Automatic Shutoff - Wohler SP 22 Bedienungsanleitung

2. Operation
2.9 Selecting Automatic and Manual Ranging
The meter features six measurement ranges in 10 dB steps: 30-80 dB, 40-90
dB, 50-100 dB, 60-110 dB, 70-120 dB, 80-130 dB.
When you turn the meter on, it will be in automatic range mode and a small
AUTO will be displayed on the left side of the screen. In this mode, the meter
will adjust the measurement range automatically for accuracy. The two digit
number to the left of the bar graph on the LCD will show the low end of the
current range.
You can also set the range manually. This is helpful when you know the
measurement range in advance. The meter will be able to take readings more
quickly, because the unit does not need to first establish the range before
displaying the measurement.
To adjust the range manually:
1. When measuring sound levels, press the DOWN and UPPER keys as nee-
ded to adjust the measurement range. MANU will appear on the display.
Note that the two digit number to the left of the bar graph will change to
reflect the low of the newly selelcted range.
2. Press and hold the DOWN and UPPER key to switch back to automatic
ranging.
If the meter is operating in manual range and UNDR is displayed, the sound
is too low for the range. If UPPER is displayed, the sound is too loud. In either
case, you must adjust the measurement range or your readings will be anac-
curate.

2.10 Automatic Shutoff

The meter will turn off automatically after 20 minutes to presserve the battery.
To override this feature:
1. Make sure the unit is turned off.
2. Press the ON/OFF and MAXHLD buttons simultaneously.
3. When the full display appears, release the MAXHLD button first.
4. Release the ON/OFF key. The meter will remain on until the ON/OFF button
is pressed again.
The automatic shutoff feature will resume the next time the meter is turned
on.
e-Mail: international@woehler.de www.woehler-international.com
Wöhler SP 22
17