Allgemeines - Neuberger RPM 370 Bedienungsanweisung

M it d e m R ö h r e n m e ß g e r ä t R P M 3 7 0 /1 k ön n en a lle R u n d fu n k r ö h re n
und v ie le S p e z ia lr ö h r e n g e m e s s e n w e r d e n . D e r e in g e b a u te K r e u z ­
s c h ie n e n v e r t e ile r e r m ö g lic h t e s , d ie e in z e ln e n P rü fsp a n n u n g e n an
je d e n b e lie b ig e n P unkt d e s R ö h r e n s o c k e ls zu le g e n . D a d u rch i s t d as
G e r ä t in h ö c h s t e m M aße Z u k u n fts s ic h e r .
Im e in z e ln e n k ön n en 6 g r o b und fe in r e g e lb a r e Spannungen b e n u tz t
w e r d e n :
a) H eizsp a n n u n g v o n 0 -2 0 0 V o lt, ü b e r w a ch t d u r c h e in D r e h s p u l-
M e ß in s tr u m e n t (0 , 1 m A ) m it G l e ic h r ic h t e r . F ü r d ie G r o b s tu fe n
2 5 -2 0 0 V o lt kann d ie s e s In stru m e n t a u ch zu S tr o m m e s s u n g e n
b is 0 ,4 A m p . b z w . 0 ,2 A m p . in d en H e i z s t r o m k r e is e in g e s c h a l­
tet w e r d e n .
b ) 2 n e g a tiv e G itte r -G le ic h s p a n n u n g e n b is 100 V o lt , ü b e r w a c h t
d u r c h e in z w is c h e n d en b e id e n Spannungen u m s c h a lt b a r e s D r e h ­
s p u l-M e ß in s t r u m e n t (0 , 1 m A ).
c ) 2 p o s it iv e G itte r -G le ic h s p a n n u n g e n b is 500 V o lt , ü b e r w a c h t d u rch
e in z w is c h e n d en b e id e n Spannungen u m s c h a lt b a r e s D r e h s p u l- M e ß ­
in s tr u m e n t (0 , 1 m A ).
d) A n od en -G le ich sp a n n u n g b is 500 V o lt , ü b e r w a c h t d u r c h e in D r e h ­
s p u l-M e ß in s t r u m e n t (0 , 1 m A ).
S om it kann je d e R ö h r e m it s ta t is c h e n B e t r ie b s w e r t e n exak t g e ­
p rü ft w e r d e n . D ie V e rw e h d u n g v o n S p e z ia lp r ü ft a b e lle n e r ü b r ig t
s ic h , da d ie s ta tis c h e n B e t r ie b s w e r t e , so w ie d ie S o c k e l Schaltung
je d e r b e lie b ig e n h a n d e ls ü b lic h e n R ö h r e n ta b e lle e n tn o m m e n w e r ­
den k ön n en .
D ie V erw en d u n g v o n P r ä z is io n s s t u f e n s c h a lt e r n und P o t e n t io m e ­
t e r n ,s o w ie d ie r e ic h l ic h e D im e n s io n ie r u n g a lle r E in z e lt e ile g e ­
w ä h r le is te n o p tim a le B e t r ie b s s i c h e r h e i t . D as M e ß g e r ä t is t g e g e n
Ü b e rla stu n g w e itg e h e n d u n e m p fin d lic h . D u rch e n ts p r e c h e n d e
S ch a ltk o m b in a tio n e n in d e r Be re ic h u m Schaltung i s t au ch d ie Ü b e r ­
la stu n g d e r e in g e b a u te n M e ß in s tr u m e n te s o gut w ie a u s g e s c h lo s s e n .
D a s R P M 370 e r la u b t im e in z e ln e n fo lg e n d e P rü fu n g e n und M e s s u n g e n :
1. E le k tr o d e n s c h lu ß p r ü fu n g a ls V o r p r ü fu n g ;
S ch lu ß prü fu n g je d e r E le k tr o d e g e g e n je d e E le k t r o d e ;
S ch lu ß a n z e ig e e r f o l g t ü b e r e in h o c h w e r t ig e s O h m m e te r (H a u p tin s tr u -
m e n t), w e lc h e s M e s s u n g e n d e s I s o la tio n s z u s ta n d e s z w is c h e n d en
E le k tr o d e n b is 2 M e g o h m e r m ö g lic h t;;

ALLGEMEINES

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