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4. Calibration
Use a standard sound level calibrator (94dB, 1KHz sinus wave).
1. Use the following settings :
Display : dBA
Time Weighting : FAST
Measurement Mode : MAX/MIN function
deactivated
Level Range : 50 to 100dB
2. Connect the microphone with the calibrator through
the microphone connection of the DVM1325.
3. Activate the calibrator and adjust the CAL
potentiometer on the side of the device. The display
will indicate the desired level range. This device has
been calibrated by the manufacturer. Maximum accuracy can be expected during a one-year period after
calibration. Consequently, the device should be recalibrated every twelve months.
5. Preparing for Measurements
a) Inserting the battery : Remove the battery cover at the back of the device and insert one 9V-battery. Observe
b) Replacing the battery : The
6. Operating Precautions
a) Wind blowing around the microphone causes additional extraneous noise. Mount the windscreen when
performing measurements under windy circumstances.
b) Recalibrate the instrument prior to use if it has not been used for some time or if it was last used in a difficult
environment.
c) Do not store or operate the instrument under excessive temperatures or humidity for a prolonged period of time.
d) Keep the microphone dry and avoid severe vibrations.
e) Remove the battery if the device is not be used for several days.
DVM1325
All manuals and user guides at all-guides.com
: OVER indicator (value is higher than the upper limit of the measuring range) and
UNDER indicator (value is lower than the lower limit of the range).
: 1Vrms at full scale
Output impedance : ±100Ω
FS (full scale= the upper limit of each range).
: 1 x 9V-battery, 006P or IEC 6F22 or NEDA 1604
: ± 70hrs of continuous operation with an alkaline battery
: 0 to 40°C / 32 to 104°F
: 10 to 90%
: -10 to +60°C / 14 to 140°F
: 10 to 75%
: 232 (L) x 54 (W) x 34 (H) mm
: ± 200g (including battery)
: 9V-battery, screwdriver, user manual, windscreen.
the polarity indications inside the battery compartment !
-symbol will flash on the display when the battery needs to be replaced.
Fig. 1
2
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