2. • Lux, unit of illumination in the International
System of Units (SI).
• One lux is the amount of illumination
provided when one lumen is evenly distributed
over an area of one square metre.
• Lumen, unit of luminous flux, or amount of
light, defined as the amount streaming outward
through one steradian (a unit of solid angle,
part of the volume of space illuminated by a
light source) from a uniform point source
having an intensity of one candela.
• Luminous intensity, the quantity of visible
light that is emitted in unit time per unit solid
angle.
• One lux is equal to 0.0929 foot-candle.
LUX Meter
3.
4. Operation of the lux meter
1. Switch "ON" the lux meter.
2. Ensure initial reading should be "Zero“
3. Select the range as per the requirement (A or B or
C).
4. Hold the light sensor facing towards the light.
5. The display will show Lux value.
6. The multiplication of displayed value with
multiplying factor will be the actual lux.
Monitoring of lux level
1. Hold the lux meter at minimum five location.
2. Measure the lux at 1 meter height from ground level.
3. Record the readings in lux level monitoring record.
4. The average lux of all readings will be the lux level in
the room.
