Apogee MU-100 Manual

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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.

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.

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

and

up/down

to make choice. Once desired

calibration is blinking, press

times to begin.

3) Choose Mode: To choose between SMPL

and LOG modes push

mode

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

(RUN should be blinking), then while pressing down, press

mode once.

CAUTION: Resetting will erase ALL measurements.

mode

once

mode

three more

twice and

up/down

mode

twice