Hanna Instruments HI 120 - Manual (Page 43)

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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=03 mV range
• xx=04 Relative mV range
The meter 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
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.
Note: The temperature is sent with two decimals and in Celsius degrees,
even if the set temperature unit was Fahrenheit degrees.
DA? Requests the date.
TI? Requests the time.
MDR Requests the instrument model name and firmware code.
GLP Requests the calibration data record.
PAR Requests the setup parameters setting.
NSL Requests the number of logged samples.
?ML Requests the information about AutoLOG.
/MLPxxx Selects the lot.
?DM Downloads the selected AutoLOG.
LODPxxx Requests the xxx th record logged data.
LODPALL Requests all Log on demand.
Notes: • “Err8” is sent if the instrument is not in measurement mode.
• “Err7” is sent if a different range is requested during AutoLOGGING
mode (for CHR xx command only).
• “Err6” is sent if the requested range is not available.
• “Err4” is sent if the requested set parameter is not available.
• “Err3” is sent if the Log on demand is empty.
• Invalid commands will be ignored.