Metrohm 827 pH lab User Manual download pdf (Page 25)

4 Short operating tutorial

826/827 pH meter, Instructions for Use 17

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

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Metrohm 827 pH lab User Manual Page 25