Measuring Sound Pressure Level (SPL)
QU
IC
K
ST
AR
T
2
Display and Keys
1. LEDs: Used in the LED Alert measurement screen
2. Screen indicators:
Slow time response & A frequency weighting (S, A is a common setting)
3. Measurement type (SPL, L
EQ
/L
AVG
, LED Alert , MAX, MIN, Run-Time )
• Note: No indicator signifies SPL
4. Measurement value
5. F/S (Fast/Slow time response) key
6. Mode key (cycles through measurement screens)
7. Run/Stop key for averaging values (L
EQ/
L
AVG
, MAX, MIN, LED Alert , Run-Time )
8. Power On/Off key
9. A/C frequency weighting key
1.
Place windscreen over microphone (if not attached)
2. Power on the SD-200 and check that the battery indicator is not present.
•
If present, charge the instrument prior to measuring.
3. Select desired weighting and/or response time. (See diagram #5 and #9.)
4. Position the SD-200 microphone so it is angled about 70 degrees from the noise source.
5. Measures: when first powered on, the current SPL will be displayed or the last viewed parameter.
• For integrated measurements, press the Run/Stop key. (Unlike SPL, the L
EQ
/L
AVG
values
will provide steadier values over a period of time until values become more stable.)
• To view measurements, repeatedly press the Mode key. (
This cycles through the measurements.)
• Press Run/Stop key to Stop measuring.
6. Power off by pressing and holding the key until it turns off (while not in run mode).
9
5
6
7
8
1
3
4
3M
TM
Sound Detector SD-200