Manual

CHR xx Change the instrument range according with the parameter

value (xx):

• xx=06 % range

• xx=07 ppm range

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.

The answer string contains:

• Meter mode (2 chars):

• 06 - % range

• 07 - ppm 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

• 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.