Removal Of Microphone; Pre-Amplifier Removal & Fitting; Microphone Extension Cable - Castle group dBAir Operating Manual

Removal of Microphone

The microphone is fitted to the pre-amplifier by screwing the microphone in a clockwise
direction ensuring that the pre-amplifier spring pin is located centrally in the
microphone.
To remove the microphone, unscrew in an anti-clockwise direction.
The microphone has a protection grid which can also be unscrewed and removed, great
care must be taken to ensure that this is NOT removed. Underneath the protection
grid is the microphone diaphragm which should never be touched or be subject to dust
or dirt. Doing so may damage the microphone beyond repair or affect its acoustic
response dramatically.
Pre-Amplifier Removal & Fitting
To attach the pre-amplifier, position the RED orientation key on the pre-amplifier with
the RED identification mark on the dBAir sound level meter and gently push the pre-
amplifier into the connector.
To remove, gently pull the pre-amplifier stem away from the instrument body.
To prevent damage occurring to your dBAir sound level meter or your
Pre-Amplifier assembly never attempt to twist the pre-amplifier.

Microphone Extension Cable

To attach the microphone extension cable (purchased separately), position the RED
orientation key on the extension cable connector with the RED identification mark on
the dBAir sound level meter and gently push the extension cable into the connector.
To fit the pre-amplifier to the extension cable, see Pre-Amplifier Removal & Fitting
above.
To remove, gently pull the extension cable connector by pulling on the knurled part of
the stem.
7