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PC INTERFACE
• Meter status (2 chars of status byte): represents a 8 bit hexadecimal encoding.
• 0x10 ‑ temperature probe is connected
• 0x01 ‑ new GLP data available
• 0x02 ‑ new SETUP parameter
• 0x04 ‑ out of calibration range
• 0x08 ‑ the meter is in autoend point mode
• Reading status (2 chars): R ‑ in range, O ‑ over range, U ‑ under range. First
character corresponds to the primary reading. Second character corresponds to
mV reading.
• Primary reading (corresponding to the selected range) ‑ 11 ASCII chars, includ‑
ing sign and decimal point and exponent.
• Secondary reading (only when primary reading is not mV) ‑ 7 ASCII chars,
including sign and decimal point.
• Temperature reading ‑ 7 ASCII chars, with sign and two decimal points, always
in °C.
MDR Requests the instrument model name and firmware code (16 ASCII chars).
GLP Requests the calibration data record.
The answer string contains:
• GLP status (1 char): represents a 4 bit hexadecimal encoding.
• 0x01 ‑ pH calibration available
• 0x02 ‑ Rel mV calibration available
• 0x04 ‑ ISE calibration available
• pH calibration data (if available), which contains:
• the number of calibrated buffers (1 char)
• the ion charge, with sign (2 chars)
• the offset, with sign and decimal point (7 chars)
• the average of slopes, with sign and decimal point (7 chars)
• the calibration time, yymmddhhmmss (12 chars)
• buffers information (for each buffer)
• type (1 char): 0 ‑ standard, 1 ‑ custom
• status (1 char): N (new) ‑ calibrated in last calibration; O (old) ‑ from
an old calibration.
• warnings during calibration (2 chars): 00 ‑ no warning, 04 ‑ Clean
Electrode warning.
• buffer value, with sign and decimal point and exponent (11 chars).
• calibration time, yymmddhhmmss (12 chars).
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