User Guide

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The commands available are as follows:
MOD - to request the firmware code of the meter.
GLP - to request the last calibration data.
The meter answers with the following order:
pH calibration status (0=not calibrated , 1=calibrated)
pH calibration date (ddmmyy)
pH calibration time (hhmm)
pH electrode offset
pH electrode slope
pH buffer 1
pH buffer 2
mV calibration status (HI98150 only;1=calibrated,0=not calibr.)
mV calibration date (ddmmyy; HI98150 only)
mV calibration time (hhmm; HI98150 only)
mV buffer 1 (HI98150 only)
mV buffer 2 (HI98150 only)
mV buffer 3 (HI98150 only)
If an item is not available (e.g. buf 3 in case of a two points
mV calibration) the character "N" will be received.
PAR - to request the setup parameters setting.
The meter answers with a 6-character string for each param-
eter.
LTB - to request the number of logged samples.
LOD - to request the logged data.
The meter answers with the following order:
status byte
date (ddmmyy)
time (hhmm)
pH reading (binary)
mV reading (binary; HI98150 only)
temperature reading (binary)
At the end of the logged data the checksum (2 complement)
is sent.
Note: The meter will send <CAN> if a corrupted or unknown
command is received.
These commands may be sent with either capital or small letters.
Invalid commands will be ignored. The characters sent by the pH
meter are always capital letters.