B&K Precision 2640 - Manual - Manual (Page 4)

4
Caution for safety
 Prohibiting to removal the cover
Do not remove the instrument cover to access the internal components. Only B&K
Precisions’ Service technician with knowledge of the instruments’ condition and
dangerous voltages can repair the instrument.
Instruments that appear damaged or defective should be made inoperative and secured
against unintended operation until they can be repaired by qualified service personnel.
 Keep the clean on power insert
Instrument’s power insert should remain dust free.
Clean the power insert regularly. Dust could result in damage to this instrument.
Continually clean the dust on input terminal of RF frequency counter.
Clean the input terminal regularly. Dust could result in damage to the instrument.
 RF in/output rating
Rating of RF input and output connector
Maximum DC voltage rating
RF input connector (socket): N type female, 50Ohms
Maximum RF input power: 5Vrms
Caution: Do not use over 5Vrms supplied and/or (-) power could result in damage to this
instrument
Do not operate this instrument if there is any doubt it is functioning properly: if
operating personnel feels the instrument is not operating properly, return this instrument
to B&K Precision for service and repair to ensure the safety features are maintained.