40
B
9
.
3
3
PROGRAM 2
A enter 1st buf-
fer
B enter 2nd buf-
fer
1st buffer
6.92
2nd buffer
9.33
Check the appropriate value for the buffer at the measured buffer
temperature (see page 26).
After about 30 seconds enter the 2nd buffer value at the working
temperature and then press "B". E.g. 9.33 (at 10°C).
Press the 0 key followed by the PGM key.
The calibration is now complete.
PROGRAM #3 (HI9318)
This program prints the date, time, the offset and slope characteristics
of the pH electrode.
Note:
the offset and the slope characteristics of the electrode are
referred to the last performed pH calibration.
No programming is required.
Simply press the 3 key and the PGM
key.
Changes in an electrode's performance
can be determined from this information.
If the electrode's offset is within 0.50 pH and 1.00 pH or -0.50 pH
and -1.00 pH, it indicates contamination. If the value exceeds ±1
pH the electrode should be
replaced.
The slope characteristic is in
percentage of the theoreti-
cal value of 58.16 mV per
pH unit at 20°C.
3
PGM
PROGRAM 3
DATE
2/04
TIME
14:04
OFFSET
0.16
SLOPE
95.3%