8
109117-1 Rev. A, 10/96
2.4 mV Measurements
The millivolt capability of pH meters can be used to determine the
actual slope of pH electrodes but is most frequently used for doing
potentiometric readings or titrations with Platinum Oxidation-
Reduction electrodes.
Press until mV shows at the top of the display.
Put the tip of the electrode in the sample and press
The meter will display absolute millivolts.
When the reading is stable, press to freeze the display.
2.5 Temperature Measurements
To measure temperature you must be using an ATC probe or the
3-in-1 Combination electrode which includes an ATC probe. If you
do not have an ATC probe the temperature will default to 25°C.
Press until °C shows at the top of the display.
Put the ATC probe (or 3-in-1 electrode) in the sample and
press The meter will display temperature in °C.
When reading is stable, press to freeze the display.
Buffer Temperature Correction Table
The 430 automatically corrects for temperature using the values
shown in the table.
4.00 4.01 6.86 7.00 9.18 9.21 10.01
0°C 4.00 4.01 6.98 7.12 9.46 9.52 10.32
5°C 4.00 4.01 6.95 7.09 9.40 9.45 10.25
10°C 4.00 4.00 6.92 7.06 9.33 9.38 10.18
15°C 4.00 4.00 6.90 7.04 9.28 9.32 10.12
20°C 4.00 4.00 6.88 7.02 9.23 9.26 10.06
25°C 4.00 4.01 6.86 7.00 9.18 9.21 10.01
30°C 4.01 4.01 6.86 6.99 9.14 9.16 9.97
35°C 4.02 4.02 6.84 6.98 9.10 9.11 9.93
40°C 4.03 4.03 6.81 6.98 9.07 9.06 9.89
45°C 4.04 4.04 6.83 6.97 9.04 9.03 9.86
50°C 4.06 4.06 6.83 6.97 9.01 8.99 9.83
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