The MW400 is an optional short term weather proof windshield assembly
that can be used (depending upon the environment) for up to 7 days
continuous outdoor monitoring.
Place the microphone stem, with microphone capsule attached, into the hole
at the base of the MW400 Weatherproof Windshield.
Once inserted turn the screw at the base of the MW400 until it tightens
against the microphone stem. Be careful not to over tighten as this can cause
damage to the microphone stem.
The MW400 should now be attached to a tripod via the tripod adapter.
A
TTACHING
T
HE
M
ICROPHONE
TO
THE
MW400
W
INDSHIELD
Tripod Adapter
Microphone
Stem
MW400
14
It is recommended that your sound level meter is calibrated each time it is used.
Follow the instructions below to calibrate your Pro DX sound level meter or refer
to the meters operating manual for more in-depth information: -
Firstly ensure that your microphone preamplifier is plugged into your
microphone extension cable, then plug the microphone extension cable into the
socket labelled ‘microphone’ on the KA018 case.
TAKE EXTREME CARE WHILST HANDLING YOUR MICROPHONE, IT IS AN
EXTREMELY SENSITIVE DEVICE AND VERY COSTLY
Press the
Power
key on you Pro DX meter to turn on your instrument
Once powered up you are presented with an option to calibrate your instrument
by selecting YES / NO. Press the Light Blue Arrow key directly beneath YES on
the screen.
Carefully and gently push a Castle GA607 calibrator over the microphone. A
small amount of resistance should be felt as the o-ring seal on the calibrator
forms a seal around the microphone.
Ensure the calibrator is set to 94dB. (Note that the calibrator automatically
turns OFF after approximately 1 minute)
Using the Light Blue Arrow keys on the Pro DX Meter, select the correct level
for calibration. This figure needs to take into account all the correction factors
such as the atmospheric pressure and microphone type in use with the
calibrator used. For the example purposes we will assume these have been
taken into account and are 94.0dB.
Press the large
OK
button on the Pro DX Meter to start calibration.
Calibration of your Pro DX Meter will take 5 seconds to complete and your
instrument should read 94.0dB once completed.
If you encounter any problems during calibration, ensure that the microphone is
inserted into the calibrator cavity correctly and also that the calibrator is
switched on.
7
P
RO
DX S
OUND
L
EVEL
M
ETER
C
ALIBRATION
S
OUND
M
ETER
