Dialux Evo simulation
Front view
Calibration lamp DT300
Back view

All Viso systems are delivered pre-calibrated but it is possible to make a custom calibration of the spectrophotometer if desired. Viso recommends calibration every year (minimum every two years). Having your own calibration light source is even more interesting if your Viso system is to be certified by an official agency, which will perform its own calibration and afterwards issue certification documents. 

All CALI-DT300 contain two calibration light sources – a deuterium lamp for UV calibration, and a tungsten lamp for visible light calibration (both traceable to NIST calibration light sources).

Calibration result Tungsten
Calibration result – Tungsten light source spectrum
Calibration result Deuterium
Calibration result – Deuterium light source spectrum

The CALI-DT300 includes soft start electronics that expand the life time of the light source. Further, the unit contains a dedicated and precise power supply to the light sources to assertain optimal calibration conditions.

When is it time to calibrate?

Noisy spectrum - use Reference lamp

Often, a ‘noisy’ spectrum indicates the need for calibration. You have the option of shipping your sensor to Viso Systems for calibration (expect 1-2 weeks down-time) or making your own calibrations.

With your own reference lamp you will be able to make your own regular calibrations. Viso Systems generally recommends that units are recalibrated every year or as a minimum every other year.

The CALI -DT300 reference light source part of a standard BaseSpion/LabSpion UV-VIS product delivery.


Make your own calibrations in UV and visible light (200-850 nm)

Calibrate as often as you like at no cost

CALI-DT300 is specialized to work with Viso hardware and software

Re-calibrate in 10 easy steps

No down-time i your laboratory


Get more information


Lamp types 
50 W Tungsten Halogen 
+ 30 W Deuterium

Lamp file
The lamp file specifies the CALI-DT300 in uW/cm2/nm at 0.5 m for each wavelength

Small housing including
all connectors, cords etc.

Viso 10-step calibration procedure

Other Viso Accesories

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The extender of the LightSpion allows you to measure lamps that are up to 22 cm in diameter by extending the sensor distance

Upgrade your existing sensor to provide a broader measurement range (eg. UV-VIS) or higher accuracy