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Microphone preamp
Attaching the preamp
Sound Examiner SE-400 Series
28
Microphone preamp
The removable preamplifier (model SE-402R non-IS when equipped) can be used for remote distance
monitoring. An extension cable is connected between the SE-402R model and the preamplifier. (The cable
may be purchased separately, see Accessories in Appendix A).
Attaching the preamp
1. Place the preamp connector over the mating connector at the top of the instrument. Gently press
down while rotating the preamp until the preamp connector drops slightly in place.
2. Rotate the preamp ring until secure.
Connecting an extension cable
Optional Extension cables are available from 3M. They are typically used to make remote measurements by
distancing the microphone from the instruments body.
1. To connect the microphone to the extension cable, first remove the preamp from the SE-400 and
familiarize yourself with the extension cable ends.
Figure 4-17: Example of extension cable and preamp
2. Insert the extension cable’s pins (see B above) into the preamp, noting it will snap into place when the pins
are aligned correctly. Next, twist the black nut (on the preamp) counter-clockwise unit it fits securely.
3. Insert the opposite end of the extension cable to the top of the SE-400 and twist the silver ring until it is
fastened down.
Figure 4-18: SE-402R with extension cable and preamp attachment (when equipped)
Twist preamp locking ring Exte
Extension cable pins with white molding (see B)
connects to preamp
Extension cable with connector pins (see A) connects
to the top of the SE-400 .
Preamp pins (aligns to extension cable pins) see C.
A
B
C