2. The meter should read close to, or exactly, the calibrator's dB output level. Typical
Calibrator output levels are 94dB and 114dB.
3. If the meter is within ± 0.2 dB of the calibrator’s output, no adjustment is necessary.
4. Adjust the calibration pot in the output/calibration compartment if necessary to bring the
meter display in line with the calibrator output signal.
Taking Measurements
1. Hold the meter in hand, place it on a desktop (using the rear tilt stand), or mount it on a
tripod using the tripod mount on the rear of the meter.
2. Point the microphone toward the source of noise/sound to be measured.
3. Read the measurement, in dB units, on the LCD display.
Data Hold
1. Press the HOLD button to freeze the displayed reading. The LCD will display the icon
HOLD when Data Hold is engaged.
2. Press the HOLD button to de-activate this feature. The HOLD icon will extinguish.
3. Note that Data Hold is not available while the meter is in the Max/Min Record mode.
Max Hold
1. Press the MAX HOLD button to activate this feature. The LCD will display PH when
Max Hold is engaged.
2. The meter will now display only the highest reading. Each time a higher reading is
encountered the display will update.
3. Press the MAX HOLD button again to de-activate this feature. The PH icon will
extinguish.
4. Note that Max Hold is not available while the meter is in the Max/Min Record mode.
Max/Min Data Recording
The Max/Min feature stores the maximum reading and minimum reading while the user
takes measurements. The Max and the Min readings can later be recalled.
1. Press the REC MAX/MIN button to activate this feature. The LCD will display the icon
REC and the meter will begin monitoring the highest (Max) and lowest (Min) readings.
2. After measurements are made, press the REC button again to view the Max reading.
The MAX icon will appear on the LCD along with the highest reading.
3. Press the REC to view the minimum (MIN) reading. The 'MIN' display icon will appear
on the LCD along with the lowest reading.
4. To exit this mode,
press and hold
the REC button until the REC indicator
extinguishes.
5. To clear a Max or Min reading, press the HOLD key while viewing either the MAX or
MIN value. Note that exiting the Record mode also clears the MAX and MIN values.
Analog Output
The AC analog output transmits 0.5V AC rms full scale. The output impedance is
600Ω maximum. The mono 3.5mm mini-jack is located in the output/calibration
compartment on the right side of the instrument. Use a phono plug (3.5mm mono) to
connect to the output jack.
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407768 Version 2.0 06/06
EXTECH [ EXTECH INSTRUMENTS CORPORATION. ]
