THORLABS PRO800 Series, Operation Manual

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62 Communication with a PC
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© 2012 Thorlabs
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Errors while using the data read-out commands “ :ELCH:GETALL? ” or
“ :ELCH:TRIG? ”
e.g.: “ Timeout expired before operation completed ”
or
e.g.: “ The number of bytes transferred is equal to
the input count ”

Timeout value to small .

Input buffer too small.

You don’t get out all measured data : Perhaps your measurement is still
in progress. Either test the ELCH status (see 4.7.7) or use the
“
:ELCH:GETALL? ” command again to retrieve the rest of the data.

Your retrieved data do not start with the expected first set value:
Maybe you had another ELCH run previous and did not read out the old
data.
Start your ELCH run with the
:ELCH:RESET 0 command, to discard
previous measured values.