Magnetic Field | Temperature | Sound Level | Lux | Rotation How to Use

How to use illuminometers or lux/light testers, and the principles behind the measurement method.

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01. Lux Meter | Measurement Methods and Principles

Illuminometer principles

Illuminometers quantify the brightness of a lit surface by measuring luminous flux per unit of area. The instrument must have the same sensitivity as the human eye for each light wavelength, and they must perform cosine correction for the angular incidence of light. (The JIS C 1609-1 standard defines performance requirements for illuminometers.) The illuminometer’s light sensor consists of a photodiode that converts light into an electrical signal, an optical filter that ensures the same sensitivity as the human eye, and a diffusing globe that facilitates cosine correction, thereby satisfying the requirements for this type of instrument. (Block diagram)


How to Use the Lux Meter

Basic introduction to using a Hioki lux meter.
Introduces how to use Hioki’s FT3424 lux Meter, from zero-adjustment and the hold function to making measurements. Since the instrument’s memory function lets it store measured values, there’s no need to take notes by hand in the field. In addition, a timer hold function and connection cable make it possible to measure illuminance after moving away from the instrument.


02. How to Use the Infrared Thermometer

How to Use the Hioki Infrared Thermometer FT3700/FT3701

Basic introduction to using a Hioki infrared thermometer.
Introduces how to use Hioki’s FT3700/FT3701 Infrared Thermometer, from activating the laser marker and setting the emissivity to making measurements. The instrument makes it easy to measure the temperature of targets such as an air-conditioner outlet some distance away, a circuit-breaker in a distribution panel that poses the risk if touched, and an operating motor.