Instructions

HD2402 - 50 - V1.3
8 SENSOR CALIBRATION
Instruments are factory-calibrated and do not require any additional intervention by
users. Each sensor in the HD2402 is individually calibrated in different modes.
Luxmeter (Channel 6), calibration is performed by comparison to the second-line
reference luxmeter used at the Delta OHM metrological laboratory; the comparison is
performed through an incandescent lamp operating at a color temperature of 2856K
(illuminant A).
UV Radiometer (Channel 2), calibration is performed by comparison to the second-
line reference radiometer used at the Delta OHM metrological laboratory; calibration is
performed with a 270nm monochromatic light obtained at the output of a double mo-
nochromator and using a Xe-Hg lamp as a source.
UVA Radiometer (Channel 5), calibration is performed by comparison to the sec-
ond-line reference radiometer used at the Delta OHM metrological laboratory; calibra-
tion is performed with a 365nm monochromatic light obtained by applying a 365nm
interferential filter to a Xe-Hg lamp.
BLU Radiometer (Channel 7), calibration is performed by comparison to the sec-
ond-line reference radiometer used at the Delta OHM metrological laboratory; calibra-
tion is performed with a 440nm monochromatic light obtained by applying a 440nm
interferential filter to a halogen lamp.
IR Radiometer (Channel 3), calibration is performed by comparison to the second-
line reference radiometer used at the Delta OHM metrological laboratory; calibration is
performed with a 680nm monochromatic light obtained by applying a 680nm interfer-
ential filter to a halogen lamp.
Pyranometer (Channel 9), calibration is performed by comparison to the reference
pyranometer by using the light produced by a halogen lamp. Light is perpendicular to
the thermopile surface. Calibration is performed in compliance with ISO 9847 ("Cali-
bration of field pyranometers by comparison to a reference pyranometer"), method
IIc.
It is recommended to check sensor calibration at least once per year.