User Guide

15
PROCEDURE
• Press the RANGE key to select the pH
measurement mode.
• Rinse the pH electrode with
some pH 7.01 (HI7007/
HI8007) solution or tap wa-
ter. Dip the bottom 4 cm
(1½") of the electrode and
the temperature probe into
a beaker containing pH 7.01
solution.
• Press the CAL key. The secondary (lower)
LCD will blink “7” to indicate that pH 7.01
is expected and the electrode is getting
conditioned.
• When the “7” stops blinking, the calibration
can be confirmed. Press the CFM key to
confirm the first buffer.
• If everything is satisfactory
the secondary LCD will blink
“10” expecting the second
buffer at pH 10.01.
• If the buffer is out of the offset range, "E1"
as error message will appear on the sec-
ondary display. Press the CAL key and
RANGE
pH
4 cm
(1½
")
HI 7007
CAL
CFM