BK Precision 5105B, Instruction Manual, Page: 7 / 48

7
Subject to change without notice
Type of fuse:
Size 5 x 20 mm; 250V~, C;
IEC 127, Bl. III; DIN 41 662
(or DIN 41 571, Bl. 3).
Cut off: slow blow (T) 0,8A.
Environmental conditions
Operating ambient temperature: 0 to + 40 degrees C. During
transport or storage the temperature may be –25 to +55
degrees C.
Please note that after exposure to such temperatures or in
case of condensation proper time must be allowed until the
instrument has reached the permissible range of 0 to + 40
degrees resp. until the condensation has evaporated before it
may be turned on! Ordinarily this will be the case after 2 hours.
The oscilloscope is destined for use in clean and dry
environments. Do not operate in dusty or chemically aggres-
sive atmosphere or if there is danger of explosion.
The operating position may be any, however, sufficient
ventilation must be ensured (convection cooling). Prolonged
operation requires the horizontal or inclined position.
STOP
Do not obstruct the ventilation holes!
Specifications are valid after a 20 minute warm-up period
between 15 and 30 degr. C. Specifications without tolerances
are average values.
Maintenance
It is necessary to check various important properties of the
oscilloscope regularly. Only this will ensure that all
measurements will be exact within the instrument’s
specifications.
Clean the outer shell using a dust brush in regular intervals.
Dirt can be removed from housing, handle, all metal and plastic
parts using a cloth moistened with water and 1 % detergent.
Greasy dirt may be removed with benzene (petroleum ether)
or alcohol, there after wipe the surfaces with a dry cloth. Plastic
parts should be treated with an antistatic solution destined
for such parts. No fluid may enter the instrument. Do not use
other cleansing agents as they may adversely affect the plastic
or lacquered surfaces.
Line voltage
The instrument has a wide range power supply from 105 to
253 V, 50 or 60 Hz ±10%. There is hence no line voltage selector.
The line fuse is accessible on the rear panel and part of the
line input connector. Prior to exchanging a fuse the line cord
must be pulled out. Exchange is only allowed if the fuse hol-
der is undamaged, it can be taken out using a screwdriver put
into the slot. The fuse can be pushed out of its holder and
exchanged.
The holder with the new fuse can then be pushed back in place
against the spring. It is prohibited to ”repair“ blown fuses or
to bridge the fuse. Any damages incurred by such measures
will void the warranty.
I m p o r t a n t h i n t s