9
pH CALIBRATION WITH AUTOMATIC
TEMPERATURE COMPENSATION (HI 8614 family)
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 bea-
kers.
For accurate calibration use two beakers for each buffer solution, the
first one for rinsing the electrode, the second one for calibration. In
this way contamination of the buffers 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 alkaline
measurements.
Note:
With
HI 8614L
the instruments display can be used during
calibration without the need to connect the ammeter and the
reading is directly expressed in pH units.