Apogee MU-100 Handbuch - Seite 2

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5) Review Data: Press up/down. To exit and

return to present conditions and the capability

to take measurements, press sample.

6) In LOG mode, every 30 minutes the meter

will average the sixty 30-second measurements

taken and store the average. Ninety-nine

30-minute averaged measurements can be

stored. Every 48 measurements (making a

24-hour period) the meter will also store a

daily total. In addition, 99 daily averages can

be stored and are available for download only.

These measurements are not viewable on the meter LCD. All

measurements taken in LOG mode will continue to be stored

eliminating the oldest measurement.

(SMPL)

99 Sample

Measurements

Viewable on meter LCD & downloadable

Cleaning

Debris on the sensor head is a common cause of low readings.

The sensor has a domed head for improved self-cleaning from

rainfall, but salt deposits can accumulate from evaporation

of sprinkler irrigation water and dust can accumulate during

periods of low rainfall. Salt deposits should be dissolved and

removed with vinegar and a soft cloth or q-tip. Dust and other

organic deposits are best removed with water, rubbing alcohol

or window cleaner. Never use an abrasive cleaner on the lens.

(LOG)

99 Log

99 Daily Averages

Measurements

Downloadable Only

Mounting the Sensor

Nylon Screw:

10-32x3/8

The Clear Sky Calculator was designed to determine the need

for radiation sensor recalibration. It determines the intensity

of radiation falling on a horizontal surface at any time of the

day in any location in the world. It is most accurate when used

near solar noon in the summer months.

The calculator is found at

www.clearskycalculator.com

is used by typing conditions into the Clear Sky model and

comparing measured values with the calculated value for a

clear sky. If the output of the sensor over multiple days at

solar noon is consistently less than the model value (by more

than 8%), the sensor should be cleaned and re-leveled. If

the output is still low after a second test, email

apogeeinstruments.com

to discuss test results and the possible

return of sensors. When used near solar noon over multiple

clear, unpolluted days during the spring and summer months,

it is estimated that the accuracy of the model can be ±4% in

all climates and locations around the world.

Mount the sensor to a solid

surface with the nylon mounting

screw.

The sensor should be mounted

level for the most accurate

measurements. We recommend

using our leveling plate (AL-

100). The sensor should be

mounted with the cable pointing

toward true north in the northern

hemisphere or true south in the

southern hemisphere to minimize

azimuth error. The azimuth error

is typically less than 1%.

and

calibration@