User Guide

7
pH CALIBRATION WITH AUTOMATIC
TEMPERATURE COMPENSATION
(HI 8614 & HI 8614L)
Initial preparation:
• Connect the pH electrode
to the BNC socket.
• Connect the temperature
probe to the transmitter.
Pour small quantities of pH 7.01 and pH 4.01
solution into two clean beakers.
For accurate calibration use two beakers for
each buffer solution, the first one for rinsing
the electrode, the second one for calibra-
tion. In this way contamination of the buff-
ers is minimized.
To get accurate readings, use pH 7.01 and
pH 4.01 if you are going to measure acid
samples or pH 7.01 and pH 10.01 for alka-
line measurements.
Note: with HI8614L the instru-
ments display can be
used during calibration
without the need to con-
nect the ammeter and the
reading is directly ex-
pressed in pH units.
INPUT
-VE LO
O
P
+VE LO
O
P
TEM
P
. PR
O
B
E
HI 7004 HI 7007
HI 7004
HI 7007
CALIBRATION
HI 7007
RINSE
SLOPE ADJUSTMENT
OFFSET ADJUSTMENT