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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.
Introduction Congratulations on your purchase of the Extech SL120 Sound Level Monitor. Designed for wall mount, desk, tripod mount or hand held operation, this meter meets ANSI and IEC Type 2 Sound Level Meter standards. Included is a High Limit Set Point with a large OVER indication when the set level is exceeded.
Meter Description Microphone Over Limit Display Bargraph dB display OFF/ON/AUTO switch Clock display Max level display with time stamp Set limit MAX RESET button Rear Panel Range select switch 4 5 6 Time set buttons 30-80 80-130 Limit set buttons LIMIT Calibration adjustment 60-110...
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Sound Level Monitor Operation Initial Configuration 1. Install 8 AA batteries 2. Setting the TIME Press and Hold the Time SET button until the hours display begins to flash. Press the Time up arrow button until the hour is set. Press the SET button.
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Over Limit Set Press the up or down LIMIT arrow buttons to set the OVER limit level as displayed on the LCD. If the measured dB level exceeds the set limit, the indication will appear in the display and the over limit signal will appear at the alarm output connector.
Meter Placement The meter can be used Handheld, Wall mounted, Desk mounted or Tripod mounted. For wall mount operation, orient the microphone perpendicular to the wall to minimize the affect of acoustic reflections. For desk mounting, extend the rear legs and lock in place with the hinged locks.
Measurement Considerations 1. Use a windscreen (not included) to cover the microphone in windy conditions. 2. Calibrate the meter often, especially if the meter has been idle for a long period of time. 3. Do not store/operate the meter in areas of high temperature or humidity. 4.