to say. The most likely
causes are:
•
A query was not sent. You must send a valid query to the instrument before addressing it to talk.
You cannot get a reading until you send the instrument a query.
•
An invalid query was sent. If you sent a query and get this error, make sure that the instrument is
processing the query without error. For example, sending a query that generates an "Undefined
header" error and then addressing the instrument to talk will generate a "Query unterminated"
error.
•
A valid query in a command string that also contains an invalid command. This can occur when
you send multiple commands or queries in one command string (program message). When the
instrument detects an error in a command string, it discards all further commands in the
command string until the end of the string. For example, this command string would result in a
query unterminated error:
:sens:date?;:sens:func?
The first command (
:sens:date?
) generates error -113, "Undefined header" and the instrument
discards the second command (
:sens:func?
), even though it is a valid query.
