Wohler SP 22 Bedienungsanleitung Seite 16

2. 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 measure-
ments.
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 re-
cording 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.
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Wöhler SP 22