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PC INTERFACE
OFF Is equivalent to pressing OFF key
CHR xx Change the instrument range according with the parameter value (xx):
• xx=00 pH range/0.001 resolution
• xx=01 pH range/0.01 resolution
• xx=02 pH range/0.1 resolution
• xx=03 mV range
• xx=04 Relative mV range
• xx=05 ISE range (HI98191)
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:
<STX> <answer> <checksum> <ETX>
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 (HI98191).
The answer string contains:
• Meter mode (2 chars):
• 00 ‑ pH range (0.001 resolution)
• 01 ‑ pH range (0.01 resolution)
• 02 ‑ pH range (0.1 resolution)
• 03 ‑ mV range
• 04 ‑ Rel mV range
• 05 ‑ ISE range
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