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Views on the Edge
Logging
18
Logging
eg5 model only logs at one minute intervals and includes the following measurements:
Meter 1 logs L
avg
/L
eq
• Meter 2 logs L
avg
/L
eq
Meter 3 logs L
avg
/L
eq
• Lc
pk
and L
max
Lc-a (if enabled)
If the dosimeter runs for one hour, then it will log 60 Lavg/Leq results, and 60 Lmax/Lcpk levels. In DMS, you
can customize the logged data chart results by checking Lavg/Leq, Lcpk, and/or Lmax measurement values.
Views on the Edge
The Edge is a user-friendly and customizable dosimeter. With a simple click of a checkbox in DMS, you can
select the appropriate measurement values or views to appear or not appear on the display of your
dosimeter. The following table briefly identifies the displayed data values and views with a brief definition.
(See the glossary for additional information of these terms.)
Definitions of data log values and views
To set up the Edge and work with noise-level data, you will want to have a good understanding of the terms
listed in Table 3-1.
NOTE:
The following table is based on A-weighted, slow measurements. Thus, if you choose A or C-
weighted with Fast or Slow response the measurement values will change on the display (i.e., you
selected sound pressure level with C-weighting with Fast response, it will display as L
CF
.) For further
details, please see Table 3-2.
Views on
the EDGE
Explanation
L
AS
Sound pressure level
-
is the basic measure of noise loudness, expressed in decibels. (In DMS
this is noted as “SPL”)
L
ASMX
Maximum sound level
- is the highest sound level recorded during a measurement interval with a
particular response setting (Slow or Fast) and weighting (A or C). LMax is the highest value that is
included in LAvg or dose calculations.
Under OSHA regulations, unprotected workers may not be exposed to maximum sound
levels greater than 115dB, measured with a Slow response rate.
L
CPK
Peak Level
- is the highest instantaneous sound pressure level recorded during a measurement
interval. Unlike the maximum level, the peak is detected independently of dosimeter settings for
response rate or weighting.
Under OSHA regulations, unprotected workers may not be exposed to peak sound
levels greater than 140dB.
L
ASMN
Minimum sound level
- The lowest sampled sound level during the measurement interval
allowing for the unit’s Response Time setting (Fast or Slow).
L
AVG
Average sound level
-
(in dB) computed for a chosen time duration, based on a 4, 5, or 6dB
exchange rate.
L
AVG
with a 3dB exchange rate is referred to as LEQ (equivalent sound level). All
sound levels at or above the threshold level are averaged into the calculations relating to noise
exposure.
L
AVG
is typically calculated with no threshold, with a threshold of 80dB or with a
threshold of 90dB.
Table 3-1: Dosimeter views and definitions
Summary of Contents for Edge eg5
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Page 58: ...49 Appendix A Edge Block Diagram Analog Board ...
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Page 68: ...59 Appendix C Appendix C Measurement equations APPENDIX C ...