HP 3484A Operating And Service Manual page 90

rA6T
~~~ ~N~;l~5~0~
- - - -
J6
~
IOM.n
-+<'
IL____ IOM.n
From A3 I
~
: I
Model 3484A
Section VII
-
---
--
-- -
-
---
-
- --- ---- --
- -
------ --
-,
+ IOV REF
___L/
o
~omPl2(34) -------..... 1 ~-------------------------------------------+-----.------<1----------------------+-------,
· Ri7
r'.Rlf': •
+30V
Kl
K2
I
ft
I
To INPUT - - ( ( ,--
AIK8
I
~
l '
I I I
I
"""T
I
-·-,
~
IKAOJ
+VR--...--.J
CR8
I
CRI
J6
I
I OOMV ( 100.n)
~
c (
1111
From A3
I
~
R2
~
K
RI _·1_,
+VR------,
CR9'
t
50
IOOKAOJ
R3
75
CR2
~
K4
IOOOKAOj
~
I
DRIVE~,
OOOMV~r+i: 1:. _j:~l~---t-~
IOOV ( IOOK.n)-+< 2 - -
~
DRIVE
1
From A3 '
I
CR5
IOV ( IOKSl)
l
I
DRIVE
---+<
B (
14 +
From A3
I
K5
.L..---=_1 _,
+VRCRlli
~ ~
I
I
K6
OHMS ENABLE
Rs< RIO
900K~
9000
Rl3
963
Rll
90.9K
100.n
ADJ
. ~
Rl5
100
Rl2
200
Rl4
49.9
Rl6
100
RIS
ISK
IOMO~
R21
2.87K
C5
.01t
IOMEG
ADJ
~
RELAY VOLTAGE
r.======'oRIVE CIRCU1rs=====~
+30V
R24
90K
TPI
E1N -+<10 I
To Pl2(33) I
I
r
-r ±
I
OHMS : t
DRIVE
r;::v
======-O~V~E::!:R~L~O~?R~~?lsECTION
J
I I
I
I
: I
CR6
TP3
+30V
~A
+30V
I
I
.l..CI
POWER :
~.OI
SUPPLY r t < s
GROUND~
:i
HIGH I
CURRENT
rt<
3
f-----i
GROUND
v
:1
v
LOW
1
CURRENT
r+<
of----,
GROUNOV
i
I
v
+ 5V - - + < H f - +5V
: I
-20V - t < E f - -20V
: I
,,CR7
9.09V
- - - - . - - - - + 2 1 V Z
+.LC2
~1.0
OSI
OHMS
~r~~Bk~ --..1.(
6 f - OHMS ENABLE L ____________ _
11152A-D-3034 ~
COPYRIGH! 1970 BY HEWLETT-PACKARD COMPANY
R31
200K
+30V
+30V
I
R33
28.7K
C3_
.01~
R34
6.34K
R35
20K
I
-20V
C4
i.01
TP2
OHMS ENABLE ' -
+5V
R36
18K
CRl7
J6
>+-
1
OHMS INPUT RELAY VOLTAGE
1
:
To JI (B), AIKI
- - - - - - - - - - - - - - - - - - - - + K
'---1__
OHMS INPUT RELAY DRIVE
I,--
To JI (C),AIKI , AIK8
OHMS DRIVE
To Kl, K6
-- ---------------.J
Figure 7-7. Schematic Diagram, Ohms Converter
Option 042.
7-13