User Manual

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

• xx=20 EC range on channel 2

• xx=21 Resistivity range on channel 2

• xx=22 TDS range on channel 2

• xx=23 Salinity range on channel 2

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 com-

mand)

<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, mV reading and temperature on pH range.

• mV and temperature reading on mV range

• Rel mV, absolute mV and temperature reading on

Rel mV range.

• concentration, mV and temperature reading on ppm

range.

• EC and temperature reading on the EC range