Hanna-instruments HI 98170 Manual de usuario descargar pdf (Pagina 33)

CHR xx Change the instrument range according with the parameter

value (xx):

• xx=01 pH range/0.01 resolution

• xx=02 pH range/0.1 resolution (HI 98170, HI 98171)

• xx=03 mV range

• xx=04 Relative mV range

• xx=05 ISE range (HI 98172)

The instrument will answer for these commands with:

where: <STX> is 02 ASCII code character (start of text)

<ETX> is 03 ASCII code character (end of text)

<answer>:

<ACK> is 06 ASCII code character (recognized command)

<NAK> is 21 ASCII code character (unrecognized command)

<CAN> is 24 ASCII code character (corrupted command)

COMMANDS REQUIRING AN ANSWER

The instrument will answer for these commands with:

where the checksum is the bytes sum of the answer string sent as 2 ASCII characters.

All the answer messages are with ASCII characters.

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

according with the current range:

• pH and temperature reading (HI 98170), and mV

reading (HI 98171) on pH range.

• Rel mV, absolute mV and temperature reading on Rel

mV range (HI 98171, HI 98172).

• ppm, mV and temperature reading on ppm range

(HI 98172).

The answer string contains:

• Meter mode (2 chars):

• 01 - pH range (0.01 resolution)

• 02 - pH range (0.1 resolution)

• 03 - mV range

• 04 - Rel mV range

• 05 - ISE range

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

hexadecimal encoding.

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 51 52

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Hanna-instruments HI 98170 Manual de usuario Pagina 33