Hanna Instruments HI 8427 - Manual (Page 6)

11 10
pH VALUES AT VARIOUS
TEMPERATURE
Temperature has an effect on pH. The cali-
bration buffer solutions are effected by tem-
perature changes to a lesser degree than
normal solutions (see table below).
This pH simulation will not be affected by
this chemical behavior.
Note: With HI 8427 your pH meter will al-
ways show the pH buffer solution at
the standard temperature of 25ºC.
TEMP pH VALUES
°C °F 4.01 6.86 7.01 9.18 10.01
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
32
41
50
59
68
77
86
95
104
113
122
131
140
149
158
4.01
4.00
4.00
4.00
4.00
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.09
4.11
4.12
6.98
6.95
6.92
6.90
6.88
6.86
6.85
6.84
6.84
6.83
6.83
6.84
6.84
6.85
6.85
7.13
7.10
7.07
7.04
7.03
7.01
7.00
6.99
6.98
6.98
6.98
6.98
6.98
6.99
6.99
9.46
9.39
9.33
9.27
9.22
9.18
9.14
9.10
9.07
9.04
9.01
8.99
8.97
8.95
8.93
10.32
10.24
10.18
10.12
10.06
10.01
9.96
9.92
9.88
9.85
9.82
9.79
9.77
9.76
9.75
HI 8427 only:
• Connect the simulator to
the cable (e.g.HI 7855).
• Press the HIGH IMPED-
ANCE key and observe
the LEAKAGE LED while
you are turning the simu-
lator rotary knob to any
pH/mV value.
• If the LED does not light,
the cable and connector
going to the meter are in
perfect condition.
• If the LED is lit, it means
there is a leakage prob-
lem with the cable and
connector and you should
check/replace it.
CABLE HIGH IMPEDANCE TEST
LEAKAGE
LEAKAGE
HIGH
IMPEDANCE