Full Product Manual

Operation
1. Power the meter by pressing the
power button. The meter will begin displaying sound level
readings. If the LCD does not switch on, check the 9V battery
located in the rear battery compartment.
1. Hold the meter in hand facing the microphone toward the source of the
sound to be measured.
2. View the measurement on the meter’s LCD. An indication of OVER means that
the measurement is out of range. Toggle the ‘Hi’ (65 to 130dB) and ‘Lo’ (35 to
100dB) measurement ranges using the HI/LO button. For measurements in the
65 to 100dB region either range can be used.
‘A’ and ‘C’ Frequency Weighting
Use the ‘A/C’ button to select ‘A’ or ‘C’ frequency weighting. With ‘A’
weighting selected, the frequency response of the meter is similar to the
response of the human ear. ‘A’ weighting is commonly used for
environmental or hearing conservation programs such as OSHA
regulatory testing and noise ordinance law enforcement. ‘C’ weighting is
a much flatter response and is suitable for the sound level analysis of
machines, engines, etc.
Most noise measurements are performed using 'A' Weighting
and SLOW Response. ‘FAST’ and ‘SLOW’ Response Time
Use the ‘F/C’ button to select FAST (125 ms) or SLOW (1 second)
response time. Select FAST to capture noise peaks and noises that occur
very quickly. Select the SLOW response to monitor a sound source that
has a consistent noise level or to average quickly changing levels.
Select Slow response for most applications.