Full Product Manual

Calibration
To calibrate the SLM400 an external calibrator that can provide a 94.0dB signal
at 1 kHz is required in addition to a small screw-driver.
1. Open the battery compartment and locate the two calibration
potentiometers behind the 9V battery (see
diagram)
1. Put the meter in the ‘C’ weighting mode
2. Put the meter in the ‘FAST’ response mode
3. Place the SLM400 microphone into the calibrator.
Set the calibrator to output a 1kHz sine wave @
94dB
4. Put the meter in the LOW range
5. Adjust the ‘C (Lo)’ potentiometer for a display of
94.0 dB
6. Put the meter in the HIGH range
7. Adjust the ‘C (HI)’ potentiometer for a display of
94.0 dB
Battery Replacement
When the low battery icon BAT appears on the LCD replace the 9V
battery as soon as possible. The battery compartment cover is located on
the rear of the meter. Remove the Phillips screw to loosen the cover.
Slide the battery compartment cover off, change the battery, and replace
the compartment cover.
You, as the end user, are legally bound (Battery ordinance) to
return all used batteries and accumulators; disposal in the
household garbage is prohibited!
You can hand over your used batteries / accumulators at
collection points in your community or wherever batteries /
accumulators are sold