39
4 cm
(1½
")
HI 7009
PROGRAM #2 (HI9318)
This program lets you calibrate with buffer values other than 4, 7 and
10 pH which are pre-programmed into memory.
To enter program 2, press the 2 key
and then the PGM key.
A is the first buffer value and
B is the second buffer value.
The buffers can be anywhere between 0 and 14 pH.
Example:
To calibrate with NBS buffers 6.86 pH and 9.18 pH at a temperature
of 10°C.
The corresponding pH values at this temperature are 6.92 and 9.33
respectively.
Immerse the pH electrode and the temperature probe
into the 1st buffer (e.g. pH 6.86).
Check the appropriate value for the buffer at the
measured buffer temperature (see page 26).
After about 30 seconds enter the 1st buffer value at the working
temperature followed by "A". E.g. 6.92 (at 10°C).
Rinse the electrode and immerse it in the 2nd buffer
(e.g. pH 9.18).
2
PGM
PROGRAM 2
A enter 1st buf-
fer
B enter 2nd buf-
fer
4 cm
(1½
")
HI 7006
A
6
.
9
2
PROGRAM 2
A enter 1st buf-
fer
B enter 2nd buf-
fer
1st buffer
6.92