7
Room Considerations
Laboratory environment
▪
The LightSpion can be used outside of the laboratory and compensates
automatically for steady ambient light. However, for the most precise
measurements, a dark room/laboratory is recommended. You can find
guidance in
▪
Always keep your laboratory clean from dust and particles. Dust may
interfere with measurement if it accumulates on and around the sensor by
introducing straylight and disturbing translucence. Dust and particles in the
mechanical parts of the goniometer may disturb functionality and may
cause wear on motors, belts and bearings. Disconnect all USB cables and
power supplies, and vacuum clean your goniometer regularly (normally
every month) to remove dust. Mount a brush on the vacuum cleaner
handle. Dry off all external surfaces with a clean, dry, cotton cloth (avoid
statics).
▪
Avoiding air currents is necessary to minimize cooling of devices under
test. Limit air flow (e.g. from air conditioning systems or draught) around
the system (may alter light source intensity).
▪
Limit heat transmission from light source through mounting system. Should
be mounted as realistically as possible
The standard test conditions and
tolerance intervals of CIE DIS 025
(laboratory conditions)
Standard test
condition
Tolerance interval
Ambient temperature
25.0 °C
±1.2 °C
Surface temperature for device
under test
Nominal operating
temperature t
p
±2.5 °C
Air movement
Stationary air
0 m/s to 0.25 m/s
Making measurements
Bulbs and Spots
Before making any measurements, it is
important to align the investigated light
source. Use the alignment tool located in the
front compartment of the LightSpion case
and place it in front of the light source.
Then adjust the height by sliding the lamp
holder bracket up and down.
