Trotec BF05 Notice D'emploi page 16

5 . . Briefly.press.the.button. 2 ;.the.maximum.value.is.dis-
. played . . Briefly. press. the. button. again. to. return. to. the. .
. normal.measuring.mode .
6 . . Press.and.hold.the.button. 2 .for.approx . . 2.seconds.to.
. switch.between.LUX.and.fc .
7 . . Exceeding. the. measuring. range:. If. the. letters. "OL". or. .
. "VO".appear.on.the.display,.the.input.signal.is.too.strong. .
. (>40.KLux) .
8 . . Take.the.photodetector.away.from.the.light.source.after. .
. completion.of.the.measurement .
B - 5
Spectral sensitivity characteristics:
The.following.diagram.shows.that.the.photodiode.with.fil-
ters.fulfils.the.requirements.of.the.CIE.(International.Com-
mission.on.Illumination),.with.regard.to.spectral.sensitivity.
and.the.photopia.curve.V.(λ) .
The. spectral. sensitivity. function. indicates. how. large. the.
number. of. irradiated. photons. must. be. (per. cm². and. se-
cond).at.each.wavelength,.so.that.the.light.is.just.detected . .
The.electric.current.is.set.in.relation.to.the.irradiated.light.
power . . A.value.of.0 .8.or.80%.means.that.20%.of.the.in-
cident.photons.are.lost,.i .e . . make.no.contribution . . Losses.
result,.for.example,.from.reflection.and.absorption .
OPERATING INSTRUCTIONS - LIGHT INTENSITY METER BF05
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