RCA VoltOhmyst WV-77C, Specifications, Operation, Applications, Maintenance

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Specifications
Electrical
DC Voltmeter:
Ranges . 0 to 3, 12, 60, 300, 1 200 volt s
I n put R es i s t ance (Wi t h
Wit h W G ·299B s witch s et to " D C":
All Ranges .
11 m e g o hms
Accuracy:
W i t h Fu n ctio n Sele ct or . Set o n " + VO L TS"
±
3 % of f u ll s c a l e
W i t h Functi o n Selec t or Sct on ' I - VOL T S"
±
5% of f u ll scale
AC Voltmeter:
Ra ng es :
{ 0
to
3
v olts on
. ... . (). . . s e p arate scale
~ 0
t o
1 2 , 6 0, 300 ,
tAJP 120 0 volts
Acc ur acy . . . . . . . . .
-e . ..
± 5 % of full scale
Inpu t Res i s t ance and Ca p a c i t ance - Ap.p r ox .
(with WG - 299B sw itch s et t o "AC" ) : 0
3 , 1 2 , and 60 - V Ranges .. " O ,, 2 ~ ohm shun t ed b y 75
µµf
3aO-V Ra n g e 1 m e gohm s hunted by 5 0
µ µ£
1 2 0 0-V Rang e 2 m e gohms s hunted by 50
µµ£
F r e quency Re s pon s e (wi t h WG-299B s witch set to " AC " ) :
For Sou r ce Impedanc e of 100 Ohrrts# . . fl at within ± 1 db
from 30 cps to
3 Me
,
,
RMS V alues o f Sine Waves.
Fo r So u rc e Impedance of 1000 Ohm s# . . . flat within ± 1 db
from 30 cp s to
0 . 75 M e .
Wi t h Crystal-Diod e Pr ob e WG - 2M .&. . .. fl a t wi t hi n ± 1 d b
from 50 Kc . to
250 Me.
Maxi m um Inpu t Voltag e s :
C omb i n e d A C Peak Voltage and DC V olta ge :
Wh e n I n s trum e nt i s S e t u p to Me a su re DC . . 1 800 peak v olts
Wh e n Instr u ment is Se t up to Meas u re AC :
3- vo lt. 1 2 - volt, a nd 60- v olt r a nges . 400 de volts
300 - v olt and 1200-volt ran ge s . 600 d e volts·
Ohmmeter :
R ang es, fiv e . 0 t o 1000 m e g o hms
C e nt e r- S ca le Values
1 0, 1000, 10000 ohm s , 1.0 megohm, 1 0 me g o hms
Meter Movement:
DC Current f or Full·Sc a le Deflection.
200 µa
Tube C o mpleInent: .
Pow e r Supply:
V oltag e Rating .
Freque n c y Ratin g .
C onsumption .
. . _ . 1 R <ll\ -12 A LS , 1 RCA-1 2 A U 7
1 05 to 1 25 volts
50 to 6 0 c p s
5 watt s approx .
B attery:
1.5-volt cell . RCA T y pe VS036
Me c hanical
Ov e r - a ll
I ' lei g ht
W idth
Dep th
Weight.
Dimensions :
8 i n che s
5 % i nches
4% i nc h es
4 pounds
#Th e f r e qu e n c y respons e s h o w n i s f o r o nl y t h e .~. 1 2 . an d 6 0 - v o lt r ang e ~ .
T he i n ~ t n ll nent i s a c c urat e
at
pnw e r .lin e f re q uenci es f o r all ran ges .
AA v a ila b l e o n sepa rat e orde r.
*C om bin e d AC P ea k aud D C V o lta ge s mu s t n o t e x ceed 1 8 0 0 v o lt s .
Operation and Applications .... ...
<
Pre li min i ry Adjust m ents:
To pre p a r e tlie · \ VV - 77C
fo r
u s e ~ m ake the f o llo w ing
con n ect i ons a n d adj us t rn ents :
1. Connect t h e WG-299BDC / AC - Ohms Probe and
Cab l e to the VOLTS OHMS t e rm i n al.
2 . P lu g t h e power c or d i nto a n ac o utl et s u pp l y i ng
105 - 125 vo lt s a t 5 0 / 60 cycles, and ad ju st the con·
tr o I s as i nd i c a ted be l ow:
a . T u rn t h e fu n c t ion select o r t o
" +
VOLTS" .
position, a nd allow sev e ral minutes fo r the
ins trum ent to w ar m u p .
b _ Ad j ust the ZERO ADJ co nt rol to positio n the
m e ter poi n ter at the l eft - ha n d " 0" .
NOTE: To c heck this adjustment, noti c e w h e th er
or n ot the pos i t i on of the met e r pointer cha n ges
when the functio n s el e cto r is sw i tch e d to
" - VOLTS " . If the p oi n t er p o sit i o n c h a n g es,
readjust the m e c h anica l ze r o c on t r o l a s de-
scribed in th e Main t e na n ce Sec t i on.
c. T u rn t he fu n ct i on selecto r t o " OHMS" posi-
t i o n . The poi n te r s h ould de fl ect to a p pr oxi.
ma . tely f u ll s cal e.
d . Rotat e the OHMS ADJ co ntr ol t o pos ition the
po i nter a t t h e l ast line o n the "R" ( oh ms)
scale .
T h e i n st r um e n t i s now r eady f or u se .
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