User Guide

30
Commands not requiring an answer from
the pH meter:
PHR sets the range to pH
MVR sets the range to mV (for HI 96250 only)
Commands requiring an answer:
PH? Causes the meter to send the pH value
(6 characters). If the reading is out of
range "Err 1" is sent.
E.g. "14.00" + cr for pH 14.00
MV? Causes the meter to send the mV value
(5 or 6 characters). If the reading is out
of range "Err 2" is sent.
E.g. "-399.9" + cr for -399.9 mV
"-1999" + cr for -1999 mV
(for HI 96250 only)
TM? Causes the meter to send the tempera-
ture value (6 characters).
E.g. "100.0" + cr for 100.0°C
CS? Requests the meter to send the pH cali-
bration status (39 characters). The order
of data is as follows:
xx minutes (2 characters)
xx hour (2 characters)
xx day (2 characters)
xx month (2 characters)
xx year (2 characters)
xxxxx offset buffer (5 characters)
xxxxx offset factor (5 characters)
xxxxx slope 1 buffer (5 characters)
xxxx slope 1 factor (4 characters)
xxxxx slope 2 buffer (5 characters)
xxxx slope 2 factor (4 characters)
x cr (1 characters)
E.g. "01", "02," "03", "04", "96, "07.01",
"00.00", "04.01", "0100", "10.01", "0100",
+ cr
for 02:01 h on 3-apr. 96