B&K Precision 1856D - Manual - Manual (Page 19)

19
WARNING
VOLTAGES WITHIN THIS INSTRUMENT ARE SUFFICIENTLY HIGH TO BE
LETHAL. COVERS MUST NOT BE REMOVED EXCEPT BY PERSONS
QUALIFIED AND AUTHORIZED TO DO SO, AND THESE PERSONS SHOULD
ALWAYS USE EXTREME CARE ONCE THE COVERS HAVE BEEN REMOVED.
4-1. Fuse Replacement
a. Disconnect and remove all connections from any live power source.
b. Unscrew the fuse holder with a screwdriver.
c. Remove the defective fuse.
d. Install a new fuse of the SAME SIZE AND RATING.
e. Screw the fuse holder back in.
CAUTION
REPLACEMENT FUSES MUST HAVE THE SAME SIZE AND RATING AS THOSE
BEING REPLACED.
4-2. Adjustment and Calibration
Regular adjustment and calibration of this instrument is recommended. The
procedures involved should be executed by qualified and authorized personnel only.
4-3. Cleaning and decontamination
The instrument can be cleaned with a soft clean cloth to remove any oil, grease
or grime. Never use liquid solvents or detergents. If the instrument gets wet for any
reason, dry it using low-pressure clean air at less than 25 PSI. Use care and caution
around the window cover areas where water could leak into the instrument while
drying.
5. OTHER
5-1. BNC Cable Considerations
The accuracy of radio frequency measurements can be affected by the
connections between the signal source and counter. The main issues involved are