EN300-EU-EN v1.3 4/14
6
Hygrometer Humidity & Ambient Temperature Measurement
1. Select the Relative Humidity function by pressing "Function Button" until the display indicates
%RH.
2. The humidity and temperature readings will be displayed on the LCD.
3. When the meter is placed into a new environment, a few minutes are required to reach a stable
condition.
Light Measurement
1. Select the Light Measurement function by pressing the "Function Button" until a light unit (Lux
or Ft-cd) is displayed.
2. Press the "Lux/Ft-cd Button" to switch between "Lux" or "Ft-cd".
3. The Display will show the light value
Zero Offset calibration of Light Function:
For best results, zero the light sensor prior to use in a dark environment. To accomplish this,
completely cover the light sensor and then press the "Unit/Zero Button".
The zero point can drift due to environment temperature and battery power change. It is
recommended that the zero be checked frequently using the above procedure.
Sound Level Measurement
1. Select the Sound Level function by pressing the "Function Button" until the Sound level unit
(dB) is displayed.
2. Hold the instrument in one hand and point the microphone towards the noise source. The
sound level value (dB) will be displayed on the LCD.
