Hanna Instruments HI 98360 - Manual (Page 24)

24
CHR xx Change the instrument range according with the parameter
value (xx):
• xx=06 EC range
• xx=07 TDS range
• xx=08 NaCl 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:
<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:
• EC and temperature reading on EC range.
• TDS, EC and temperature reading on TDS range.
• NaCl, EC and temperature reading on NaCl range.
The answer string contains:
• Meter mode (2 chars):
• 06 - EC range
• 07 - TDS range
• 08 - NaCl range
• Meter status (2 chars of status byte): represents a 8
bit hexadecimal encoding.
• 0x40 - TDS unit (0-ppm, 0-g/L)
• 0x20 - EC unit (0-
µ
S, 1-mS)
• 0x10 - temperature probe is connected
• 0x01 - new GLP data available
• 0x02 - new SETUP parameter
• 0x08 - AUTOHOLD is stable