HD600-EU-EN v1.3 07/13
5
Measurements
MEASUREMENT CONSIDERATIONS
1.
Wind blowing across the microphone increases the noise measurement. Use the supplied
windscreen to cover the microphone when applicable.
2.
Calibrate the instrument before each use if possible. Especially if the meter has not been used
for a long period of time.
3.
Do not store or operate the instrument in areas of high temperature or humidity.
4.
Keep meter and microphone dry.
5.
Avoid severe vibration. Protect the meter from impact. Do not drop it. Transport the meter in
the supplied case.
6.
Remove the battery when the meter is to be stored for long periods of time.
BASIC OPERATION
1.
Turn the meter ON by pressing the
button.
2.
Select ‘A’ or ‘C” frequency weighting by pressing the A/C button.
3.
Select Fast or Slow response time by pressing the FAST/SLOW button.
4.
Use the LEVEL button to select the appropriate range. The range is shown near the top of the
display. Use a range that puts the sound level reading in the center of the range. If the OVER
or UNDER icons appear on the display, select a new range if possible.
5.
The numeric and bargraph displays indicate the sound level measurement.
6.
To turn the meter off, press and hold the
button for 3 seconds.
LEVEL
The LEVEL button is used to select the measurement range. Press this button to step through the
ranges as indicated on the display (30 to 80, 50 to 100, 80 to 130, or 30 to 130 autoranging)
A/C FREQUENCY WEIGHTING
Press 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/SLOW RESPONSE TIME
Use the FAST/SLOW button to select a FAST (125 ms) or a 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.
HOLD
Press the HOLD button “freeze” the current reading in the display. Press the button again to resume
normal operation.