Normal Trigger Mode - Philips pm2521 Operating Manual

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T I M E M E A S U R E M E N T S
Selection of the sensitivity ranges
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S e l e c t f u n c t i o n V -
w i t h t h e Í u n c t i o n s e l e c t o r .
-
s e l e c t t h e a u t o m a t i c r a n g i n g m o d e b y d e p r e s s i n g t h e A U T o / M A N *
p u s h b u t t o n .
R e m a r k :
Manual ranging is indicated with * on the display.
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C o n n e c t t h e v o l t a g e s o u r c e t o t h e 0 a n d V t e r m i n a l a n d m e a s u r e t h e i n p u t s i g n a l .
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M a k e a n o t e o f t h e s e l e c t e d r a n g e a n d p o l a r i t y . S l o w s i g n a l s m a y p a s s m o r e t h a n o n e r a n g e .
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S e l e c t f u n c t i o n t r i g g e r l e v e l w i t h t h e f u n c t i o n s e l e c t o r a n d s e l e c t o n e o f t h e n o t e d r a n g e s a n d p o l a r i t y .
R e m a r k :
Ranges
V-
Trigger level
200 mV
2 V
2 V
2 0 v
200 v
2000 v
2 0 v
200 v
2000 v
f nput signals that are lower than 7.5%oÍ the end of range value of the trigger level range cannot be triggered
accurately.
In the trigger level function only manual ranging is possible, with the pushbuttons UP or DOWN.
Selection of the trigger level
N O R M A L T R I G G E R M O D E
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S e l e c t t h e + o r - t r i g g e r l e v e l b y d e p r e s s i n g p u s h b u t t o n + / - .
R e m a r k :
S i g n a f s w h i c h a r e h i g h e r o r l o w e r t h a n c i r c u i t z e r o o Í t h e p M 2 5 2 1 ( O - t e r m i n a l ) c a n b e t r i g g e r e d w i t h t h e
+ or - trigger level respectively. In + trigger level mode, the PM 2521 triggers on positive crossings of the
trigger level. ln - trigger level mode the PM 2521 triggers on negative crossings of the trigger level.
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A d j u s t t h e t r i g g e r l e v e l w i t h t h e t h u m b w h e e l u n t i l t h e G A T E i n d i c a t i o n o n t h e d i s p l a y i s i g n i t e d .
R e m a r k :
The trigger level can be adjusted between zero and end of range.
The voltage reading on the display indicates the height of the trigger level.
l f t h e i n p u t s i g n a l c a n n o t b e t r i g g e r e d , p r o c e e d a s f o l l o w s :
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S e l e c t a n o t h e r t r i g g e r l e v e l p o l a r i t y b y d e p r e s s i n g p u s h b u t t o n + / - a n d t r y t o t r i g g e r a g a i n .
- C h e c k w h e t h e r t h e i n p u t s i g n a l i s l o w e r t h a n 7 . 5 " / o o Í t h e e n d o f r a n g e v a l u e o f t h e s e l e c t e d t r i g g e r l e v e l
r a n g e . S i g n a l s l o w e r t h a n 7 . 5 % c a n n o t b e t r i g g e r e d a c c u r a t e l y .
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S e l e c t a h i g h e r t r i g g e r l e v e l r a n g e b y d e p r e s s i n g p u s h b u t t o n U P a n d t r y t o t r i g g e r a g a i n .