SL130-EU-EN v3.6 08/13
6
MAX Hold
The MAX display indicates and holds the highest dB level measured since the
meter was turned on or since the Max Reset button was pressed. The time and
date of the max reading is also displayed.
To clear the display and start a new measurement session, press the front panel
MAX RESET button. If the measured level exceeds the maximum for the range
selected the MAX display will indicate “OL” (overload).
Programmable OFF/ON/AUTO time
The meter is powered by 8 AA batteries or via an AC adaptor for permanent installations.
Continuous battery life is approximately 240 hours (10 days). By programming 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 calibrated on a regular basis to assure
that the meter’s performance and microphone sensitivity has not
change. Some operational directives require daily calibration checks
(OSHA). Extech offers several acoustic calibrators to perform the
calibration.
1. Set the meter to the 60 to 110dB or 80 to 130dB range.
2. Place the external calibrator over the Sound Level Monitor's
microphone and turn the Calibrator on.
3. The meter should read close to the calibrator's dB output level.
Typical Calibrator output levels are 94dB and 114dB.
4. If the meter is within ± 0.2 dB of the calibrator’s output, no
adjustment is necessary.
5. Adjust the calibration pot on the rear of the meter to the proper level.
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. The
tripod mounting nut is located on the bottom of the unit.
www.
.com
1.800.561.8187
