Wohler SP 22 Bedienungsanleitung Seite 13

3. Operation
2.6 Recording the Maximum and Minimum Measurements
1. Press the ON/OFF key to turn the meter on.
2. Press the REC key. REC will be displayed on the bottom of the screen. The meter will
begin tracking the maximum and minimum sound level measurements.
3. Press the REC key again. MIN will appear on the bottom of the screen and the minimum
sound level measurement will be displayed. The unit is not recording this time, but the
bar graph will continue to show the current reading.
4. Press the REC key again. MAX will appear on the bottom of the screen and the maximum
sound level measurement will be displayed. The unit is not recording at this time, but
the bar graph will continue to show the current reading.
5. Press the REC key again to resume recording and repeat the process.
6. Press and hold the REC key untill the REC indicator disappears to exit recording mode.
2.7 Using the Background Noise Absorber
This feature allows you to measure equipment noise accruately, even in the presence of
high background noise.
1. Press the ON/OFF key to turn the meter on.
2. Press the MAXHLD key. MAX HOLD will be displayed.
3. Press the BA MODE key. F will be displayed to the left of the SPL (sound pressure level)
icon. The digital display will show the background noise level.
4. Press the MAXHLD key again and MAX HOLD will be displayed. The meter is now
ready to measure the actual machine noise.
5. Turn on the machine you want to measure and note the new sound level reading. This
number represents the sound level of the device without the background noise. If there
is no change in the reading, the background noise is greater than the noise of the
device.
6. Press the MAXHLD key and then the BA MODE key to exit background noise absorber
mode.
2.8 Backlit Key
Offer a light for approximate 5 seconds to make it easier to see the display in the dark.
Manual instruction
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