46
CHRxx
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=06
EC range
• xx=07
TDS range
• xx=08
NaCl range
The instrument sends the “ACK” (6) character every time a command is
recognized and a “NAK” (21) character for invalid commands.
COMMANDS REQUIRING AN ANSWER
RAS
Causes the instrument to send a complete set of readings in
according with the current range:
• pH, mV and temperature reading on pH range.
• mV and temperature reading on mV range.
• Rel mV, absolute mV and temperature reading on
Rel mV range.
• Conductivity and temperature reading on EC range.
• TDS and temperature reading on TDS range.
• NaCl and temperature reading on NaCl range.
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
• 06 ‑ EC range
• 07 ‑ TDS range
• 08 ‑ NaCl 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