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Extech Instruments SL120, User Manual, Page: 1 / 7

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User's Manual  

 

 
 
 
Sound Level Monitor 

 

Model SL120 
 

 
 

 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

Meets ANSI and IEC Type 2 Sound Level Meter Standards 

 

Settable High Limit with large OVER indication and Alarm Output 

 

Wall or Desk mountable 

 

Extra large LCD display with bargraph 

 

Maximum level display with time stamp 

 

Optional alarm kit drives remote over limit indicators. 

 

Test Equipment Depot - 800.517.8431 - 99 Washington Street Melrose, MA 02176 - FAX 781.665.0780 - TestEquipmentDepot.com

 

Summary of Contents for SL120

Page 1: ...Limit with large OVER indication and Alarm Output Wall or Desk mountable Extra large LCD display with bargraph Maximum level display with time stamp Optional alarm kit drives remote over limit indicators Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com ...

Page 2: ...ble ON OFF time extends battery life to 30 days when programmed 8 hours per day Careful use of this meter will provide years of reliable service Specifications Applicable standards Meets IEC 60651 1979 and ANSI S1 4 1983 Type 2 SLM standards Display 4 6 x 3 125 multifunction LCD Frequency bandwidth 31 5 Hz to 8 KHz Microphone 0 5 Electret Condensor Microphone remoteable Measurement ranges 30 to 80...

Page 3: ...5 OFF ON AUTO switch 6 Clock display 7 Max level display with time stamp 8 Set limit 9 MAX RESET button Rear Panel 1 Range select switch 2 Time set buttons 3 Limit set buttons 4 Calibration adjustment 5 A C select button 6 F S select button Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 FAX 781 665 0780 TestEquipmentDepot com ...

Page 4: ... is suitable for the sound level analysis of machines engines etc Most noise measurements are performed using A Weighting and SLOW Response Slow Fast Response Press the button to select Fast or Slow response as desired F or S will appear in the bottom of the LCD display Select FAST to capture noise peaks and noises that occur very quickly Select the SLOW response to monitor a sound source that has...

Page 5: ...mming the ON OFF time the battery life can be greatly extended 30 days assuming an 8 hour day The ON and OFF times are programmed as described in the initial configuration paragraph The meter will operate continuously with the power switch in the ON position The ON OFF time will be controlled by the meter when the power switch is set to the AUTO position Calibration The sound level meter should be...

Page 6: ...o remove the microphone unscrew the holding collar and lift the microphone off the connector The extension cable can then be plugged into the matching connectors Calibration should be performed after the cable is installed Alarm Output optional The alarm output drives the optional Remote Alarm Relay Module cable and relay when the LIMIT set point is exceeded The relay module can be used to power e...

Page 7: ... the meter in areas of high temperature or humidity 4 Keep the meter and the microphone dry 5 Avoid severe vibration when using the meter 6 Remove the battery when the meter will be stored for long periods of time Frequency Weighting curves OSHA permissible levels Permissible Noise Exposure Limits Duration per Day hours Sound Level db A Slow response 16 85 8 90 6 92 4 95 3 97 2 100 1 1 2 102 1 105...

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