UEi Test Instruments DSM101 - Manual (Page 4)

Insert the microphone into the hole of the calibrator. Press calibrator
key to power on, and adjust the CAL potentiometer of the unit, the
level display will indicate the desired level. While selecting C weighting,
display +/-0.3 dB deviation is reasonable.
Replacing the Battery
When the icon of " " appears, the 9V battery has fallen to
a critically low voltage level and should be replaced as soon as
possible. Use a screwdriver to unscrew the back battery compartment
cover. Insert 4 fresh AAA batteries and screw the cover back on.
Diagram O
1. Calibration Adjustment
(side) By using a Phillips (+)
screw driver to adjust the
calibration (Follow the
calibration instruction).
2. Tripod Mount
Mount the meter to a
camera tripod for increased
stability and accuracy, further
eliminate hand or any sound
reflected form the user.
CE Certification
The meter conforms to the following standards:
EN 50081-1/1992 : EN 55022
EN 50082-1/1997 :
(EN 61000-4-2/-3/-8, ENV 50204)
The meter complies with the essential protection requirements of
Council Directive 89/336/EEC on the approximation of the laws of the
Member States relating to electromagnetic compatibility.
If the meter is operating in manual range and "LO" is displayed, the
sound is too low or the range.
If "HI" is displayed, the sound is too loud. In either case, you must
adjust the measurement range or your readings will be inaccurate.
Diagram L Diagram M
Automatic Shutoff
The meter will turn off automatically after 20 minutes to preserve
the battery.
To override this feature:
1. Make sure the unit is turned off.
2. Press the “ “ and "MAX HOLD" buttons simultaneously.
3. When the full display appears, release the “ “ button,
“ “ icon will appear on the screen, now release the “MAX HOLD“
button, " " will be replaced with full display.
4. The meter will remain on until the “ “ button is pressed again.
The automatic shut off feature will resume the next time the
meter is turned on.
Diagram N
Calibration
Using a standard Acoustic Calibrator which generate "94 dB" output.
1. Set whichever time weighting: Fast or Slow.
2. Set sound level range at: 80-110 dB.
3. Select weighting A or C.
4. MAX HOLD function measurement mode disabled.
5. Calibrate under 60 dB sound environment. (recommended)
DSM101-MAN P. 3