Illuminance Meters

Product Overview

• Relative spectral response
  For the measurement of illuminance, ideally the relative spectral response of the meter should perfectly match the sensitivity of the human eye for photopic vision, as represented by the CIE spectral luminous efficiency V(λ).
• Cosine correction characteristics
  Since the brightness of the measurement plane is proportional to the cosine of the angle at which the light is incident, the response of the receptor must also be proportional to the cosine of the incidence angle.

Principal Applications

• Official government testing
• R&D by illumination manufacturers
• Repair and maintenance in factories, offices, and hospitals
• Quality control by manufacturers of home-use lighting products
• Examination of commercial light sources
• Illuminance control in agriculture and forestry

Main Features

• Multiple functions and convenient operation
  The multi-function T-10 also features a key cover to prevent accidental operation.

• PC linking and continuous storage using a recorder
  Digital output: An RS-232C terminal supports direct connection to a PC.
  Analog output: When connected to a recorder, illuminance values can be stored in a continuous fashion.

• Automatic zero adjustment for immediate measurement
  As soon as the power is turned on, the T-10 automatically carries out zero adjustment, (even when a cap has not been fitted), thus allowing measurement operations to be started almost immediately.

• Auto-range functions for a wide measurement range
  Manual setting of ranges is also possible.

• LCD backlight is automatically controlled for low illuminance and hold.

• Powered by standard AA-size batteries.

• Flickering light sources can also be measured.

Features

Miniature Φ16.5mm receptor head with 1m connecting cable enables measurements in tight places where the normal T-10 cannot fit. Measuring range, accuracy, etc. are the same as the T-10.

Applications

Measurement in confined areas
Spot measurements where illuminated area is small

<Notes on the shape and size of the mini receptor>
The shape of the mini receptor head units (T-10M, T-10WL and T-10WS) was changed in May 2008; the size is approx. 1 mm higher than the existent units. When the mini receptor head unit is used in a measuring range of less than 50 cm, note that the displayed value may be different from that of the existent unit by several percent.