Hanna Instruments HI 2400 - Manual (Page 25)

25
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:
>
where: is 02 ASCII code character (start of text)
is 03 ASCII code character (end of text)
:
is 06 ASCII code character (recognized command)
is 21 ASCII code character (unrecognized command)
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.