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Basic setups

Measurement setup (for community noise)

C-A measurement settings

The C-A measurement is determined from concurrent measurements of the SPL by both meters. It can only be made if certain settings for Meter 1 and Meter 2 are compatible. If any incompatibility exists, the Lc-aselection in this screen will be marked N/A (Not Available).

If you want to activate Lc-a, have the following settings in place before you visit the Measures screen.

Thresholds - Both meters set to “Off” or the same value.

Exchange rates- Both meters set to the same value.

Time response - Both meters set to the same value.

Frequency weightings- Meter 1 must be set to A-weighting; Meter 2 must be set to C-weighting.

Figure 3-6 is an example of the appropriate C-A settings for Meter 1 (left side) and Meter 2 (right side). (Please see “Meter 1/Meter 2 Parameters” on page 27 for setup details.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Slow response

A-weighting

 

Meter 1

 

Slow response

C-weighting

Meter 2

 

 

 

Press softkey to

 

 

 

 

 

 

 

 

 

toggle between

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Meter 1/Meter 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 3-6: C-A measurement settings for Meter 1 and Meter 2

Models SE and DL

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Image 43
3M DL, SE user manual Measurement settings, Meter