Lake Shore Model 420 Gaussmeter User’s Manual
Remote Operation
4-3
4.1.4 Notes On Using The Serial Interface
• To chain commands together, insert a semi-colon (
;
) between them. Multiple queries cannot be chained.
• Queries generally use the same syntax as the associated setting command followed by a question mark. They usually
return the same information that is sent.
• Add a query to the end of a command string to confirm command execution. For example,
UNIT G;UNIT?
commands
the Model 420 to set units to gauss then requests the Model 420 return the units to confirm the change.
• A correctly spelled query without a "?", returns nothing. Misspelled commands and queries are ignored
• The
term
free field
indicates a decimal point floats and can be placed at any appropriate place in the string of digits.
• Leading zeros and zeros following a decimal point are unneeded in a command string, but they are sent in response to
a query. A leading “+” is not required, but a leading “–” is required.
•
[term]
indicates where the user places terminating characters or where they appear on a returning character string
from the Model 420.
• The following commands are available only over the computer interface; there are no front panel equivalent
commands:
CODE
,
BRIGT
,
FAST
, and
SNUM
.
• To change number inputs to the field reading resolution, first set them to zero.
Summary of Contents for 420
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