Tesla BM 510, Instruction Manual

Page: 29 / 54

ÜDRZBA CASOVÉ ZÂKLADNY
MAINTENANCE OF TIME BASE
Nastaveni delky
Pfepinać funkci ĆZ (S102) dóme do polohy
„SYNCHR.“ ; pfepinać rychlosti (S101) do po­
lohy lms/dil; pfepinać vstupniho delice hori-
zontślniho zesilovaće (S302) do polohy „ĆZ“ ;
potenciometr R348 do polohy „KAL. Cz“.
Potenciometrem R345 v horizontćilnim zesilo-
vaći pak nastavime delku stopy na stinitku na
9 dilku.
Nastaveni rychlosti
Na vstup vertikalniho zesilovaće pfivedeme na-
pćti 1 kHz ± 0 ,5 % ze zdroje kalibraćniho na-
peti. Pfepinać rychlosti ćasove zdkladny S101
dame do polohy lms/dil; potenciometr R348
do polohy „KAL. CZ“ ; obrśzek na stinitku musi
byt zasynchronizovan. Potenciometrem R18 na-
stavime rychlost zakladny tak, aby osm pru-
bćbu obdelniku (1 ms) było pfesnć 8 dilku
rastru.
Pfi kontrole rychlosti v ostatnich rozsazich se
fidime udaji v tabulce.
P oloha pfepinaCe KalibraCni PoCet dilku
ry c h lo s ti k m ito će t ra s tru
S101 ± 0,5 % n a 1 prûbëh
100 ms/dil 10 Hz
1
50
ms/dil 10 Hz 2
20 ms/dil
10 Hz 5
10 ms/dil 100 Hz 1
5
ms/dil 100 Hz 2
2 ms/dil 100 Hz 5
1 ms/dil
1 kHz
1
0,5 ms/dil
1 kHz 2
0,2 ms/dil
1 kHz 5
0,1 ms/dil
10 kHz 1
50 ^s/dil
10 kHz 2
20
/u
s/dil
10 kHz 5
10 ¡ws/dil
100 kHz 1
5 ,us/dil
100 kHz 2
Nejv6tsi odchyłka v prfibćhu osmi dilku nesmi
byt vćtsi neź 6 mm.
Zkontrolujeme, zda pfi otoćeni potenciometru
R348 do polohy „KAL. X“ se zvysi rychlost ća-
sove zókladny nejmenć 3x.
UDRŻBA ZDROJU
V pfipadS nespravne funkce osciloskopu zkon­
trolujeme vsechna napdjeci napćti, ktera zdroje
skytaji, podle tabulky uvedene u schematu.
Transformator, filtraćni kondenzatory, usmer-
novaće i ostatni dily jsou snadno pfistupne a
tim i snadno vymgnitelne. Po eventudlni oprave
općt pfekontrolujeme vsechna napćti i velikost
zvlnćni na ss zdrojich osciloskopem.
Length Adjustment
Set the time-base mode switch (S102) to the
position “TRIG.“, the sweep-rate switch (S101)
to
the position “1 ms/div.“, the input
divider switch of the horizontal amplifier
(S302] to the position “T. B.“ and the potentio­
meter R348 to the position “T. B. CAL.“.
Using the potentiometer R345 in the horizontal
amplifier, set the image length on the screen
to 9 divisions.
Sweep Rate Setting
Apply a voltage with a frequency of 1 kHz ±
± 0.5 % from the calibrating voltage supply
to the input of the vertical amplifier. Set the
sweep-rate switch S101 to the position 1 ms/div.
and the potentiometer R348 to the position
“T. B. CAL.“. The image on the screen must bo
synchronized. Using the potentiometer R18 to
set the time-base sweep rate so that eight re c ­
tangular waves (1 ms) exactly coincide with
8 graticule divisions.
When checking the sweep rate in other ranges,
refer to the table below:
Position of C alib ratin g N um ber of
sw ce p -ra te -sw itch fre q u e n cy g ra ticu le -d iv isio n s
S 101 ± 0.5 % p er w ave
100 ms/div. 10 Hz 1
50 ms/div. 10 Hz 2
20 ms/div. 10 Hz 5
10 ms/div. 100 Hz 1
5
ms/div.
100 Hz
2
2 ms/div. 100 Hz 5
1 ms/div. 1 kHz 1
0.5 ms/div. 1 kHz 2
0.2 ms/div. 1 kHz 5
0.1 ms/div. 10 kHz 1
50
^/s/div. 10 kHz 2
20 ,us/div. 10 kHz 5
10 ,us/div. 100 kHz 1
5 ius/div. 100 kHz 2
The greatest deviation over the lenght of eight
divisions must not be more than 6 mm.
Check whether the sweep rate of the time
base increases at least three-times when chan­
ging the potentiometer R348 to the position
“X CAL.“.
MAINTENANCE OF POWER PACK
In the case of malfunction of the oscilloscope
check all the supply voltages provided by the
power pack in accordance with the table
attached to the circuit diagram. The transfor­
mer, the filter capacitors, the rectifier and
other parts are easily accessible and there are
no difficulties in their replacement. After any
repair use an oscilloscope to recheck all the
voltages and their ripple.
27