Manual
7
5.5.2 Light
To c
hange the measuring unit of the light, press the “UNITS” button when light measuring is active. You
can choose between lx and Fc.
5.6 ON/OFF button
By pressing the “ON/OFF” button once, you can turn the device on. To turn the device off, you have to
press and
hold the “ON/OFF” button for 3 seconds.
5.7 MODE button
If the device is turned on, press the “MODE” button to select the desired function. You can choose
between sound level, air velocity and light.
5.8 MAX/MIN recording
When in measuring mode, press the “MAX/MIN” button once to activate the capturing of the maximum
value.
A “MAX” indication appears and the maximum value is shown on the display. To activate the
minimum value capturing, press the “MAX/MIN” button again. The display now shows the minimum value,
as w
ell as a “MIN” indication. To exit the “MAX/MIN” mode just press the “MAX/MIN” button once more.
5.9 Select the temperature unit
To change the temperature unit,
press the “°C/°F” button. You can choose between °C and °F.
5.10 Sound level calibration procedure
You can calibrate the device for sound level measurements by using an optional calibrator. To do so,
follow these steps:
1. Set the frequency weighting of the calibrator to A-weighting (dBA).
2. Carefully insert the microphone into the insertion hole of the calibrator (94 dB @ 1kHz).
3. Turn on the calibration and use the potentiometer (calibrat6ion screw) on the side of the device
(see #12 in chapter 4.1) to adjust the displayed value, until 94.0 dB is shown.
Note: Every device is calibrated before the delivery. We recommend a recalibration once a year.
