Manual
7
5.4
Alarm settings
The alarm LED flashes when the current reading is equal to or higher than the alarm threshold. The pre-
set alarm threshold is 85 dB. You can change it to values between 30 and 130 dB.
1. Press and hold the delete / menu button (1.7) for about 5 seconds
until the “AL” indication
appears on the display.
2. Now you can choose a threshold level by using the up (1.10) and down (1.11) buttons.
4. To exit this menu, press any button but the up or down button.
5.5
Auto Power Off
The pre-set time for the Automatic Power Off is 5 minutes. This means, that the device shuts down
automatically after 5 minutes if no buttons are pressed during this period. You can change this time
period to values between 1 and 9 minutes.
1. Press and hold the delete / menu button (1.7)
for about 10 seconds, until “AUTO” appears on the
display.
2. Now you can change the time by using the up (1.10) and down (1.11) buttons.
3. To deactivate the Automatic Power O
ff function, set the time to “0”. Now the device can only be
turned off by using the ON / OFF button (1.6).
4. To exit this menu, press any button but the up or down button.
5.6
Calibration
The device can be calibrated in two different ways:
5.6.1
Calibration via the integrated calibration signal
1. Turn on the device.
2. Use the function button (1.4) to select the calibration function. Now,
“CAL” appears in the upper
left corner of the display.
3. Turn the calibration screw (1.12) until the value shown on the display is 94 dB.
5.6.2
Calibration via the optional sound calibrator PCE-SC42
1.
Turn on the device and set the frequency weighting to “A” and the time weighting to “slow”.
2. Us
e the function button (1.4) to choose the calibration function. Now, a “CAL” indication appears
in the upper left corner of the display.
3. Turn the calibration screw (1.12) until the value shown on the display is 94 dB.
5.7
How to replace the batteries
When you see the battery indication in the upper right corner of the display, the batteries need to be
replaced. To do so, open the cover of the battery compartment on the back of the device, remove the old
batteries and put in 4 new 1.5 V AAA batteries.
Note:
If you do not use the device for a long period of time or if you use it in combination with a mains
adaptor, you should remove the batteries.
