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SECTION III
O p e r a t i n g I n s t r u c t i o n s
3 . 1
I n t r o d u c t i o n
T h i s s e c t i o n c o n t a i n s a d e s c r i p t i o n of t h e o p e r a t i n g c o n t r o l s and
t h e i r adjustment under normal o p e r a t i n g c o n d i t i o n s , and t y p i c a l c o n t r o l l e r
a p p l i c a t i o n s .
These i n s t r u c t i o n s are based upon t h e i n s t r u m e n t having been
i n s t a l l e d a s o u t l i n e d i n S e c t i o n II.
The d i o d e p o l a r i t y as shown i n F i g u r e
2 . 1 ( a ) i n p a r t i c u l a r must b e c o r r e c t .
ohm h e a t i n g element i s assumed t o t h e "Heater" t e r m i n a l s as shown i n F i g u r e
2 . 1 ( b ) .
3.2
C o n t r o l s , I n d i c a t o r s , Connectors
For t h e DRC-7C/70C i n s t r u m e n t , a 50
The o p e r a t i n g c o n t r o l s , i n d i c a t o r s and c o n n e c t o r s on t h e DRC-70 and
DRC-7C/70C i n s t r u m e n t ' s f r o n t and r e a r p a n e l s are shown i n F i g u r e s 3 . 1 , 3 . 2 ,
3 . 3 , and 3.4.
The numbers w i t h l e a d e r s t o v a r i o u s c o n t r o l s i n t h e f i g u r e s
are keyed t o t h e e n t r i e s i n T a b l e 3.1.
T a b l e 3 . 1
-
E n t r y Number C o r r e l a t i o n
NO. KEY
NAME
FUNCTION
1
NO LABEL
D i g i t a l . t e m p e r a t u r e d i s p l a y l o c a t e d behind
f i l t e r p a n e l .
2
NO LABEL
Ten p o s i t i o n s w i t c h , selects s e n s o r number
from one through t e n ( s e e S e c t i o n 1 . 5 ( I ) ) .
3
POWER
A.C.
l i n e s w i t c h (ON/OFF)
4
115/230 V
A.C.
l i n e v o l t a g e s e l e c t o r s l i d e s w i t c h
5
.25A S.B.
A.C.
l i n e f u s e (FUI)
6
NO LABEL
Sensor i n p u t c o n n e c t o r f o r s e n s o r s one
7
Remote
I/O
BCD o u t p u t of t e m p e r a t u r e ( o p t i o n a l )
8
NO LABEL
A.C.
l i n e cord
9
Monitor
Analog o u t p u t of s e n s o r v o l t a g e (0-2.5
V)
Maximum r a n g e
1-400
K.
50-60 Hz
t h r o u g h t e n .
o r o p t i o n a l l i n e a r a n a l o g o u t p u t of t e m p e r a t u r e
(0-4
V ) .
r e c o r d e r o r v o l t m e t e r .
S e e S e c t i o n 1 . 5 ( f ) .
Sensor i n p u t l e a d t e r m i n a l s ( P i n A , I+, P i n E ,
V+,
P i n B , I-, P i n D , V-,
P i n H , S h i e l d ) .
Should b e used w i t h h i g h i n p u t impedance
10
1 1
NO LABEL
Same as Key 1
1 2
NO LABEL
LED t o i n d i c a t e when power i s a p p l i e d t o
Sensor
h e a t e r l o a d .
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