9
7.9
Value will vary according to solution’s temperature listed below:
ISO standard buffer solution
Temperature
(°C)
Slope
1.68
Offset
7.00
Slope
4.01
Slope
10.01
Slope
12.45
0
1.67
7.11
4.00
10.32
13.43
5
1.67
7.08
4.00
10.25
13.21
10
1.67
7.06
4.00
10.18
13.00
15
1.67
7.03
4.00
10.12
12.81
20
1.68
7.01
4.00
10.06
12.63
25
1.68
7.00
4.01
10.01
12.45
30
1.69
6.98
4.02
9.97
12.29
35
1.69
6.98
4.02
9.93
12.13
40
1.70
6.97
4.03
9.89
11.99
45
1.70
6.97
4.04
9.86
11.84
50
1.71
6.97
4.05
9.83
11.70
55
1.72
6.97
4.06
11.57
60
1.72
6.97
4.08
11.45
65
1.73
6.97
4.10
70
1.74
6.98
4.12
75
1.75
6.99
4.14
80
1.77
7.00
4.16
85
1.78
7.02
4.18
90
1.80
7.03
4.21
95
1.81
7.05
4.24
7.10
If the meter does not recognize the buffer, it means the electrode
could be defective or the buffer solution is wrong. Calibration
cannot proceed until they are rectified.
7.11
When the meter beeps, Offset point is established.
7.12
Now 1.68, 4.01, 10.01 and 12.45 will alternate on main display.
7.13
Rinse the pH electrodes and temperature probe in distilled water,
blot or shake dry then dip into next slope buffer solution.
7.14
When the meter recognizes the buffer, it displays in blinking mode.
7.15
If the value is different from that of the buffer solution then the
electrode could be damage.
7.16
When the meter starts beeping, a Slope point is established. The
remaining slope values will alternate on the main display.
7.17
Repeat step 7.13 to 7.16 sequentially up to 4 slope points.
7.18
At least 2 calibration points (offset & slope) must be established in each session
of calibration. Otherwise, the whole calibration will not register.
7.19
When calibration is completed, press
ENTER
to store all calibrated
points and to return to normal measuring mode.
7.20
Anytime during calibration, press
EXIT
for 2 seconds will abort all.
