If an over-range or under-range condition has occurred at
least once during measurement the “ OV ” or “ UN ”
indication is shown on the display, to indicate that over-
range or under-range data were included in the sound level
measurement values for processing.
During measurement, if change the frequency or time
weighting and sound level ranges, the stored maximum
and minimum sound level will be clear. The maximum
recorded elapsed time is 100 hours.
10-2 Store operations
1. To memorize the reading
Press “MEM” key each time to store one set
measurement data (L, Lmax, Lmin and each elapsed
time) in memory, and LCD will show “ M ” and memory
location numbers (1 to 99).
When the data number 99 is reached, the “FULL”
indication is shown on the display, does not change
further and does not return to 1.
2. To recall and read the reading
Press "READ" key to recall the reading memory data
mode. LCD will show " READ " and memory
location numbers.
Press “
▲
” or “
▼
” key to scroll through the logged
readings.
Press “MAX” key to cycle switch the stored currently
sound level with elapsed measurement time
the
maximum sound level (“max” is shown) with measured
elapsed time
the minimum sound level ( “min” is
shown) with measured elapsed time.
Press "READ" key again to exit READ mode.
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3. To clean the memory
Press “
” key to turn-off the meter.
Press and hold down “MEM” key then press “
” key
to turn on the meter, LCD will show “CLr” and all stored
data are clear.
OUTPUT CONNECTORS
3.5
φ
Plug Wiring Connection
Dc output
Ac output
Common output
AC Output :
An AC signal corresponding to the frequency-weighted signal
is output.
Output voltage : 1Vrms
±
100mVrms (scal upper limit)
Output impedance : approx. 5K
Ω
Load impedance :
≧
1M
Ω
The output voltage when the meter is in calibration mode
(-6dB from scale upper limit, 1000Hz sine wave) is 0.5Vrms.
DC Output :
A level-converted DC signal generated by rms detection and
logarithmic compression is output. The signal reflects the
frequency and time weighting settings of the meter.
Output voltage : 10mV
±
0.1mV/dB
Output impedance : approx. 5K
Ω
Load impedance :
≧
1M
Ω
The output voltage when the meter is in 94dB reading is
0.94VDC.
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