PV8344F4E013
47
Appendix
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Principles of measurement
How to calculate spectral reflectance (spectral transmittance) with the product is described
below.
The product measures the strength of spectral reflectance of the reference, whose
reflectance (transmittance) is known (Ireference (
λ
)) and that of the sample to be measured,
whose reflectance is unknown (Isample (
λ
)). Based on the two spectral reflectance values,
use the following formula to calculate the reflectance of the sample under measurement.
Therefore, the measurement value output from the product is not an absolute value but a
relative value against the reference sample.
R
(
O
)
I
sample
(
O
)
I
background
(
O
)
I
reference
(
O
)
I
background
(
O
)
R
theory
(
O
)
)
(
O
R
: Measured value of the spectral reflectance of the sample
)
(
O
sample
I
: Strength of spectral reflectance of the measured sample
I
reference
(
O
)
: Strength of spectral reflectance of the reference
)
(
O
background
I
: Strength of background
)
(
O
theory
R
: Theoretical value of the spectral reflectance of the reference
The reference samples provided as an accessory with the product are composed of
S-BSL7 glass made by OHARA, GmbH.
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Precautions for safe use of the lighting device (lamp house)
Though heavily dependent on the usage conditions (ambient temperature and humidity,
supply voltage, period of lighting, etc.), the useful life of the lighting device (lamp house) *
assumes either short one of for approximately eight years
䠄
In the case of the use of
approximately eight hours a day
䠅
or approximately 20,000 hours .
*The above statement does not guarantee freedom from failures or repair at no
㻌
charge
during the service life.
*Depending on the usage conditions, there is a possibility of aging degradation in a shorter
period.
Inspect the lamp house according to
Appendix: Checklist for inspection of the lighting
device (lamp house)
until the lamp house reaches the end of its useful life. Should any
unexpected incident occur (e.g., smoke) during use, turn off the power immediately and
contact the sales representative where you purchased the unit or our sales department.
Regular inspection is recommended, in order to achieve safe use and reduce downtime.
