Hanna-instruments HI 2550 Manual do Utilizador descarregar pdf (Página 47)

• 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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Hanna-instruments HI 2550 Manual do Utilizador Página 47