Trans instruments WalkLAB HP 9010 Operation Manual page 11

Calibration with Nist Standard (if you have NIST buffer solution)
7.21 Make sure the unit is properly installed and electrode connected.
7.22 This meter can automatically recognize the Nist Standard buffer
solution. You will need at least 2 buffer solutions. Always begin
with "Offset" calibration first.
7.23 Rinse the pH electrodes and temperature probe in distilled water
then dip in the buffer solution, first on the Offset buffer (pH6.86)
then subsequently on each slope buffer.
Always rinses the electrode with distilled water before and after each
test. This is to prevent solution carry over or cross contamination.
Standard solutions must maintain highest purity; otherwise the
7.24 Press
CAL
indicating it is in calibration mode.
7.25 Value will vary according to temperature listed below table:
Temperature
(°C)
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
meter's accuracy could be compromised.
key and display will show the 6.86 and
Slope
1.68
1.67
1.67
1.67
1.67
1.68
1.68
1.69
1.69
1.70
1.70
1.71
1.72
1.72
1.73
1.74
1.75
1.77
1.78
1.80
1.81
NIST standard buffer solution
Slope Offset
4.01 6.86
4.01 6.98
4.00 6.95
4.00 6.92
4.00 6.90
4.00 6.88
4.01 6.86
4.01 6.85
4.02 6.84
4.03 6.84
4.04 6.83
4.06 6.83
4.06 6.83
4.08 6.84
4.10 6.84
4.12 6.85
4.14 6.85
4.16 6.86
4.18 6.87
4.21 6.88
4.24 6.89
10
blinking,
CAL
Slope Slope
9.18 12.45
9.47 13.43
9.38 13.21
9.32 13.00
9.27 12.81
9.22 12.63
9.18 12.45
9.14 12.29
9.10 12.13
9.07 11.99
9.04 11.84
9.01 11.70
8.99 11.57
8.96 11.45
8.94
8.92
8.90
8.88
8.87
8.85
8.83