Sper Scientific 850071 Environmental Quality Meter - Manual (Page 19)

19
Zero Adjustment
During light measurement, if the display does not show
a value of 0 when the light sensor is completely covered,
zero adjustment is needed.
1. With the sensor covered, press LOGGER for
>3 seconds. “0” appears on the LCD.
2. Uncover the sensor to resume normal measurement.
Sound Meter
The optional sound adapter permits the meter to measure
sound in decibels.
1. Press and hold POWER for 2 seconds to turn
the meter off.
2. Plug the sound adapter plug into the probe
input socket.
3. Turn on the sound adapter.
4. Press
POWER to turn the meter on. “Sound” will
appear on the LCD, and then the meter will return to
Normal Mode. Sound levels will be displayed in “db”.