BRUEL & KJAER 4292 Instructions And Applications page 10

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Fig.3.1. Instruments for vibration measurements with the 4292
instruments Type 2606,2607,2608,2113,2114,2010 and 3347 or
CONDENSER MICROPHONE on instruments Type 2603, 2107 or
INPUT on the instrument Type 2801), and the appropriate input
mode selected on the instrument concerned.