3 short operating tutorial, 1 ph measurement, 1 requirements – Metrohm 781 pH/Ion Meter User Manual
Page 29: 2 preparations, Short operating tutorial, Ph measurement, Requirements, Preparations, 3short operating tutorial
3 Short operating tutorial
780/781 pH/Ion Meter, Manual
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3
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 lim-
ited to those steps that are absolutely necessary and will enable you to
carry out your first measurements with the pH/Ion Meter directly. The
operating principles are described in Section 4.4.
3.1
pH measurement
3.1.1
Requirements
The following instruments, accessories and solutions are required for
carrying out the pH calibration and measurement described below:
•
780 pH Meter (2.780.0010) or 781 pH/Ion Meter (2.781.0010)
•
801 Magnetic Stirrer (2.801.0010)
Other stirrers can also be used (see Section 5.6).
•
pH electrode (enclosed)
Or another pH electrode with Pt1000 temperature sensor, e.g.:
6.0258.600 Unitrode, LL pH glass, with cable 6.2104.600, 2 mm
temp. plug
6.0257.000 Aquatrode Plus for ion-deficient water, 4 mm temp. plug
6.0228.000 Solitrode, LL pH glass, PP shaft, 4 mm temp. plug
•
Calibration buffers
Metrohm buffer solutions pH 4.00, 7.00 and 9.00 (6.2307.230)
3.1.2
Preparations
Before you start this short tutorial you must ensure that the instrument
and accessories have been correctly installed as described in Sec-
tion 2. The most important points concerning the installation are briefly
given again below (please refer to the Section mentioned for details). If
you are not certain whether all the settings (
CONFIG
and
PARAMETER
pH
) correspond to the original conditions you can first reset any altera-
tions by initializing the memory (
RAM Initialization
) (see Sec-
The calibration parameters for the pH mode are set for a calibration us-
ing two Metrohm buffers as default (see Section 6.2.2). If you want to
use other buffers then the corresponding buffer type must be entered.
1 pH/Ion Meter installation
•
Set up instrument
•
Connect stirrer
•
Connect electrode
•
Mains connection