Cirrus Optimus Green Series, Instrument Hanbook

Page: 17 / 56

Optimus sound level meter - instrument handbook
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17
Soft keys
Arrow keys
Centre key
The ambient light sensor on the front of the instrument will illuminate the keypad and
adjust the brightness of the display automatically when the light level fails.
If the pause function has been activated (described on page 22), the right soft key
switches between pause and stop. Press once to pause / reverse back the measurement,
and twice to stop the measurement. Alternatively, press and hold the button for three
seconds to stop the measurement.
4.3 Connectors
The connectors used by the Optimus to communicate with a PC and NoiseTools are
at the bottom of the instrument under a protective cover.
Protective
cover
Open by
pulling
this edge
3.5mm socket
AC output
Wrist strap fastening pin
USB connector
Multi I/O interface
RS232 and DC output