Metrohm 894 Professional CVS - Manual (Page 88)

6.7 Calibrator
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894 Professional CVS
6.7 Calibrator
The 894 Professional CVS is equipped with a built-in calibrator with pre-
cisely specified reference values that are defined in the corresponding cali-
bration certificate. This innovative component permits the performance of
voltammetric measurements with increased reliability and precision. The
measuring input of the 894 Professional CVS is automatically adjusted to
the reference values of the calibrator before each measurement and thus
yields stable, precise and reproducible measured values over a long
period, even under suboptimal measuring conditions. In this way, the 894
Professional CVS automatically recalibrates itself before each measure-
ment.
When the 894 Professional CVS is started up, a prompt to activate the cal-
ibrator appears (see "Activating the calibrator", page 54). The automatic
adjustment is active starting with this activation time. The certified refer-
ence values of the built-in calibrator are valid for two years. We guarantee
that the adjustment is undertaken correctly and that the automatic cali-
bration is accurate for this period. A prompt appears in the viva PC soft-
ware stating that the calibrator should be replaced in order to ensure a
correct adjustment of the measuring input just before the end of these
two years.
We therefore recommend having the calibrator replaced every two years.
We can thus guarantee correct automatic self-adjustment of the 894 Pro-
fessional CVS over the entire service life of the instrument. In addition, you
are well prepared for your audits. Please contact your local Metrohm rep-
resentative to replace the calibrator. One of our trained Metrohm service
engineers will then replace the calibrator as part of a preventive mainte-
nance procedure.
6.8 Relocating the 894 Professional CVS
If you wish to relocate the 894 Professional CVS within the laboratory,
proceed as follows:
Make sure that all electrical and tubing connections are disconnected
before carrying the instrument to a new location.