Integrating Sound Level Meter / EN
08/15/16 Version No. 01
28
12. OUTPUT CONNECTORS
12-1 AC Output:
An AC signal corresponding to the frequency-weighted signal is available at this
connector.
Output voltage: 2Vrms
±
100mVrms (scale upper limit)
Output impedance: approx. 5k
Ω
Load impedance:
≧
1M
Ω
The output voltage when the instrument is in calibration mode
(-6dB from scale upper limit, 1000Hz sine wave) is 0.5Vrms.
12-2 DC Output:
A level-converted DC signal generated by RMS detection and logarithmic
compression is available at this connector. The signal reflects the frequency and
time weighting settings of the instrument.
Output voltage: 10mV
±
0.1mV/dB
Output impedance: approx. 5k
Ω
Load impedance:
≧
1M
Ω
The output voltage when the instrument is reading 94dB is nominally 0.94V DC.
12-3 Alarm output
Setting the sound level alarm high limit
1. Press
button turn off the meter.
2. Press and hold down
button then turn on the meter, enter to sound level
high limit setting mode, the “ALARM” symbol is displayed.
3. Press
and
buttons to set desired sound level high limit value.
4. Press
button to stored the setting and exit this mode.
5. If the measured dB level exceeds the set limit, the over limit signal will appear at the
alarm output connector (5Vdc output). The output signal will remain active as long
as the sound level exceed the set limit.