Usage of Solarmeter ® Ultraviolet Radiometer
for Lamp Aging Tests
- Wear eye protection when checking UV lamps
(UV-block wrap around glasses)
- Allow lamps to warm-up prior to taking
readings (at least 5 min).
- When checking aging of lamps, keep measuring
distance and locations constant.
- Lamps should be replaced when output drops
to about 70% of their original (new) readings.
Take overall reading at center of tanning
bed bench pointing up with canopy closed,
or check individual lamps at acrylic with
canopy up. Keep track of hours vs. readings
on a chart.
- If unsure of what original new values were,
replace two adjacent lamps with new ones of
the same kind and compare old ones.
- This meter is primarily "seeing"
the UVA "browning" rays. For erythemal
rays use Model 7.0 MED/hr meter to relate
to Te time.
- When checking acrylic transmission, take
reading through acrylic; then remove acrylic
and hold meter sensor at approximately the
same distance from lamp as the acrylic shield
was located. Note: Model 6.0 UVB meter is
better for this purpose).
- When using this meter to compare different
types of lamps, due to their different spectral
power distributions, the readings should be
considered relative rather than absolute.
Although higher output lamps of similar SPD's
will read higher than low output lamps, ones
that peak near 365 nm (as does the meter response)
will read higher than ones peaking near 350
nm even if the total UV output of both is
- Do not subject the meter to extremes in
temperature, humidity, shock or dust.
- Use a dry, soft cloth to clean the intrument.
Keep sensor free of oil, dirt, etc.