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3 Installation
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13
Calibration with an external wavelength standard
The external calibration is usually carried out by a regional Metrohm ser-
vice representative during the start-up of the instrument.
If necessary, the external standard can also be obtained separately (article
number 6.7494.000). The user can repeat the external calibration if
needed.
Calibrating the instrument with an external wavelength
calibration standard
Accessories
￭
DS2500 liquid wavelength calibration standard (6.7494.000)
1 Using the wavelength calibration standard
￭
Place the wavelength calibration standard in the sample compart-
ment.
￭
Optionally place the cover plate on the sample compartment. If
the sample holder is heated, the cover plate protects the user
from the heat that is generated.
￭
Tighten the screw.
2 Calibrating the instrument
Start the calibration in the control software
(see 8.105.8032 Tutorial
Vision Air Local and 8.105.8036 Tutorial Vision Air Network and
Server)
.
Calibration with an internal wavelength standard
Carry out the internal calibration once a different type of sample vessel to
the one used in the previous measurement is inserted. The path length is
relevant. Carry out an internal calibration after a DS2500 holder for 2 mm
disposable vials was replaced with a DS2500 holder for 8 mm disposable
vials, for example.
Calibrating the instrument with an internal wavelength
standard
Accessories
￭
Sample holder
1 Inserting the sample vessel
￭
Define with which sample vessel the next measurement is to be
carried out.
￭
Insert the selected sample vessel.
