Hanna Instruments HI 9017 - Manual (Page 47)

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This line makes the computer send a Data Link Escape character (the
command expressed as a number or a 3-character sequence) and a CR
character.
Note: Windows Terminal
® and all the other terminal programs that
support the ANSI escape sequence, represent the DLE character
by the string ‘^P’ and the CR character by the string ‘^M’.
E.g. the line ‘^PPHR^M’ sets the range to pH.
TYPE OF COMMANDS
Commands not requiring an answer from the pH meter.
PHR sets the range to pH
MVR sets the range to mV
Commands requiring an answer:
PH? Causes the pH meter to send the pH value through the serial
interface. If the reading is out of range ("Err1"), "Err1" is sent
instead of the pH value.
If the range is set to mV (no pH reading available), "Err6" is
sent (for HI9218 and HI9219 only).
MV? Causes the pH meter to send the mV value through the serial
interface. If the reading is out of range ("Err2"), "Err2" is sent;
if the range is set to pH, "Err6" is sent.
TM? Causes the pH meter to send the temperature value. If this is
out of range, an "Err3" signal is sent instead.
For HI9218, HI9219 and HI9318 only:
HM? This orders the pH meter to send the time value (in hours and
minutes), A 5-character string is sent in HH.MM format.
MD? This orders the pH meter to send the data value (in months and
days). A 5 character string is sent in MM.DD format.
These commands may be sent with either capital or small letters. The
characters sent by the meter are always capital letters.
For HI9318 only:
a) Numerical data: a command line containing figures , the minus
sign and the decimal point will be interpreted by the pH meter as
if that number was sent by means of the keyboard. The maximum
number of figures allowed is 4.
b) Commands which do not require a response by the pH meter:
CAL is equivalent to pressing the CAL key
CON is equivalent to pressing the CON key
AKY is equivalent to pressing the A key
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