Hanna-instruments HI 2300 Uživatelský manuál stáhnout pdf (Strana 28)

value (xx):

• xx=06 EC range

• xx=07 TDS range

• xx=08 NaCl range

The instrument sends the “ACK” (6) character every time a command is

recognized and a “NAK” (21) character for invalid commands.

COMMANDS REQUIRING AN ANSWER

RAS Causes the instrument to send a complete set of readings in

according with the current range:

• Conductivity and temperature reading on EC range.

• TDS and temperature reading on TDS range.

• NaCl and temperature reading on NaCl range.

The answer string contains:

• Meter mode (2 chars):

• 06 - EC range

• 07 - TDS range

• 08 - NaCl range

• Meter status (2 chars of status byte): represents a 8

bit hexadecimal encoding.

• 0x40 - TDS unit (0=ppm, 1=g/L)

• 0x20 - EC unit (0=µS, 1=mS)

• 0x10 - temperature probe is connected

• 0x01 - new GLP data available

• 0x02 - new SETUP parameter

• Reading status (1 char): R - in range, O - over

range, U - under range.

• The reading (corresponding to the selected range) -

7 ASCII chars, including sign and decimal point.

• Temperature reading - 7 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.

• 0x04 - EC calibration available

• 0x08 - NaCl calibration available

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Hanna-instruments HI 2300 Uživatelský manuál Strana 28