LM-20 Luminance Meter

Characteristic
Specification

LM-20 Luminance Meter Characteristic

High sensitivity
·High-sensitivity silicon photodiode sensor
·Low-noise, high-sensitivity circuit design
Luminance measurement
·Luminance low as 0.001 cd/m2
High speed · high precision
·Repetition accuracy: ±1%
·Accuracy: ±3%
·Sampling speed up to 100Kbs

LM-20 Luminance Meter Specification

Model	LM-20
Type	Luminance
Detector	Silicon cell (CIE 1931 Y filter)
Measurement Diameter	Ø2 mm, Ø4 mm, Ø10 mm or Ø27 mm
Working Distance	30±5 mm
Acceptance Angle	5º
A/D	16 bits
Display Range	0.0001 to 200,000 cd/m2
Luminance	Measurement range	0.001 to 200,000 cd/m2
	Accuarcy*¹	0.01 ~ 5 cd/m2 ±3% ≥ 5 cd/m2 ±2%
	Repeatability(σ)*¹	0.01 ~ 5 cd/m2 1% ≥ 5 cd/m2 0.5%
Flicker	FMA	Display range：0 ~ 100%；Accuracy：±1%
	JEITA	Measurement range：≤10
		Frequency range：0 ~ 128 HZ
		Accuracy：±0.5 db
Measurement Speed	0.01 ~ 5	1 sec
	≥ 5	20 / sec
	Flicker (JEITA or FMA)	1024 / sec
	2D or 3D charts and data export to EXCEL
Interface	USB2.0 / RS232
Operating Temperature	5 to 50ºC
Input Voltage	5V

*Measurement of luminance and chrominance is based on RayClouds conditions (using 1000cd/m2 standard light source, LED backlight, 6500K LCD display).

*Specifications and appearance are subject to change without prior notice.

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