Annexes
R&S
®
ZNB/ZNBT
1269
User Manual 1173.9163.02 ─ 38
Instrument damage caused by cleaning agents
Cleaning agents contain substances such as solvents (thinners, acetone, etc.), acids,
bases, or other substances. Solvents can damage the front panel labeling, plastic
parts, or screens, for example.
Never use cleaning agents to clean the outside of the instrument. Use a soft, dry, lint-
free dust cloth instead.
Risk of instrument damage due to obstructed fans
If the instrument is operated in dusty areas, the fans become obstructed by dust or
other particles over time. Check and clean the fans regularly to ensure that they always
operate properly. If the instrument is run with obstructed fans for a longer period, the
instrument overheats, which can disturb the operation and even cause damage.
1. Clean the outside of the instrument using a soft, dry, lint-free dust cloth.
2. Check and clean the fans regularly to ensure that they always operate properly.
3. Clean the touchscreen as follows:
a) Apply a small amount of standard screen cleaner to a soft cloth.
b) Wipe the screen gently with the moist, but not wet, cloth.
c) If necessary, remove any excess moisture with a dry, soft cloth.
10.3.2 Storing and Packing the Instrument
The vector network analyzer can be stored at the temperature range quoted in the data
sheet. When it is stored for a longer period of time the unit should be protected against
dust.
10.3.3 Replacing Fuses
The R&S
ZNBT is protected by a time lag fuse (T15L250V, stock no. 3589.7478.00).
The fuse is screwed in below the AC power switch on the rear panel.
For the R&S
ZNB each of the optional "Bias Tee" inputs at the rear panel (labeled
PORT BIAS <no>) is protected by a fuse (0.250 A, F IEC60127-2/2, stock no.
0020.7246.00).
Maintenance
