Starting A Measurement - Cirrus Research CR:811C User Manual

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3.9 Starting a measurement

Broadband Mode
Key Press Display
If the user does not stop or reset the measurement, the instrument will run for the
preset measurement duration. At the end of the measurement, the information will be
automatically stored in the memory.
If the Auto-Repeat function is enabled, the next measurement will start automatically at
the end of the previous measurement.
1:1 Octave Band Mode
Key Press Display
If the measurement duration is set to Manual, the 1:1 Octave Band frequency will stay
on the current frequency until the Up arrow is pressed. At the end of the measurement,
the user must press the Stop key to end the measurement and store the information in
the memory.
When the measurement duration is set to any option other than Manual, the instrument
will automatically sweep through the 1:1 Octave Bands in the set duration. After the
16kHz 1:1 Octave Band, the instrument will measure a dB(A), dB(C) and then a dB(Z)
value and then stop, storing the measurement in the memory.
CR:800C Series Sound Level Meter User Manual
The calibration level is unstable.
The background noise level may
be too high or the acoustic
calibrator may not be fitted
correctly to the sound level meter.
Comments
When the measurement is
running, the display shows
"Running" in the top left hand
corner.
Comments
When the measurement is
running, the display shows
"Running" in the top left hand
corner.