BB106411.book : 2237-ch3 Black 11
Chapter 3 – Taking Measurements
Reading the Parameters
BB1064–11
3–11
2237 Controller
User Manual
3.3 Reading the Parameters
Seven parameters are monitored by the sound level meter.
Two parameters are displayed at a time; one for each of the
bottom two lines of the Measurement Window. To change the
set of parameters displayed on the screen, press .
The displayed parameters have the following meanings:
L
eq
(L
Im
) Equivalent continuous sound level over the elapsed
measurement time. This is the most useful param-
eter for giving an impression of the average sound
pressure level. Limits to L
eq
are normally promi-
nent in sound regulations. Note that when an Im-
pulse time weighting is used, then this parameter
is called “L
Im
”.
MaxP Maximum peak level. It is equal to the highest
value of Peak since the measurement started. This
parameter is normally important for occupational
health readings.
Fig.3.6 Parameters in the Measurement Window
RUN 00:05:41
MaxP 94.7 dB
AF Leq 45.8 dB
30 100
Frequency Weighting
Values
RMS Parameter
Peak Parameter
Time Weighting
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