Hanna-instruments HI 2550 Bedienungsanleitung PDF herunterladen (Seite 46)

CHRxx Change the instrument range according with the parameter

value (xx):

• xx=00 pH range/0.001 resolution

• xx=01 pH range/0.01 resolution

• xx=02 pH range/0.1 resolution

• xx=03 mV range

• xx=04 Relative mV range

• 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 ANSWERCOMMANDS REQUIRING AN ANSWER

COMMANDS REQUIRING AN ANSWER

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

according with the current range:

• pH, mV and temperature reading on pH range.

• mV and temperature reading on mV range.

• Rel mV, absolute mV and temperature reading on

Rel mV 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):

• 00 - pH range (0.001 resolution)

• 01 - pH range (0.01 resolution)

• 02 - pH range (0.1 resolution)

• 03 - mV range

• 04 - Rel mV range

• 06 - EC range

• 07 - TDS range

• 08 - NaCl range

• 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

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Hanna-instruments HI 2550 Bedienungsanleitung Seite 46