4. Press the
"REC"
key again. "
MAX"
will appear on screen side
by the
"REC"
and the maximum sound level recording at this
time, but the bar graph will continue to show the current reading.
Diagram I
5. Press the
"REC"
key again to resume recording and repeat
the process.
6. Press and hold the
"REC"
key until the
"REC"
indicator
disappears to exit recording mode.
Selecting Automatic and
Manual Ranging
The meter features 4 measurement ranges in 10 dB steps: 40-70 dB.
60-90 dB, 80 dB - 110 dB, 100 dB - 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.
Diagram J
Diagram K
In the manual range mode, 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. This is helpful when you know the
measurement range in advance.
To adjust the range manually:
1. When measuring sound levels, press the
"RNG"
keys as needed
to adjust the measurement range.
MANU
will appear on the
display. Note that the two digit numbers to the left of the bar
graph will change to reflect the low of the newly selected range.
2. Press "
RNG
" key to switch back to automatic ranging.
C weighting is suitable for the flat response measurements with
no increase or decrease of amplitude over the frequency spectrum.
Applications for C weighting include the sound level analysis of engines
and machinery.
Press the
"A/C"
key to select between A and C weighting. A small
"A"
or
"C"
icon will be displayed on the right side of the screen to indicate
the current mode.
Freezing the Maximum Sound
Level Reading
1. Press the key to turn the meter on.
2. When measuring sound levels, press the
"MAX HOLD"
key
to freeze the maximum reading.
"MAX HOLD"
will be
displayed. The digital display will remain unchanged until
a higher reading is detected. Note that the bar graph will
continue to record the current reading.
3. Press the
"MAX HOLD"
key again to exit maximum
hold mode.
Diagram F
Recording the Maximum and
Minimum Measurements
1. Press the key to turn the meter on.
2. Press the
"REC"
key. The
"REC"
icon will be displayed in
the upper corner of the screen. The meter will begin tracking
the maximum and minimum sound level measurements.
3. Press the
"REC"
key again.
"MIN"
icon will appear in the
upper middle of the screen and the minimum 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.
Diagram G
Diagram H
DSM101-MAN
P. 2
