Hanna-instruments HI 3220 Manual do Utilizador descarregar pdf (Página 50)

CHRxx Change the instrument range according with the parameter

value (xx):

• xx=10 pH range/0.001 resolution on channel 1

• xx=11 pH range/0.01 resolution on channel 1

• xx=12 pH range/0.1 resolution on channel 1

• xx=13 mV range on channel 1

• xx=14 Relative mV range on channel 1

• xx=15 ISE range on channel 1 (HI 3221)

• xx=20 ISE range on channel 2 (HI 3222)

• xx=21 mV range on channel 2 (HI 3222)

• xx=22 Relative mV range on channel 2 (HI 3222)

The instrument will answer for these commands with:

<STX> <answer

<ETX>

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, temperature and mV reading on pH range.

• Rel mV, absolute mV and temperature reading on Rel

mV range.

• concentration, mV and temperature reading on ppm

range (HI 3221, HI 3222).

The answer string contains:

• Meter mode (2 chars):

• 10 pH range/0.001 resolution on channel 1

• 11 pH range/0.01 resolution on channel 1

• 12 pH range/0.1 resolution on channel 1

1 2 ... 45 46 47 48 49 50 51 52 53 54 55 ... 67 68

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Hanna-instruments HI 3220 Manual do Utilizador Página 50