15
4.
Press
“Mode”
key to exit “Delete” mode.
H. pH Buffers
The temperature coefficient of pH calibration buffers 1.68, 4.00,
4.01, 6.86, 7.00, 9.18 , 10.01 and 12.46 pH are stored inside
the instrument. The buffers used to calibrate the instrument
must exhibit the same temperature characteristics as the
stored values.
Temperature coefficient of the pH buffers
°C
1.68 4.00 6.86 9.18 4.01 7.00 10.01 12.46
0
1.67
4.01
6.98
9.46
4.01
7.11
10.32 13.42
5
1.67
4.00
6.95
9.39
4.01
7.08
10.25 13.21
10
1.67
4.00
6.92
9.33
4.00
7.06
10.18 13.01
15
1.67
4.00
6.90
9.28
4.00
7.03
10.12 12.80
20
1.68
4.00
6.88
9.23
4.00
7.01
10.06 12.64
25
1.68 4.00 6.86 9.18 4.01 7.00 10.01 12.46
30
1.68
4.01
6.85
9.14
4.01
6.98
9.97
12.30
35
1.69
4.02
6.84
9.10
4.02
6.98
9.93
12.13
40
1.69
4.03
6.84
9.07
4.03
6.97
9.89
11.99
45
1.70
4.04
6.83
9.04
4.04
6.97
9.86
11.84
50
1.71
4.06
6.83
9.02
4.06
6.97
9.83
11.71
55
1.72
4.07
6.83
8.99
4.08
6.97
9.80
11.57
60
1.72
4.09
6.84
8.97
4.10
6.98
9.78
11.45
[Note:
The actual reading of the instrument can differ from the
values shown by
±
0.01 pH
]
