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68
LP
471
PHOT,
RAD,
UVA,
UVB,
UVC,
PAR
AND
LUM2
P
HOTOMETRIC AND
R
ADIOMETRIC
P
ROBES EQUIPPED WITH
SICRAM
M
ODULE
Probes of LP471… series are photometric and radiometric probes measuring
illuminance
(LP471
PHOT),
irradiance
(LP471 RAD, LP471 UVA, LP471 UVB and LP471 UVC),
PAR
(LP471
PAR) and
luminance
(LP471 LUM 2). All of them, but LUM 2, are provided with a diffuser for
cosine correction.
Upon power on, the instrument automatically detects the probes connected to its inputs: you just
have to connect the probe module and, if the instrument is already on, switch it off and on again to
allow the instrument to identify the module. The unit of measurement is defined by the instrument
according to the module connected to its inputs: when a probe can provide different units of meas-
urements, press the <9/UNIT> key to select the one you need.
All probes are factory calibrated and do not need any additional calibration by the user.
In addition to instant measurement, our multifunction instrument can also calculate the integral over
the time of acquired measurements and can contemporaneously show, on the display three lines, in-
stant measurements, integrated measurements and time in seconds. A number of limits settable from
menu can be combined either with an integrated measurement or with the integration time and,
when exceeded, the instrument stops the integral calculation.
Measurements provided by the probes are:
•
Instant measurement (variable identified by number 1, that is A1, B1 or C1),
•
Integration time in seconds (variable identified by number 2, that is A2, B2 or C2),
•
Q Integral (variable identified by number 3, that is A3, B3 or C3).
If two probes of the same type are connected to the instrument, among the variables selectable by
means of Xsel, Ysel and Zsel keys, the difference between instant values (A1, B1 e C1) will also be
available.
Note:
for LP471 LUM 2 luminance probe, the calculation of integral is not provided.
The following table lists the available units of measurements, according to the type of probe con-
nected to the instrument.
Type of Measurement
Unit of Measur. Q Integral Unit of Measurement
Illuminance (Phot)
lux
fcd
lux
⋅
s
fcd
⋅
s
Irradiance (RAD - UVA - UVB - UVC)
W/m
2
μ
W/cm
2
W
⋅
s/m
2
μ
W
⋅
s/cm
2
PAR
μ
mol/(m
2
⋅
s)
μ
mol/m
2
Luminance (LUM 2)
cd/m
2
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