Metrohm 827 pH lab - Manual (Page 25)

4 Short operating tutorial
826/827 pH meter, Instructions for Use
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4 Short operating tutorial
In this section the necessary steps for carrying out a simple pH and ion
measurement with calibration are described. The instructions are li-
mited to those steps that are absolutely necessary and will enable you
to carry out your first measurements with the pH meter directly. The op-
erating principles are described in Section 3.3.
4.1 Requirements
The following instruments, accessories and solutions are required for
carrying out the pH calibration and measurement described below:
• 826 pH mobile (2.826.0XX0) or 827 pH lab (2.827.011X,
2.827.021X)
• pH electrode
• Calibration buffers
Metrohm buffer solutions pH 4.00 and pH 7.00
The calibration parameters for the pH mode are set for a calibration us-
ing two Metrohm buffers as default (see Section 6.1.2). If you want to
use other buffers then the corresponding buffer type must be entered.
4.2 pH calibration
1 Start calibration with first buffer
• Start calibration with <CAL>
• Immerse pH electrode in buffer solution pH 7 and confirm with
<OK>
• If a temperature sensor is connected, the calibration tempera-
ture is being determined
• If no temperature sensor is connected:
enter the temperature with the arrow keys and confirm with
<OK>
• The first buffer is being measured
• The following message is displayed after successful mea-
surement:
change buffer <OK>
2 Continue calibration with second buffer
• Remove pH electrode from first buffer and rinse with water
• Immerse pH electrode in second buffer solution pH 4 and
continue calibration sequence with <OK>
• The second buffer is being measured