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• Reading status (2 chars): R ‑ in range, O ‑ over
range, U ‑ under range. First character corresponds
to the appropriate range reading. Second character
corresponds to mV reading (if exist).
• Primary reading (corresponding to the selected
range) ‑ 7 ASCII chars, including sign and decimal
point.
• Secondary reading (only when primary reading is
not mV, EC, NaCl, TDS) ‑ 7 ASCII chars, including
sign and decimal point.
• Temperature reading ‑ 8 ASCII chars, with sign and
two decimal points, always in ºC.
MDR Requests the instrument model name and firmware code.
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 ‑ EC calibration available
• 0x08 ‑ NaCl calibration available
• pH calibration data (if available), which contains:
• the number of calibrated buffers (1 char)
• 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
(7 chars).
• the calibration time, yymmddhhmmss
(12 chars).
• Rel mV calibration data (if available), which contains:
• the calibration offset, with sign (7 chars)
• the calibration time, yymmddhhmmss
(12 chars).
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