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Lux and luminance meter calibration

LuxCal250 from Bentham

The LuxCal250 provides accurate luxmeter calibration over an exceptionally wide dynamic range. Comprising a light-tight enclosure housing standards of illuminance, Bentham’s LuxCal250 presents a straightforward and cost-effective calibration solution obviating requirements typical of traditional, distance-based calibration.Designed as a high-performance, all-in-one calibration solution, the capabilities of the LuxCal250 may be extended to encompass precise luminance meter calibration with the LumiCal50, alongside representing a UKAS accredited calibration device with the LuxCal+.

Features

Houses standards in light tight enclosure with easy access to position devices under test
Colour shifted (2856K quartz tungsten halogen (QTH) standards (CIE illuminant A)
Output level of the illuminance / luminance calibrator is varied via neutral density filters,
Lab jack and height gauge, featuring a laser alignment aid, allow accurate positioning of device under test
Calibration traceable to Physicalish Technische Bundesanstalt (PTB, Germany)

Further information

Core benefits

Calibrate luxmeter/ luminance meters in accordance with ISO/CIE 19476:2014
No darkroom or optical bench required to achieve wide dynamic range
Calibration traceable to PTB, Germany
Optional luminance or UKAS accredited calibration

Reported parameters

Illuminance (lx)
Optional Luminance (cd.m^-2)

Specifications

LuxCal250

Lamp type	Quartz Tungsten Halogen lamp, G6.35 base
Nominal lamp power and voltage	250W, 12V
Operating current	10.4A (adjusted to obtain 2856K operation)
CCT	2856±10K
Expected lifetime	2000 hours
Calibration frequency	100 hours use/ one year recommended
Dimensions	600L x 500W x 700H (mm)
Typical illuminance level one (no filter)	19000 lx
Typical illuminance level two (ND1)	1800 lx
Typical illuminance level three (ND2)	180 lx
Typical illuminance level four (ND3)	20 lx
Typical illuminance level five (ND4)	2 lx

LumiCal50

Lamp type	Grit-blasted Quartz Tungsten Halogen lamp, G6.35 base
Nominal lamp power and voltage	50W, 12V
Operating current	4.0A (adjusted to obtain 2856K operation)
Expected lifetime	2000 hours
Calibration frequency	100 hours use/ one year recommended
Typical luminance level one (no filter)	21000 cd.m^-2
Typical luminance level two (ND1)	1800 cd.m^-2
Typical luminance level three (ND2)	200 cd.m^-2
Typical luminance level four (ND3)	30 cd.m^-2
Typical luminance level five (ND4)	3 cd.m^-2

LuxMeter+

Spectral function	V(λ) photometric
V(λ) matching error	f1 ≤ 3 %
Typical responsivity	0.5 nA/lx
Diffuser diameter	7mm
Cosine matching error	f2 ≤ 1.5 %
Typical minimum detectable illuminance	20 mlx
Typical maximum detectable illuminance	20 klx
Display	5 digits, auto-ranging
Power supply	Mains transformer
Interface	USB 2.0

610 Constant current power supply

Input voltage	100V - 220V, 5A max, 50-60Hz
Output voltage & current	0-10.4A in remote use. Max Voltage: 26V
Connection type	IEC mains input connection
Resolution	0.1A local; 0.001A over SCPI protocol
Operation modes	Remote mode PC: SCPI protocol allows the Set Current to be assigned to an accuracy of 1mA Local mode Pre-set: Allows pre-set Current settings to be selected Variable: Used to set the current between 0-10.4A, indicated on the display
Current pre-set	4.00 A, 5.40 A, 6.30 A, 8.50 A, 10.40 A, 0-10.4A variable
Max output power	250W
Setting control	Remote setting by user interface controlled through USB Local setting by rotary switch (fixed current or variable settings)
Operating conditions	Ambient temperature: 0°C - +40°C Storage temperature: -20°C - +85°C
Drift	0.05% of rated output (Over an 8-hour interval with constant line, load and temperature, after a 30-minute warm-up period)
Temperature stability	30ppm/°C
Compliance to standards	EN 61010-1:2010 EN 61326-1:2013
Accuracy	±(0.04% +0.05A)
Output power ripple	<0.1%
Dimensions	450L x 300W x 130H (mm)
Weight	5 kg
Mode types	Constant Current, Constant Voltage

Applications

ISO/CIE 19476:2014, Characterization of the performance of illuminance meters and luminance meters
CIE S 023/E:2013, Characterization of the performance of illuminance meters and luminance meters
Luxmeter calibration
Luminance meter calibration
UKAS accredited calibration