Rion NL-42A, Instruction Manual, Page: 37 / 154

19
Preparations
Microphone extension cables (EC-04 series)
Be sure to turn power to the unit OFF before separating the microphone
from the main unit.
To reduce measurement deviations due to refraction effects and the acoustic
infl uence of the operator, the microphone can be detached from the unit and
connected via an extension cable. Available cables are listed in the table
below. Combining multiple cables is also possible.
Type Length Type Length
EC-04 2 m EC-04C 30 m (reel) + 5 m (connection cable)
EC-04A 5 m EC-04D 50 m (reel) + 5 m (connection cable)
EC-04B 10 m EC-04E 100 m (reel) + 5 m (connection cable)
Important
With long extension cables, the cable capacitance
restricts the upper measurement frequency and
measurement level. For details, refer to the
Technical Notes.
1. Loosen the preamplifi er fastening screw and remove the preamplifi er
from the main unit.
Important
Never separate the microphone and preamplifi er,
because this can lead to damage.
Before using the unit and before putting it away,
always check that the microphone and microphone
grid has not become loose. If this has happened,
refasten the microphone grid fi rmly and then use
or store the unit.
Never remove the microphone grid, because
this can lead to damage.
Microphone grid
Microphone
Preamplifier
Fastening screw
Sound level meter main unit