Metrohm 894 Professional CVS - Manual (Page 11)

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1 Introduction
894 Professional CVS
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1 Introduction
1.1 Instrument description
The 894 Professional CVS is a PC-controlled voltammetric measuring
instrument. Together with the viva PC software, it represents a measuring
system specifically designed for the determination of additives in electro-
plating baths. In the electroplating industry, the determination of additives
is an indispensable step in the production process and plays a significant
role in quality assurance. The additives can be quantitatively determined
by means of CVS (Cyclic Voltammetric Stripping).
The 894 Professional CVS is very compact in size and requires little space
for operation. The measuring head can be removed from the instrument
and put back in place again with a simple hand movement. This allows
you to exchange the measuring head with all the electrodes and tubing
quickly. The measuring head arm can be tilted upwards, thus enabling a
comfortable placement of the measuring vessel in the holder. A rotating
disk electrode (RDE) serves as a working electrode.
The measuring instrument uses the potentiostatic three-electrode princi-
ple. This principle means that the potential at the working electrode is
gauged to the predefined setpoint value with the aid of a reference elec-
trode to which no current is applied. The current flows through a separate
auxiliary electrode.
The 894 Professional CVS can be used both for single determinations and
sample series. Various sample processors are suitable for this measuring
instrument. Furthermore, you can automate the addition of reagents and
auxiliary solutions by using dosing devices of the type 800 Dosino.
The 894 Professional CVS must be started, operated and controlled via the
viva PC software. The data transfer between the measuring instrument
and the PC takes place via a USB connection. At the end of every determi-
nation, the data (voltammogram, results, etc.) is saved in a database.
The present manual describes the hardware of the 894 Professional CVS
(installation, start-up, etc.). Operation by means of the viva PC software is
described in the software documentation (online help and Tutorial CVS).