30
e.g. 6.95 at 5°C:
• press 6
• press decimal point
• press 9
• press 5
• press ENTER A
Value 6.95 appears on the left display with pH symbol blinking. If
there is a difference of 1 pH between the two displays, there will be a
long beep.
Otherwise,
• press the CON key.
The left display value is transferred to the right display and the left
display shows "P1-2".
Rinse the electrode and dip it with the temperature
probe into the second solution
HI7009
or
HI8009
(pH 9.18), the value of which for example is 9.39
at 5°C (read from the standard charts). Wait for 30
seconds.
• press 9
• press decimal point
• press 3
• press 9
• press ENTER B
The value "9.39" appears on the left display with a blinking pH
symbol. If there is a difference of 1 pH between the two displays, there
is a long beep.
Otherwise,
• press the CON key.
ENTER
A
6
.
9
5
pH
pH
CON
pH
4 cm
(1½
")
HI 7009
ENTER
B
9
.
3
9
pH
pH
CON