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3
Measuring Radiation
Measurements indicate that less than 0.4% of the photon flux
from sunlight falls below 320 nm; 2.3% falls between 320 and
350 nm, and 6% falls between 350 and 400 nm. Although the
UV radiation between 250 and 320 nm is critically important in
photochemical and photobiological reactions, only about 5% of
the UV photons are in this range. Because only a small fraction
of the photons are in the UV-B range, this meter cannot be
used to selectively measure UV-B radiation. The sensor is
sensitive to UV-B radiation, but it is included with the UV-A
radiation to provide a total measurement of UV radiation.
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Using the Meter
1) Press the power button to start. The
meter will turn itself off 2 minutes after
button is pushed to conserve battery.
2)
Choose Calibration
: To select between
µmol and Watts calibration, push
mode
once
and
up/down
to make choice. Once desired
calibration is blinking, press
mode
three more
times to begin.
3)
Choose Mode
: To choose between SMPL
and LOG modes push
mode
twice and
up/down
to make choice. Once desired mode is blinking,
press
mode
two more times to begin.
For Automatic Measurements:
Use LOG mode. Meter will power
on/off to record a measurement every
thirty seconds.
For Manual Measurements: Use SMPL mode.
Press
sample
to take a measurement. Store up to 99
SMPL measurements.
4)
Reset Meter
: From LOG or SMPL mode, press
mode
twice
(RUN should be blinking), then while pressing
down
, press
mode once.
CAUTION: Resetting will erase ALL measurements.
Ultraviolet Meter
The ultraviolet meter measures and displays instantaneous
readings of the ultraviolet radiation between 250 and 400
nanometers (nm) in micromoles (µmol) per meters per second
or Watts per meters squared.
Ultraviolet Meter
Model MU-100 & 200 Series
