Kenwood VT-172, Инструкция по эксплуатации

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4. Please note t h a t t h i s unit O V E R L E V E L L E D
lights when the input exceeds 15dB above the
f u l l s c a l e reading f o r use w i t h weighting f i l t e r s to
w a r n a g a i n s t d i s t o r t i o n due to highly excessive
signal levels. It also n o r m a l l y lights when
switching between the 300V and 1V or between
the 300/iV and 1mV ranges, but t h i s is normal
and not an indication of excessive signal level.
5. The d y n a m i c range of the units is 4 0 ~ 8 0 d B
making it impossible to measure the internal
weighing f i l t e r ' s frequency response while they are
installed in the u n i t .
6. A signal or D C voltage should never be placed
between the instrument case and ground.
7. When t h i s instrument is used in a location where
the A C line has pulse noise of a level higher
than the interna] f i l t e r can handle, performance
m a y be affected. Ooitsideration sttould be given
to providing a clean power source in such a
s i t u a t i o n .
8. Temperature coefficient is 0.1%/°C T Y P . w i t h
1 0
A < V
~ 3 0 0
J « V
ranges.
7. M A I N T E N A N C E
;
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Removing the C A S E
Using a s c r e w d r i v e r , remove the t w o screw each on
the left side, right side and top of the instrument.
Open the bottom of the receptacle shaped case to
remove the cover.
R e m o v a l of the four screws retaining the bottom cover
w i l l expose the shield.
Replacing the fuse (see Figure 4)
R E P L A C I N G F U S E
When a fuse goes out, the device is no longer operable.
If gone out, check f o r a trouble cause, remedy it, remove
the cap of the fuse holder on the rear panel using a
screw d r i v e r and t a k e it out and replace the fuse w i t h
a new one.
When replacing fuse, be sure to check the c a p a c i t y of a
new fuse f o r a specified value as f o l l o w s :
A C
100V, 120V
: 0 . 5 A
A C 2 2 0 V , 240V : 0 . 3 A
- 1 2 -