Hanna Instruments HI 98170 - Manual (Page 33)

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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: 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 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.