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1. Instrument characteristic
KF-10 photometric calibrator is a source of luminous exitance (radiated
surface density of luminous flux) about 100lm/m2. It is designed to periodic
tests luxmeters made by SONOPAN. The device generating illuminance
about 100lx in reception field of photometric probe. Optical system and
electronically controlled light source guarantee high stability of luminous
flux. Very long life of used light source makes not expected to change it
during the life of the device. Instrument is equipped with automatic switch
off function. Time of single period is about 1min.
Photometric calibrator is an indispensable tool for any laboratory having
implemented a quality system.
WARNING: Checking luxmeters using KF-10 photometric calibrator can
not replace periodic calibration in accredited laboratory.
2. Technical specification
• Luminous exitance: M≈100lm/m2
Illuminance in the reception field
of photometric probe: E≈100lx
• Light source color temperature: Tcp≈3000K
• Illuminance stability:
for single working period: typically ±0,1% (max. ±0.3%)
after 3000 periods or 1 year ±1%
• Operating temperature: 0÷40°C
recommended operating temperature: 23±3°C
• Temperature coefficient: <0.02%/K
• Operating humidity: ≤80%
• Power supply AC adapter +12V 0.6A
Spectral distribution of KF-10 calibrator’s light source is different than
illuminant used during luxmeter calibration (typically illuminant A). That
causes indication deviation, which depends on quality of the match of
photometric probe spectral response to spectral luminous efficiency of CIE
standard photometric observer. For luxmeters made by SONOPAN that
deviation not exceed 0.03% for class A luxmeters and 0.15% for class B
