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9.4 RS232 Commands
The following commands can be sent from a PC to the
WP-89
. Note that <cr>
denotes carriage return and <lf> denotes a line feed.
Action
Command Notes
Request current data
?D<cr>
Returns the current Turbidity data, date
and time from the
WP-89
. The log
number returned is set to Zero.
Data format A
Request logged data
?R<cr>
Returns all logged records from the
WP-89
memory. The data ends with the
message
ENDS
<cr>.
Data format B
Erase logged data
?E<cr>
Erases all logged records from the
WP-89
memory. Returns the message
ERASED
<cr> to confirm that the
records have been erased.
Request status
information
?S<cr>
Returns the model name, the Reference
NTU value, and number of logged
readings in memory.
Data format D
Request instrument
information
?W<cr>
Returns the firmware version in the
NEP160, followed by the meter and
probe (if attached) serial numbers.
Data format E.
See section 9.5 for details of the data formats.