3M eg3 用户手册

eg4 & eg3 

 

21 

 

 

Memory storage symbol –   
eg4:  The eg4 model displays the total memory storage 

remaining in hours and minutes.  For example, if it displays the 
memory symbol 181:50 this represents 181 hours and 50 
minutes of memory storage remaining on the dosimeter. 

eg3:  The eg3 model displays the memory by indicating the 
remaining number of studies it will store into memory. For 
example, if the eg3 displays “50” this indicates you can store 50 

studies on the dosimeter.  (Note:  the difference is because the 
eg3 model does not data log.) 

 

Calendar symbol– The calendar symbol and calendar field 

displays the day-month-year  

 

Battery power clock symbol – The battery power clock 
symbol identifies the number of hours and minutes of battery 
time remaining on the dosimeter.   

 

 
      

  Edge Measurement descriptors/variants 

         The following is an explanation of the Edge descriptors and equivalents for Lmax, Lmin, & Lpk. 

Sound pressure level - is the basic measure of noise loudness, expressed 

in decibels.  (In DMS this is noted as “SPL”) 

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 115 dB, measured with a Slow 
response rate. 

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 140 dB. 

Minimum sound level - The lowest sampled sound level during the 
measurement interval allowing for the unit’s Response Time setting (Fast or 
Slow).