Hanna Instruments HI 84430 User Manual
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-Reading status (1 char): R-in range, O - over range, U - under range.
-pH reading with sign and decimal point (7 chars)
-Temperature, with sign and 2 decimals point, always in °C (7 chars).
-Checksum (2 chars)
Note: If the meter is in titrator mode only, the meter status and the
checksum will be sent.
MDR
Requests the instrument model name and firmware code (20 chars).
GLP
Requests te calibration data record.
The answer string contains:
-GLP status (1 char): represents a 4 bit hexadecimal enconding.
-0x1-pH calibration available
-0x2- pump calibration available
-pump calibration data (if available):
-calibration time, yymmddhhmmss (12 chars)
-pH calibration data (if available):
-the number of calibrated buffers (1 char)
-reserved (2 chars)
-the offset, with sign and decimal point (7 chars)
-the average of slopes, with sign and decimal point (7chars)
-the calibration time: yymmddhhmmss (12 chars)
-buffer information (for each buffer)
-type (1 char):
O-standard
-status (1 char): N (new)-calibrated in last calibration
O (old)-from an old calibration
-warning during calibration (2 chars):
00- no warning,
04- Clean Electrode warning
-buffer value, with sign and decimal point (7 chars)
-calibration time, yyymmddhhmmss (12 chars)
-electrode condition, with sign (3 chars). The “01” code means
not calculated.
-Checksum (2 chars)
PC INTERFACE
Data transmission from the instrument to the PC can be done with the HI 92000 Windows
compatible software (optional). HI 92000 also offers graphing and on-line help features.
Data can be exported to the most popular spreadsheet programs for further analysis.
To connect your instrument to a PC use a standard USB connector. Make sure that your instrument
is switched off and plug one connector to the instrument’s USB socket and the other to the USB
port of your PC.
If you are not using Hanna Instruments HI 92000 software, please see the following instructions.
SENDING COMMANDS FROM PC
It is also possible to remotely control the instrument with any terminal program. Start the terminal
program and set the communication options as follows: 8, N, 1, no flow control.
COMMAND TYPES
To send a command to the instrument follow the next scheme:
where
Note: Either small or capital letters can be used.
Upon reception of a command the instrument will answer with:
where the checksum is the bytes sum of the answer string, sent as 2 ASCII characters. All the
answer messages are with ASCII characters.
COMMANDS
RAS
Causes the instrument to send a complete set of readings in according with the
current meter mode.
The answer string contains:
-Meter mode (2 chars): -00 pH meter (0.1 resolution)
-01 pH meter (0.01 resolution)
-02 titrator
-Meter status (2 chars) represents a 8 bit hexadecimal encoding.
-0x10: temperature probe connection
-0x01: new GLP data available
-0x02: new setup parameter