HP Lab Series Instruction and safety manual

Errata
Title & Document Type:
Manual Part Number:
Revision Date:
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6209B Operating & Service
Manual
06209-90003
June 1969

•
I.
IT-llJH11J1·r·~ -
•
•
DC PowerSupply
Lab Series
Model6209B
---- ·-·--------·-·--

OTS LIBRARY
r

•
••
MANUAL
CHANGES
Model
6209B
DC
Power
Supply
Manual
HP
P/.N
06209-90003
5/2/89
Make
all
corrections in the
manual
according
to
errata
below,
then check the following table
tor
your
power
supply
serial
number
and
enter
any
listed
changes(s)
in
the
manual.
----------------------~----------
SERIAL
I
MAKE
I
I I
:----------------------:
CHANGES
: .
: Pref
ix I
Number
I
----------·-------------:---------:
All
I Errata
I
7F
1467-1606
I 1
I
7F
1607-1816
I 1,2
I
1147A
1817-1866
I 1,2,3
I
1147A
1867-2166
1-4
1147A
2167-2816
1-5
1147A
2817-3066
1-6
1527A
3067-3916
1-7
I
1721A
3917-4936
1-8
I
1930A
4937-5596
1-9
I
I
2042A
5597-6471
1-10
I
t
2230A
6472-6521
1-11
I
I
2239A
6552-6751
1-12
I
I
2323A
6752-6991
1-13
I
..
2403A
6992-7021
1-14
'
I
2409A
7022-7231
1-15
I
I 2"6A
7232-8521
I
1-16
I I
'
2446A
8522-8541
I
1-17
' I
2838A
8542-up
I
1-17
. I
-----~----------------------------
ERRATA:
In the replaceable
parts
table
make
the
fol-
lowing
change:
R38:
Change
from
"selected"
resistor
to
nominal
value
30
k,
_112
W,
A.B.,
HP
P/N_0686-3035.
On
page
3-5, delete the
bottom
halt
ot
Figure
3-9 (Auto-Series, Three Units).
Note
that
the supply should not
be
operated
at
more
than
300
volts
above
ground.
CHANGE
1:
In the replaceable
parts
table,
make
the
fol-
lowing change: Terminal
Strip:
Add,
HP
P/N
0360-0401.
ERRATA:
On_
the
title
page,
change
the
HP
PIN
of the
manual
to
06209-90003.
Page
5-8, paragraph
5-46, Step g:
Change
"66mVdc"
to
"3mVdc".
.Page
5-8, paragraph 5-48, Step
i:
Change
"66mVdc"
to
"3mVdc".
In
the replaceable
parts
list
change
CR26-29:
Change
to
HP
PIN
1901-0330.
Add
C26,
fxd
elect.,
20uf, +75-10j,
16VDC,
HP
PIN
0180-0300.
CHANGE
2:
In
the replaceable
parts
table,
change
power
transformer
T1
to
HP
P/N
5080-7183.
CHANGE
3:
The
Serial
Prefix ot
this
unit
has
been
changed
to
1147A.
This
is
the only
change.
CHANGE
4:
The
standard colors for
this
instrument are
now
mint gray
(for
front
panel)
and
olive
gray {for
all
other external surfaces).
Option
X95
designates use
of
the
former
color
scheme
of
light
gray
and
blue gray.
Option
A85
designates
use
or a
light
gray
·rront
panel with·olive gray
used
for
all
other ex-
ternal
surfaces.
New
part
numbers
are
shown
on
next page.
ERRATA:
Change
the
last
line
of
paragraph
5-28
to
read:
"which
is
100
mA."
Change
the
component
values
in
the contact protection
network
in
Figure
5-6
to
.001
uF
and
450
ohms.
In the parts
list,
change
HP
P/N
of rubber
bumper
(qty
4)
to
0403-0002.
In Table 1-1,
change
the
INTERNAL
IMPEDANCE
AS
A
CONSTANT
VOLTAGE
SOURCE
(Output
Impedance)
specification
to
read
as
follows:
Output
Impedance
specification
to read as
follows:
Mput
.
Impedance
(Typical) :
Approximated
by
a
20
milliohm resistance in
series
with a 1 microhenry inductance.
CHANGE
5:
Change
R49
to
30
k,
10
W,
HP
P/N
0811-1918.
CHANGE
6:
In
the parts
list
and
on
schematic diagram,
make
the following changes:
R14:
Change
to
6.8
ohms,
+/-5S,
112·
W,
0698-5525.
R15:
Change
to
150
k, '+/-SI, 2
W,
0764-0049.
NOTE:
Four
instruments
from
a previous run
have
CHANGE
6 incorporated.
The
serial
num-
bers are:
1147A-02793,
02795,
02796,
and
OZ797.
---
----~
r-CALL
CENTER
LIBRARY
I
111111
11111
11111 11111 11111
11111
11111
11111
11111
11111
Ill\
Ill\
2400013143

Model 6209B
Page
-2-
----------------------------------------------------~------~--------
I
I
DESCRIP.rIOlf
HP
PART
KO.
I
1-----------------------~-~-------------~---I
I I
STANDARD
I
OP!ION
A85
I
OPl'ION
X95
I
1------------------------1--------------1--------------1-------------1
I
Front
Panel
Lettered
I
o6209-60003 06209-60001
<---------
1
Heat
Sink
Rear
I
5020-8063
<---------
5020-5566
I
Chassis,
Right
Side
I
5060-7956
<---------
5060-6118
I
Chassis,
Left
Side
I
5060-7955
<---------
5060-6119
I
Cover,
Top
I
5000-9424
<---------
5000-6061
--------------------------------------------------------------------
OSCILLOSCOPE
Rt.
CONTACT
PROTECTION
NETWORK
(NOTE
J)
Rt
(NO'Tt
4)
NOTES:
-,
I
.
:f
I
: NC
I
.l
·I
I
I
I
I
REPE'TITIVE
I
I_!.~
_?'..[C.t!.
~OJ!:
.1)
.J
1.
THIS
DRAWING
SHOWS
A
SUOOES'IED
METHOD
OF
BUILDING
A
LQ.IJ)
SWITCH
HOWEVER.
OTHER
.
METHODS
COULD
BE
USEC
SUCH
AS
A
TRANSIS'TCIR
SWITCHING
NETWORK
•
MAXIMUM
L.<W>
RATINGS
Of"
LOAD
SWJTCH
ARE:
5
AMPS,
500\',
2SOW
(NOT~.
2.
USE
MERCURY RELAY .
CLARE
lYPE
HGP
1002
OR
W.E.
TYPE
27fill
3.
SEl.ECT CONTACT
PRO-
TECTION
NE'TWORK
ACCORDING TO MERCURY
R£1.AY
MANUFACTURERS
.
INSTRUCTIONS
4.
EACH
Rt
IS
EOUAL
TO
TWICE
THE
NORMAi.
FULL
LOAD
RESISTANCE
(iXRL)
USED
IN
PRE.VIO"S
TESTS.
CHANGE
T:
Change
the
Xransient
Recove1"1'
Time
specifica-
tion
Table
1-1
to
read:
"Less
than
50 u
sec
for
output
re~overy
to
within
10
mV
ot
nominal
output
voltage
following
a
load
change from
full.
load
to
half
load
(or
vice
versa.)."
Also
change
the
last
line
of
para-
graph
5.;28
to
read:
"which
'is
50 mA."
Figure
5-6
must
also
be
corrected
as
shown
on
next
page.
ERRATA:
The
front
panel
binding
posts
have
been
changed
to
a
type
with
better
designed
in-
sulation.
Delete
the
two
types
of
posts
list-
ed
on
page
6-8
of
the
parts
list
and
add:
·
black
binding
post,
BP
P/N 1510-0114
(qty·
2);
and
red
binding
post
HP
P
/N 1510-0115
(qty
l).
10
n-19
~+--+--_,.
(SlllQD)
12
-....~N
r9
Preregulator
Circuit,
part
of
Change 8
Change
the
part
number.of
pilot
light
DSl
to
1450-0566.
This
new
light
is
more
reliable
than
the
former
one.
The
blue-gray
meter
bezel
has
been
replaced
by
a
black
~ne,
HP
P/N 4040-0414.
Effective
January
1st,
1977,
Option
008 The:
corrugated
shipping
carton
for
this
model
(10-turn
kcurrent
control)
has
been'
redesig-
has
been
changed
to
HP
P/N 9211-2570.
Two
nated
Option
009.
Also,
Options
013
(decadial
9220~2703
floater
pads
are
used.
for
voltage
control)
and
014
{10-turn
current
•
•
control
with
decaidal)
are
no
longer
avail-
able
individually'
but
they
are
available
•
combined
into
a
single
new
option
designated
, :
Option
015.
Make
these
changes
wherever
Option
008,
013,
or
014
is
mentioned
in
the
manual..

'
(
·~·
llodel
6209B Page
-3-
CHARGE
8:
-The
preregul.&tor
circuit
has
been
revised
to
•
eliminate
turn-on
overshoot.
The
revised
por-
tion
ot
the
circuit
is
shown
in
the
next
column.
i'be
required
parts
list
changes
are
as
·follows:
(a)
Change R102
to
20
ohms, 5",
•
•
1/2
W,
HP
P/N
0686-2005; (b)
Add
R105,
100
"obms,
51,
1/2
W,
0686-1015;
(c)
Add
Rl06,
3
k,
5", 1
W,
0689-3025;
(d)
Add
C27,
0.01
uF,
800
V,
0160-
4569
; (
e)
Change
CR21
to
HP
P
/H
1901-0460;
(f)
Add
CR36,
HP
P/N
1901-0033.
ERRATA:
Tor
all
instruments
delivered
on
or
after
.July
1,
1978,
change
the
BP
P/N
for
fusehold-
er
from
1400-0084
to
fuseholder
body
'2110-0564 and
tusehdlder
carrier
2110-0565.
Change
the
BP
P/N
for
tuseholder
nut
from
2950-0038
to
2110-0569.
If
old
fUseholder
·
:must
be
replaced
for
any
reason,
replace
com-
:plete
fuseholder
and
nut
with
new
fuseholder
parts.
Do
not
replace
new
parts
with
old
:parts.
On
page 3-5,
Figure
3-9,
ground
(GND}
should
be
connected
to
the
minus
terminal
. (- ),
not
the
plus
(
+)
.
This
applies
to
both
two and
three
unit
diagrams•
CHANGE
9:
In
the
parts
list,
change
the
HP
P/N
for
the
binding
posts
and
associated
hardware
to
the
following:
Red
binding
post,
qty
2: 1510-0091
~erminal
lug,
qty
2:
0360-0042
Lockwasher,
qty
2:
2190-0056
Nut,
qty
2: 2500-0001
Black
binding
post,
qty
1:
1510-0107
Terminal
lug,
qty
1:
0360-1190
llut,
qty
3:
2950-0144
CHANGE
10:
In
the
replaceable
parts
list,
change
switch
Sl
to
HP
P/N
3101-2424.
On
the
Schematic
diagram
change
Sl
to
show two
switch
sec-
tions,
one
which
breaks
the
AC
Line
(as
shown),
the
other
breaks
the
ACC
Line.
CHANGE
11:
In
the
replaceable
parts
list
and
on
the
schematic,
change R16
to
var.
ww
20
k
ten-
turn
HP
P/N 2100-1867
qty
1.
Also
delete:
Xnob
BP
P/N 0370-0101
and
Knob
HP
P/N
0370-0179.
Add:
Knob
round
HP
P/N
0370-0137
.qty
1.
This
change
eliminates
Option
009
be-
-Cause
Option
009
is
now
standard
equipment.
CHANGE
12:
In
the
replaceable
parts
list,
change
R19
to
1
.M
ohm
1~,
1/8
W,
HP
P/N
0757-0344
and
VR2
to
6.2
V,
~'
HP
P/N
1902-0509.
CHANGE
13:
In
the
replaceable
parts
list,
page
6-5, un-
der
Ll,
add
inductor
L2,
0.6uh,
BP
P/N
9170-0894,
qtyl.
On
the
schematic
L2
is
added
between
the
emitter
lead
of
PNP
transistor
QlO
and
the
cathode
end
of
CR
32.
CHANGE
14:
In
the
replaceable
parts
list,
page
6-6,
change
R41
to
12.lK,
lJ,
1/8W
HP
P/N
0757-0444
and
R42
to
6.81K,
1~,
1/BW,
BP
P/W
0757-0439.
Also,
change
R41
and
R42
on
the
Schematic
Diagram,
Figure
7-2
to
the
new
values.
ERRATA:
In
the
replaceable
parts
list,page
6-8 change
Barrier
Strip
to
BP
P/N
0360-2185.
CHANGE
15:
In
the
replaceable
parts
list,
page
6-8, add
the
following
mechanical
assembly•
Barrier
Strip
Guard Assembly,
HP
P/H 5060-2862,
TQ
1.
CHANGE
16:
In
the
replaceable
parts
list·,
page
6-7
under
Miscellaneous
add
washer-flat,
non-metallic,
BP
P/'B
3050-0003,
'l'Q
1,
(ref.
T3).
This
washer
is
located
under
the
head
of
the
screw
attaching
T3
to
the
main
board.
ERRATA:
On
page
3-3
add
the
following
warning
to
paragraph
3-22.
WARNING
When
the
power
supply
is
remote
programmed
with
a
voltage
source,
the
programming
volt-
age
will
appear
at
the
output
terminals
when
the
AC
input
power
is
turned
off.
Therefore,
do
NOT
contact
the
output
terminals.
The'
front
panel
meters
will
not
indicate
the
presence
of
this
voltage.
ERRATA:
In
the
replaceable
parts
list,
page
6-7
change
VR3
to
voltage
suppresser,
VR=38.10V,
BV=42.3V
to
51.7V@
IT=lMA,
HP
P/N
0837-0289,
TQ
1.

Model
6209B
Page
-4-
· ·
CHANGE
17:
In the replaceable·
parts
list,
and
on
the
schematic,
add
resistor
R107
(10
Meg,
51,
CC,
HP
P/N
0686-1065).
R107
is
mechanically
in-
stalled
on
pins
in
the
location
of
C27,
and
electrically
is
parallel
to
C27.
(C27
is
removed
and
placed
on
the
pins
below
R107).
ERRATA:
In the replaceable
parts
list,
change
the
part
number
for
CR35
from
HP
P/N
1884-0302
to
HP
P/N
1884-0338
(qty
1).
•
•
•

•
•
•
DC
POWER
SUPPLY
LAB
SERIES
MODEL
62098
OPERATING AND SERVICE MANUAL
FOR
SERIAI.S
7Flll7
-
up*
*For
Serials
Above
7Flll7
Check
for
inclusion
of
change
page
.
*For
Serials
Be
low
7Fll
l 7
Ref
er
to
Appendix
A
100
Locust
Avenue,
Berkeley
Heights,
New
Jersey
07922
HP
Part
No.
06209-90003
Printed:
June.
1969

TABLE
OF
CONTENTS
Section
Page No.
I
GENERAL
INFORMATION •
1-1
Description
. . • •
1-1
1-1
1-1
1-1
1-1
II
III
1-·6
Specifications
1-8
Options
1-10
Accessories
1-12
Instrument
Identification
1-15
Ordering
Additional
Manuals
INSTALIATION • • • • • • • • •
2-1
Initial
Inspection
2-3
Mechanical
Check
2-5
Electrical
Check
2-7
Installation
2-9
Location
2-11
Outline
Diagram
2-13
Rack
Mounting
2-17
Input
Power
Requirements
2-19
Connections
for
230 Volt
Operation
2-21
Power
Cable
2-24
Repackaging
for
Shipment
1-2
1-2
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-3
2-3
2-3
2-3
OPERATING
INSTRUCTIONS
••••
3-1
3-1
Turn-On
Check-Out
Procedure·
3-1
3-3
Operating
Modes
3-l
3-5
Nonnal
Operating
Mode
3-1
3-7
Constant
Voltage
3-l
3-9
Constant
Current
3-2
3-11
Connecting
Load
3-2
3-14
Operation
Beyond
Normal
Rated
Output
3-16
Optional
Operating
Modes
3-17
Remote Programming,
Constant
Voltage
3-25
Remote Programming,
Constant
Current
3-31
Remote
Sensing
3-36
Series
Operation
3-41
Parallel
Operation
3-44
Auto-Tracking
Operation
3-47
Special
Operating
Con-
siderations
3-48
Pulse
Loading
3-50
Output
Capacitance
3-5
3
Reverse
Voltage
Loading
3-55
Reverse
Current
Loading
3-2
3-2
.3-2
3-3
3-3
3-4
3-5
3-6
3-6
3-6
3-7
3-7
3-7
IV
PRINCIPLES OF
OPERATION
• •
4-1
Overall
Block
Diagram
Discussion
4-1
4-1
11
Section
Page·No.
IV PRINCIPLES
OF
OPERATION
(Continued)
v
4-13
Detailed
Circuit
Analysis
4-2
4-14
Preregulator
and
Control
Circui~
4-2
4-20
Turn-On
Control
Circuit
4-4
4-24
Series
Regulator
4-4
4-26
Constant
Voltage
Com-
parator
Circuit
4-4
4-32
Constant
Current
Com-
parator
Circuit
4-5
4-37
Voltage Clamp
Circuit
4-5
4-40
Mixer
and
DriverAmplifiers
4-5
4-43
Reference
Circuit
4-5
4-46
Meter
Circuit
4-6
4-53
Additional
Protection
Features
4-7
MAINTENANCE
• • • • • • • • •
5-1
Introduction
5-3
Test
Equipment Required
5-5
Perfonnance
Test
5-7
Constant
Voltage
Tests
5-32
Output
Impedance
.
5-42
Constant
Current
Tests
5-51
Troubleshooting
5-57
Overall
Troubleshooting
Procedure
5-61
Regulating
Loop
Troubles
5-67
Repair
and
Replacement
5-69
Adjustment
and
Calibration
5-71
Meter
Zero
5-73
Voltmeter
Tracking
5-75
Ammeter Tracking
5-77
Constant
Voltage Program-
ming
Current
5-80
Constant
Current
Program-
ming
Current
5-83
Reference
Circuit
Adjust-
5-1
5-1
5-1
5-2
5-2
5-6
5-7
5-9
5-9
5-10
5-13
5-14
5-14
5-14
5-15
5-15
5-15
ments
5-15
5-85
Constant
Voltage
Tran-
sient
Response
5-16
5-87
Preregulator
Tracking
5-16
VI
REPIACEABLE
PARTS
• • •
6-I
6-1
Introduction
6-1
6-4
Ordering
Information
6-1
APPENDIX
A.
•
••••••
,
A-1
VII
CIRCUIT
DIAGRAMS
7-1
•
•
•

•
•
•
LIST
OF
TABLES
Specifications.
• • • • • • • • • •
Test
Equipment
Required • • • • • • • • •
Reference
Circuit
Troubleshooting
• •
Overall
Troubleshooting
• • • • • •
High
Output
Voltage
Troubleshooting
•
Low
Output
Voltage
Troubleshooting
• • •
Preregu
la
tor/Control
Circuit
'Troubleshooting
Page No.
.
l-3
•
5-1
•
5-10
••
5-ll
•
s-12
Table
1-1
5-1
5-2
5-3
5-4
5-5
5-6
5-7
5-B
6-1
6-2
6-3
6-4
Selected
Semiconductor
Characteristics.
• . • • • •
Checks
and
Adjustments
After
Replacement
of
Semiconductor
Devices.
•
Referenc'-1
Designators
• • •
•
5-12
.
S-13
•
5-13
.
5-14
•
6-1
Figure
2-1
2-2
2-3
2-4
3-1
3-2
3-3
3-4
3-5
3-6
3-7
3-B
3-9
3-10
3-11
3-12
4-1
4-2
Description
Abbreviations.
• •
Code
List
of
Manufacturers
• • •
Replaceable
Parts
• • • • • •
.
6-1
• .
6-2
•
6-5
LIST
OF
ILLUSTRATIONS
Page
No.
Outline
Diagram
• • • • • • •
2-1
Rack
Mounting,
Two
Units.
• •
2-2
Rack
Mounting,
One
Unit
•••••
2-2
Primary
Connections
• • • •
2-3
Front
Panel
Controls
and
Indicators.
3-1
Normal
Strapping
Pattern
• • • •
3-1
Remote
Resistance
Programming
(Constant
Voltage) • • • • •
3-2
Remote
Voltage
Programming
.
(Constant
Voltage) • • • • • • •
3-3
Remote
Resistance
Programming
(Constant
Current)
• • • • •
3-3
Remote
Voltage
Programming
(Constant
Current)
•
3-3
Remote
Sensing
• • • • • • •
3-4
Normal
Series
• • • • • • , , • •
3-4
Auto-Serles,
Two
and
Three
Units
•
3-5
Normal
Parallel
• • • • • • • • •
3-5
Auto-Parallel,
Two
and
Three
Units
•
3-6
Auto-Tracking,
Two
and
Three
Units.
3-6
Overall
Block Diagram • • • • • •
4-1
Operating
Locus
of
a
CV/CC
.
Power
Supply.
• • , • .
4-2
iii
Figure
4-3
4-4
4-5
4-6
5-1
s-z
5-3
5-4
5-5
5-6
5-7
5-8
S-9
5-10
5-11
Page No.
SCR
Phase
Control
OVer
DC
Input
Leve
1 • • • • •
4-3
Preregulator
Control
Circuit
Waveforms
·• • • • • .
4-3
Voltmeter
Connections,
Simplified
Schematic.
• • •
4-6
Ammeter
Connections,
Simplified
Schematic.
•
4-6
Differential
Voltmeter
Substitute,
Test
Setup
• , • • • • • • • •
5-2
Front
Panel
Terminal
Connections,
•
5-3
Load
Regulation,
Constant
Voltage •
5-3
Constant
Voltage
Ripple
and
Noise,
Test
Setup
• • • • . • •
5-4
CV
Noise
Spike,
Test
~'=!tup.
• • • .
5-5
Transient
Recovery
Time,
Test
Setup
•
5-6
Transient
Recovery
Time, Waveforms.
5-6
Output
Impedance,
Test
Setup
•
5-6
Output
Current
Measurement
Technique
• • • • • • • •5-B
Output
Current,
Test
Setup.
. .
5-8
CC
Ripple
and
Noise,
Test
Setup
• •
5-9

SAFETY SUMMARY
The
following generalsafety precautions
must
be observed during allphases
of
operation, service,
and
1epair
of
this instru-
ment.
Fsilu1e
to comply with these precautions
or
with
specific warnings elsewhere in this manual violates safety standards
of
design. manufacture, and intended use
of
the instrument. Hewlett-Packard Company assumes no liability for t.'le
customer's failure to comply
with
these requirements.
BEFORE
APPL
YING POWER.
Verify that the product
is
set
to
match the available line
voltage
and
the correct fuse
is
installed.
GROUND THE INSTRUMENT.
This product is a Safety
Class
1 instrument (provided
with
a
protective earth terminal!. To minimize shock hazard, the in-
strument chassis
and
cabinet must be connected
to
an
elec-
trical ground. The instrument must
be
connected
to
the
ac
power supply mains through a three-conductor power cable,
with the third wire firmly connected
to
an electrlcal ground
(safety ground! atthe power outlet. For instruments designed
to
be
harcf-wired
to
the
ac
power lines (supply mains), connect
the protective earth terminal to a protective conductor before
any other connection
is
made.
Any interruption
of
the protec-
tive (grounding) conductor or disconnection
of
the protective
earth terminal will
cause
a potential shock hazard that could
result
in
personal injury.
If
the
instrument~
to
be
energized via
an
external autotransformer for voltage reduction, be certain
that theautotransformer common terminal is connected
to
the
neutral (earthed pole)
of
the
ac
power
lines (supply mains).
INPUT POWER MUST
BE
SWITCH
CONNECTED.
For
instruments withoutabuilt-in line switch, the inputpower
lines must contain a switch or another adequate means for
disconnecting the instrument from the
ac
power lines (supply
mains).
DO NOT OPERATE
IN
AN
EXPLOSIVE
ATMOSPHERE.
Do
not operate the
instrum~nt
in
the
presence
of
flammable
gases
or fumes.
KEEP
AWAY
FROM LIVE CIRCUITS.
Operating personnel must not remove instrument covers.
Component replacement
and
internal adjustments must be
made
by qualified service personnel. Do not replace com-
ponents
with
power cable connected. Under certain condi-
tions, dangerousvoltages
may
exist even
with
the powercable
removed. To avoid injuries, always disconnect power,
discharge circuits and
remove
external voltage sources before
touching components.
DO NOT SERVICE
OR
ADJUST
ALONE.
Do
not attempt internal
service
or adjustment unless another
person, capable
of
rendering first aid and resuscitation,
is
present.
DO
NOT EXCEED
INPUT
RATINGS.
This
instrument may
be
equipped with a line filter to reduce
electromagnetic interference and must
be
connected to a pro-
perly
grounded receptacle
to
minimize electric shock hazard.
Operation
at
line voltages
or
frequencies in
excess
of those
stated on the data plate may cause
leakage
currents in excess
of 5.0
mA
peak.
SAFETY SYMBOLS.
Instruction
manual
symbol: the product
will
be marked with this symbol when
it
is
necessary
for
the user to refer
to
the
instruction manual (refer
to
Table
of
Contents).
Indicates hazardous voltages.
@ or
.J..
Indicate earth (ground) terminal.
IWARNING I
The
WARNING
sign
denotesahazard.
It
calls
attention to a procedure, practice,
or
the like, which,
if
not correctly per-
formed or
adhered
to,
could result in
personal injury.
Do
not
proceed
beyond
a WARNING sign until the indicated
conditions are fully understood
and
met.
The
CAUTION sign denotes a hazard.
It
calls
attention to an operating pro-
cedure, orthe like, which, ifnot correct-
ly
performed oradhered to, could result
in
damage
to
or destruction
of
part or all
of the product.
Do
not
proceed
beyond
aCAUTION sign until the indicated con-
ditions are fully understood
and
met.
DO
NOT SUBSTITUTE PARTS
OR
MODIFY INSTRUMENT.
Because
of the danger of introducing additional hazards,
do
not install substitute parts or perform any unauthorized
modification
to
the instrument. Return
the
instrument
t0
a
Hewlett-Packard
Sales
and Service Office for service and
repair
to
ensure
that safety features
are
maintained.
Instruments which appeardamaged
or
defective should
be
made
inoperative
and
securedagainstunintended operation
until
they
can
be repaired
by
qualified service personnel.
•
•

•
•
•
SECTION I
GENERAL INFORMATION
1-1 DESCRIPTION
1-2 This power supply (see cover) is completely
transistorized and suitable for either bench or rack
operation. It is a compact, well-regulated, Con-
stant Voltage/Constant Current supply that will fur-
nish full rated output voltage at the maximum rated
output current or can be continuously adjusted
throughout the output range. The front panel CUR-
RENT controls can be used to establish the output
current limit (overload or short circuit) when the
supply is used as a constant' voltage source and the
VOLTAGE control can be used to establish the volt-
age limit (ceiling) when the supply is used as a
constant current source. The supply will automati-
cally crossover from constant voltage to constant
current operation and vice versa if the output cur-
rent or voltage exceeds these preset limits.
1-3 The power supply has both front and rear ter-
minals. Either the positive or negative output ter-
minal may be grounded or the power supply can be
operated floating at up to a maximum of 300 Volts
off ground.
1-4 A single meter is used to measure either out-
put voltage or output current in one of two ranges.
The voltage or current ranges are selected by a
METER switch on the front panel.
1-5 Barrier strip terminals located at the rear of
the unit allow ease in adapting to the many opera-
tional capabilities of the power supply. Abrief
description of these capabilities is given below:
a. Remote Programming. The power supply
may be programmed from a
remote location by means
of an external voltage source or resistance.
b. Remote Sensing. The degradation in reg-
ulation which would occur at the load because of
the voltage drop in the load leads can be reduced
by using the power supply in the remote sensing
mode of operation.
c. Series and Auto-Series Operation. Power
supplies may be used in series when a higher out-
put voltage is required in the voltage mode of oper-
ation or when greater voltage compliance is required
in the constant current mode of operation. Auto-
Series operation pennits one knob control of the
total output voltage from a "master" supply.
d. Parallel and Auto-Parallel Operation. The
power supply may be operated in parallel with a
similar unit when greater output cuirent capability
is required. Auto-Parallel operation permits one
1-1
knob control of the total output current from a
"master" supply.
e. Auto-Tracking. The power supply may be
used as a "master" supply, having control over one
(or more) "slave" supplies that furnish various volt-
ages for a system.
1-6 SPECIFICATIONS
1-7 Detailed specifications for the power supply
are given in Table 1-1.
1-8 OPTIONS
1-9 Options are factory modifications of a stan-
dard instrument that are requested by the customer.
The following options are available for the instru-
ment covered by this manual. Where necessary, de-
tailed coverage of the options is included through-
out the manual.
Option No. Description
08 Current 10-Turn Pot: A single control
that replaces both coarse and fine cur-
rent controls and improves output set-
tability.
13 Three Digit Graduated Decadial Volt-
age Control: Control that replaces 10-
turn voltage control permitting accurate
resettability.
14 Three Digit Graduated Decadial Cur-
rent Control: Control that replaces
coarse and fine current controls permit-
ting accurate resetta bility.
28 230Vac Single Phase Input: Supply as
normally shipped is wired for llSVac
input.· Option 28 consists of reconnect-
ing the input transformer for 230Vac
operation.
1-10 ACCESSORIES
1-11 The accessories listed in the following chart
may be ordered with the power supply or separately
from your local Hewlett-Packard field sales office
(refer to list at rear of manual for addresses).
!@' Part No. Description
COS 8" Black Handle that can be attached
to side of supply.

i
Part
No.
14513A
14523A
Description
Rack
Kit for mounting one
3!"
high
supply.
(Refer
to
Section
II for
details.)
Rack.
Kit
for mounting
two
3t"
high
supplies.
(Refer
to
Section
II
for
de-
tails.)
1-12
INSTRUMENT
IDENTIFICATION
1-13
Hewlett-Packard
power
supplies
are
identified
by
a
three-part
serial
number
tag,
The
first
part
is
the
power
supply
model
number. The
second
part
is
the
serial
number prefiX.
which
consists
of
a
number-letter
combination
that
denotes
the
date
of
a
significant
design
change.
The number
designates
the
year.
and
the
letter
A
through
L
designates
the
month.
January
through
December,
respectively.
1-2
with
"I"
omitted.
The
third
part
is
the
power supply
s
ertal
number.
1-14
If
the
serial
number
prefix
on your power
sup-
•
ply
does
not
agree
with
the
prefJx on
the
title
page
of
this
manual.
change
sheets
are
included
to
up-
date
the
manual.
Where
applicable,
backdating
information
is
given
in
an
appendix
at
the
rear
of
the
manual.
1-15
ORDERING
ADDITIONAL
MANUALS
1-16
One manual
is
shipped
with
each
power
sup-
ply.
Additional
manuals
may
be
purchased
from
your
local
Hewlett-Packard
field
office
(see
list
at
rear
of
this
manual for
addresses).
Specify
the
model number.
serial
number prefix. and
~part
number
provided
on
the
title
page.
•
•

•
•
•
Table
1-1.
Specifications
INPUT:
llSVac
:1:10%
48-63Hz.
OUTPUT:
0-320
Volts
@
0.1
Amp,
LOAD
REGUIATION:
Constant
Voltage
-
Less
than
0,
02%
plus
2mV
for a full
load
to
no
load
change
in
output
cur-
rent.
Constant
Current
-
Less
than
200f.14
for
a
zero
to
maximum
change
in
output
voltage.
UNE
REGUIATION:
Constant
Voltage
-
Less
than
0.02%
plus
2mV
for
any
line
voltage
change
within
the
input
rating.
Constant
Current
-
Less
than
200µa
for
any
line
voltage
change
within
the
input
rating.
RIPPLE
AND
NOISE:
Constant
Voltage
-
Less
than
lmVrms/40mV
p-p.
Constant
Current
-
Less
than
200µArms.
OPERATING
TEMPERATURE
RANGES:
Operating:
O
to
sooc.
Storage:
-40
to
+1soc.
TEMPERATURE
COEFFICIENT:
Constant
Voltage -
Less
than
0.02%
plus
lmV
per
degree
Centigrade.
Constant
Current
-
less
than
0.02%
plus
lSOµA
per
degree
Centigrade.
STABIUTY:
Constant
Voltage
-
Less
than
0.10%
plus
SmV
total
drift for 8
hours
after
an
initial
warmup
time
of
30
minutes
at
constant
ambient,
constant
line
voltage,
and
constant
load.
Constant
Current
-
Less
than
0,10%
plus
750µ.A
total
drift
for
8
hours
after
an
initial
warmup
time
of
30
minutes
at
constant
ambient,
constant
line
voltage,
and
constant
load.
INTERNAL
IMPEDANCE
AS
A
CONSTANT
VOLTAGE
SOURCE: '
Less
than
0.02
ohm
from
de
to
lkHz.
Less
than
O.S
ohm from
lkHz
to
lOOkHz.
Less
than
3.0 ohms
from
lOOkHz
to
lMHz.
TRANSIENT
RECOVERY
TIME:
Less
than
SOµsec
for
output
recovery
to
within
lOmV
following
a
full
load
current
change
in the
output.
OVERLOAD
PROTECTION:
A
continuously
acting
constant
current
circuit
protects
the
power
supply
for
all
overloads
in-
1-3
eluding
a
direct
short
placed
across
the
termi-
nals
in
constant
voltage
operation.
The
con-
stant
voltage
circuit
limits
the
output
voltage
in
the
constant
current
mode
of
operation.
METER:
The
front
panel
meter
can
be
used
as
either
a
0-400
or
0-40
Volt
voltmeter
or
as
a
0-0.12
or
0.012
Amp
ammeter.
OUTPUT
CONTROLS:
Ten-tum
voltage
control
and
course
and
fine
current
controls.
OUTPUT
TERMINALS:
Three
"five-waya
output
posts
are
provided
on
the
front
panel
and
an
output
terminal
strip
is
located
on
the
rear
of
the
chassis.
All
power
supply
output
terminals
are
isolated
from
the
chassis
and
either
the
positive
or
negative
ter-
minal
may
be
connected
to
the
chassis
through
a
separate
ground
terminal
located
on
the
output
terminal
strip.
ERROR
SENSING:
Error
sensing
is
normally
accomplished
at
the
front
terminals
if
the
load
is
attached
to
the
front
or
at
the
rear
terminals
if
the
load
is
at-
tached
to
the
rear
terminals.
Also,
provision
is
included
on
the
rear
terminal
strip
for
remote
sensing.
REMOTE
RESISTANCE
PROGRAMMING:
Constant
Voltage -300.n/V. Accuracy: 1
%.
Constant
Current
-lSOKn/A. Accuracy: 10%.
REMOTE
VOLTAGE
PROGRAMMING:
Constant
Voltage -lV/V.
Accuracy:
1%.
Constant
Current
-
l.SV/.
lA. Accuracy: 10%.
COO
UNG:
Convection
cooling
is
employed.
The
supply
has
no
moving
parts.
SIZE:
3!"
H
x
12-5/8"
D
x
Si"
w.
Two
of
the
units
can
be
mounted
side
by
side
in
a
stand-
ard
19"
relay
rack.
WEIGHT:
13
lbs.
net.
18
lbs.
shipping,
FINISH:
Light
gray
front
panel
with
dark
gray
case.
POWER
CORD:
A
three-wire,
five-foot
power
cord
is
pro-
vided
with
each
unit.
..

SECTION
II
INSTALLATION
•
2-1
INITIAL
INSPECTION
2-2
Before shipment,
this
instrument
was
inspected
and
found
to
be
free
of
mechanical
and
electrical
defects.
As
soon
as
the
instrument
is
unpacked,
inspect
for
any
damage
that
may
have
occurred
in
transit.
Save
all
packing
materials
until
the
in-
spection
is
completed.
If damage
is
found,
file
a
claim
with
the
carrier
as
soon
as
possible.
Hewlett-Packard
Sales
and
Service
Office
should
be
notified.
2-3
MECHANICAL
CHECK
2-4
This
check
should
confirm
that
there
are
no
broken
knobs
or
connectors,
that
the
cabinet
and
panel
surfaces
are
free
of
dents
and
scratches,
and
that
the
meter
is
not
scratched
or
cracked.
2-5
ELECTRICAL
CHECK
2-6
The instrument
should
be
checked
against
its
electrical
specifications.
Section
V
includes
an
"in-cabinet"
performance
check
to
verify
proper
in-
strument
operation.
2-7
INSTALIATION
2-8
The instrument
is
shipped
ready
for
bench
operation.
It
is
necessary
only
to
connect
the
in-
strument
to
a
source
of
power
and
it
is
ready
for
operation.
2-9
LOCATION
2-10
This instrument
is
air
cooled.
Sufficient
space
should
be
allotted
so
that
a free flow
of
cool-
ing
air
can
reach
the
sides
and
rear
of
the
instru-
ment
when
it
is
in
operation.
It
should
be
used
in
an
area
where
the
ambient temperature
does
not
ex-
ceed
sooc.
2-11
OUTLINE
DIAGRAM
2-12
Figure
2-1
is
a diagram showing
the
outline
dimensions
of
this
unit.
2-13
RACK
MOUNTING
2-14
This
instrument
may be
rack
mounted
in
a
standard
19
inch
rack
panel
either
alongside
a
sim-
ilar
unit
or
by
itself.
Figures
2-2
and
2..;3
show
how
both
types
of
installations
are
accomplished.
2-1
TOP
1-----
,
\
Figure
2-1.
Outline
Diagram
2-15
To
mount
two
units
side-by-side,
proceed
as
follows:
a.
Remove
the
four
screws
from
the
front
panels
of
both
units.
b.
Slide
rack
mounting
ears
between
the
front
panel
arxi
case
of
each
unit.
c.
Slide
combining
strip
between
the
front
panels
and
cases
of
the
two
units.
d.
After
fastening
rear
portions of
units
to-
gether
using
the
bolt,
nut,
and
spacer,
replace
panel
screws.
2-16
To
mount a
single
unit
in
the
rack
panel,
pro-
ceed
as
follows:
a.
Bolt
rack
mounting ears, combining
straps,
and
angle
brackets
to
each
side
of
center
spacing
panels.
Angle
brackets
are
placed
behind combin- •
ing
straps
as
shown
in
Figure
2-3.
b.
Removefour
screws
from front panelof
unit.
·
~

•
••
•
g
D ..-1
................
~.
•c•i.rT'l'·-.C•M•
$
CJ
0
•nC•
C
....
C-"
.....
-
°''(j
6
--
~
"
"
0
~
$
I
I
r""''"""".......,
I
..
_
....
/
eJ
ti
;
$
c
-[o
-0
COMBINING
STRIP
RACK
EAR
_\
..
_
!G
19
-0 i
-0
Figure
2-2.
Rack
Mounting,
Two
Units
SPACING
PANEL
\
g)
0
CJ
MA
RI
~
DC
POWtA SUPPL
"f'
c
• • •
~HmETT·o
g)
0
METER
CURRENT
.-VOLTAllE-
YO\.TI
&!0$
COUSE:
fl'INE
g)
Q
O#F"8
~
+
C:Nll
-
fl
(J
Q
• • •
~
•
•
g)
Figure
2-3.
Rack
Mounting,
One
Unit
c.
Slide
combining
strips
between
front
panel
and
case
of
unit.
2-2
d.
Bolt
angle
brackets
to
front
sides
of
case
and
replace
front
panel
screws.

2·17
INPUT
POWER
REQUIREMENTS
2-18
This
power
supply
may be
operated
from
either
a nominal 115 Volt
or
230
Volt,
48.;.S3Hz
power
souree.
The
unit,
as
shipped from
the
fac-
tory,
is
wiri!d
for
11
S Volt
operation.
The input
power
required
when
operated
from
a 115 Volt,
60
Hertz
power
source
at
full
load
is
60
Watts
and
"l.O
Ampere.
TRANSFORMER
PRIMARY
CONNECTED
FOR
115VOLT
OPERATION
TRANSFORMER
PRIMARY
CONNECTED
FOR
no
VOLT
OPERATION
NOTE:
CONNECTIONS
BETWEEN
50
UI
,
54
a
55,
ARE
llADE
WITH
COPPER
ON
THE
PRINTEI>
CIRCUIT
BOARD.
THESE
CONNECTIONS
MUST BE
REMOVED
FOR
no
v
OPERATION.
THE
CONNECTIONS
ON
THE
PRINTED
CIRCUIT
BOARD
MUST
BE
BROKEN
AND
A
SEPARATE
EXTERNAL
CONNECTION
MADE
BETWEEN
POINTS
50
a
55.
Figure
2-4.
Primary
Connections
2-3
2-19
CONNECTIONS
FOR
230
VOLT
OPERATION
(Figure 2-4)
2-20
Normally,
the
two
primary windings
of
the
in-
put
transformer
are
connected
in
parallel
for
opera-
•
tion
from
llSV
source.
To
convert
the
power supply
to
operation
from a
230V
source,
the
power
trans-
former
windings
are
connected
in
series
as
follows:
a.
Unplug
the
line
cord
and
remove
top
and
bottom
covers
from
unit.
b.
Break
the
copper
between
54
and
55
and
also
between
50 and 51 on
the
printed
circuit
board.
These
are
shown
in
Figure
2-4
and are
labeled
on
copper
side
of
printed
circuit
board and
on
schematic.·
c.
Add
strap
between
SO
and
55.
d.
Replace
existing
fuse
with
1 Ampere,
230-
Volt
fuse.
Return
unit
to
case
and
operate normally.
2-21
POWER
CABLE
2-22
To
protect
operating
personnel,
the
National
Electrical
Manufacturers'
Association
(NEMA)
recom-
mends
that
the
instrument
panel
and
cabinet
be
grounded.
This
instrument
is
equipped
with
a
three
conductor
power
cable
•.
The
third
conductor
is
the
ground
conductor
and
when
the
cable
is
plugged into
an
appropriate
receptacle,
the
instrument
is
grounded.
The
offset
pin
on
the
power
cable
three-prong
oon-
nector
is
the
ground
connection.
2-23
To
preserve
the
protection
feature
when
oper-
ating
the
instrument
from a
two-contact
outlet,
use
a
three-prong
to
two-prong
adapter
and
connect
the
green
lead
on
the
adapter
to
ground.
2-24
REPACKAGING
FOR
SHIPMEN]'
2-25
To
insure
safe
shipment
of
the
instrument,
it
is
recommended
that
the
package
designed
for
the
instrument
be
used.
The
original
packaging material
is
reusable.
If
it
is
not
available,
~ont.act
your
local
Hewlett-Packard
field
office
to
obtain
the
materials.
This
office
will
also
furnish
the
address
of
the
near-
est
s~rvice
office
to
which
the
instrument
can
be
shipped.
Be
.!;µre
.to
atta~h
a:tag
to
the
instrument
which
specifies
the
owner, model number, full
serial
number,
and
service
required,
or
a
brief
description
of
the
trouble.
•
•

•
•
•
SECTION
Ill
OPERATING
INSTRUCTIONS
3-1
TURN.-ON
CHECK-OUT
PROCEDURE
Figure
3-1..
Front
Panel
Controls and Indicators
3-2
The
following
procedure
describes
the
use
of
the
front
panel
controls
and
indicators
and
ensures
that
the
supply
is
operational
(see Figure
3-1):
a.
Set
AC
Power
Switch
(i)to
ON.
b.
Observe
that
Pilo~9nf@
goes
on.
c.
Set
Meter
Switch
~to
desired
voltage
range.
d.
Adjust
coarse
and
fine
Voltage Controls
©until
desired
output
voltage
is
indicated
on
Meter.
e,
Short
circuit
output
tenninals,
set
meter
switch
to
desired
cuirent
range
and
adjust
Current
Controls
®for
desired
output
current. · ·
£.
Remove
short
and
connect
load
to
output
terminals
(Front
or
Rear).
3-3
OPERATING
MODES
3-4
The
power
supply
is
designed
so
that
its
mode
of
operation
can
be
selected
by making
strap-
ping
connections
between
particular
terminals on
the
terminal
strip
at
the
rear
of
the
power supply.
The
terminal
designations
are
stenciled
in
whiteon
the
power
supply
above
their
respective
terminals.
Although
the
strapping
patterns
illustrated
in
this
section
show
the
positive
tenninal
grounded,
the
operator
can
ground
either
terminal
or
operate
the
power
supply
up
to
300Vdc
off
ground (floating)
••
The
following
paragraphs
describe
the
procedures for
utilizing
the
various
operational
capabilities
of
the
3-1
power supply. A more
theoritical
description
con-
cerning
the
operational
features
of
this
supply
is
contained
in
Application
Note 90
and
in
various
Tech.
Letters.
Copies
of
these
can
be
obtained
from your
local
Hewlett-Packard
field
office.
3-5
NORMAL
OPERATING
MODE
3-6
The power
supply
is
normally
shipped
with
its
rear
terminal
strapping
connections
arranged for
Constant
Voltage/Constant
Current,
local
sensing,
local
programming,
single
unit
mode of operation.
This
strapping
pattern
is
illustraM!d
in
Figure
3-2.
The
operator
selects
either
a
constant
voltage or a
constant
current
output
using
the
front
panel
con-
trols
(local programming, no
strapping
changes
are
necessary).
MONITORING
POINTS
Figure
3-2.
Nonnal
Strapping Pattern
3-7
CONSTANT
VOLTAGE
3-8
To
select
a
constant
voltage
output, proceed
as
follows:
a.
Turn-on power
supply
and
adjust
VOLTAGE
controls
for
desired
output
voltage
(output
terminals
open).
b.
Short
output
terminals
and
adjust
CURRENT
controls
for maximum
output
current
allowable
(cur-
rent
limit),
as
determined
by
load
conditions.
If a
load
change
causes
the
current
limit
to
be
exceeded,
the
power
supply
will
automatically
crossover
to
constant
current
output
at
the
preset
current limit
and
the
output
voltage
will
drop proportionately.
In
setting
the
current
limit,
allowance
must
be
made
for
high
peak
current
which
can
cause
unwanted.
cross-over.
(Refer
to
Paragraph
3-48.)

3-9
CONSTANT CURRENT
3-10
To
select
a
constant
current
output,
proceed
as
follows:
a.
~hortoutput
terminals.andadjust
CURRENT
controls
for
desired
output
current~
·
b.
Open
output
terminals
and
adjust
VOLTAGE
controls
for
maximum
output
voltage
allowable
·
(voltage limit),
as
determined
by
load
conditions.
If
a
load
cbanqe
causes
the
voltage
limit
to
be
ex-
ceeded,
the
power
supply
will
automatically
cross-
over
to
ci>nstant
voltage
output
at
the
preset
volt-
age
limit
and
the
output
current
will
drop
propor-
tionately.
In
setting
the
voltage
limit,
allowance
must
be
made
for
high
peak
voltaqe.s
whlQh
can
ca!lse
unwanted
crossover,
(Refer tO
~aragra~h:3.~48
..
)
3-11
CONNECTING
I.DAD
3-12
Each
load
shoµld
be
connected
to
the
power
supply
output
terminals
using
separate
pairs
of
connecting
wires.
This
will minimize mutual
cou-
pling
effects
between
loads
and
will
retain
full
ad-
vantage
of
the
low
output
impedance
Of
the
power
aupply.
Each
pair
of
connecting
wires
should
be
as
short
as
possible
and
twisted
or
shielded
to
reduce
noise
pickup.
(If
shield
is
used,
connect
one
end
to
power
supply
gi-Ound
terminal
and
leave
the
other
end
unconnected.)
·
3-13
If
load
considerations
require
that
the
outp1,1t
power
distribution
terminals
be
remotely
located
from
the
power
supply,
then
the
power,
supply
output
terminals
should
be
connected
to
the
remote
distri-
bution
terminals
via
a
pair
of
twisted
or
shielded
wires
and
each
load
separately
connected
to
the
remote
distribution
terminals.
For
this
case,
remote
sensing
should
be
used
(Paragraph 3-31)·.
3-14
OPERATION
BEY'OND
NORMAL
RATED
OUTPUT
3-15
The.
shaded
area
on
the
front
panel
meter
face
indicates
the
amount
of
output
voltage
or
cur-
rent
that
is
available
in
excess
of
the
normal
rated
output.
Although
the
supply
can
be
operated
in
this
shaded
region
without
being
damaged,
it
can-
not
be
guaranteed
to
meet
all
of
its
performance
specifications.
Generally
when
operating
the
sup-
ply
in
this
manner,
the
output
is
unstable
when
a
load
is
connected.
However,
if
the
line
voltage
is
maintained
above
its
nominal
value,
the
supply
will
probably
operate
within
the
specifications
above
the
rated
output.
3-16
OPTIONAL
OPERATING
MODES
3-17
REMOTE PROGRAMMING, CONSTANT
VOLTAGE
3-18
The
constant
voltage
output
of
the
power
sup-
ply
can
be
programmed (contr.olled) from a
remote
location
if
required.
Either a
resistance
or
voltage·
3-2
source
can
be
used
for
the
programming
device.
The
Wires con,neCting
the
programming
terminals
of
the
supply
to
the
remote
programming
device
should
be
twisted
or
shielded
to
reduc·e
noise
pick-up.
T'1e
VOLTAGE
control
on.
the
front
panel
is
disabled
ac-
cording
to
the
following
procedures.
3-19
Resistance
Programming (Figure
3-3)
•.
In
this
mode,
the
output
voltage
will
vary
at
a
rate
deter-
mined
by
the
programming
coefficient-
300 ohms
per
Volt
(i.e.
the.
output
voltage
will
increase
l
Volt
for
each
300
ohms
added
in
series
with
programming
terminals).
The programming
accuracy
is
1%
of
the
.progra,mmed
value.
If
·greater
programming
accuracy
is
required,
it
may
be
-achieved
by
cha~ging
resis-
tor·Rl3
(see
Paragraph
5-79).
·
PROGRAMMING
RL
·
RESISTOR
Figure
3-3.
Remote
Resistance
Programming
(Constant
Voltage)
3-29
The
output
voltageof
the
power
supply
should
be
zero
Volts
::1:20
millivolts
when
zero
ohms
is
con-
nected
across
the
programming
terminals.
If
a
zero
ohm
voltage
closer
than
this
is
required.
it
may
be
achieved
by
changing
resistor
R6
or
RS
as
described
in
Paragraph
5-77.
3-21
To
maintain
the
stability
and
temperature
co-
efficient
of
the
power
supply,
use
programming
re-
sistors
that
have
stable,
low
noise,
and
low
temper-
ature
(less
than
30ppm
per
degree
centigrade)
char-
acteristics.
A
switch
can
be
used
in
conjunction
with
various
resistance
values
in
order
to
obtain
discrete
output
voltages.
The
switch
should
have
make-before-break
contacts
to
avoid
momentarily
opening
the
programming
terminals
during
the
switching
interval.
3-22
Voltage Programming (Figure
3-4).
Employ
the
strapping
pattern
shown
on
Figure
3-4
for
voltage
programming.
In
this
mode,
the
output
voltage
will
vary
in
a 1
to
1
ratio
with
the
programming
voltage
(reference
voltage)
and
the
load
on
the
programming
voltage
source
will
not
exceed
25
microamperes.
The
programming
accuracy
is
1%
of
the
programmed
voltage.
•
•
•

•
•
•••
Al
AZ
-
GNO
+
+S
AIO
00
Figure
3-4.
Remote
Voltage
Pregramming
(Constant
Voltage)
3-23
The
impedan~e
(Rx)
looking
into
the
external
programming
voltage
source
should
be
approximate-
ly
1000
ohms
if
the
temperature
and
stability
spec-
ifications
of
the
power
supply
are
to
be
maintained.
3-24
Methods
of
voltage
programming
with
gain
are
discussed
in
Application
Note
90,
Power Supply
Handbook:
available
at
no
charge
from
your
local
Hewlett-Packard
Sales
Office.
3-25
REMOTE
PROGRAMMING, CONSTANT
CURRENT
3-26
Either
a
resistance
or
a
voltage
source
can
be
used
to
control
the
constant
current
output
of
the
supply.
The
CURRENT
controls
on
the
front
panel
are
disabled
according
to
the
following
pro-
cedures.
3-27
Resistance
Programming (Figure
3-5).
In
this
mode,
the
output
current
varies
at
a
rate
determined
by
the
programming
coefficient
-75K ohms
per
Amp
for
Model 6207B,
and
lSOK
ohms
per
Amp
for
Model
62098.
The
programming
accuracy
is
10%
of
the
programmed
current.
If
greater
prc)gramming
accu-
racy
is
required,
lt
may
be
achieved
by
changing
resistor
Rl9
(see
Paragraph
5-82).
3-28
Use
stable,
low
noise,
low
temperature
coef-
PROGRAM
Ml
NG
RESISTOR
Figure
3-5.
Remote
Resistance
Programming
(Constant
Current)
3-3
ficient
(less
than
30ppm!°C)
programming
resistors
to
maintain
the
power
supply
t~ture
coefficient
and
stability
specifications.
A
switch
may
be
used
to
set
discrete
values
Of
output
CWTent. A
make-
before-break
type
of
switch
should
be
used
since
·
the
output
current
will
exceed
the
maximum
rating
of
the
power
supply
if
the
switch
contacts
open
during
t,.-
:;\~-!t-:::hing
interval.
------1CAUTI011tN-----
If
the
programming
terminals
(Al
and
A4)
should
apen
at
any
time
during
this
mode,
the
output
current
will
rise
to
a
value
that
may
damage
the
power
sup-
ply
and/or
the
load.
To
avoid
this
pos-
sibility,
connect
a lSK
resistor
across
the
programming
terminals
and
in
paral-
lel
with
a remote programming
resistor.
Like
the
programming
resistor,
the
lSK
resistor
shol.ild be
of
the
low
noise,
low
temperature
coefficient
type.
3-29
Voltage Programming (Figure
3-6).
In
this
mode,
the
output
current
will
vary
linearly
with
changes
in
the
programming
voltage.
The
program-
ming
voltage
should
not
exceed
1.8
Volts.
Voltage
in
excess
of
1~8
Volts
will
result
in
excessive
power
dissipa.tion
in
the
instrument.
and
·possible
damage.
Al
A2·A3
A4
AS
A6 A7
AB
A9
-S
-
GHO
+
+S
AIO
't::J'~'~'
REFERENCE
RL
VOLTAGE
Figure
3-6.
Remote
Voltage
Programming
(Constant Current)
3-30
The
output
current for Model 6207B
supplies
will
be
the
programming
voltage
divided
by
7.5 ohms.
For Model 6209B
supplies,
it
will
be
the
program-
ming
voltage
divided
by 15
ohms.
The
current
re-
quired
from
the
voltage
source
will
be
less
than
25
microamperes.
The
impedance
(Rx)
as
seen
looking
into
the
programming
voltage
source
should
be
ap-
proximately
500 ohms
if
the
temperature
coefficient
and
stability
specifications
of
the
power
supply
are
to
be
maintained.
The programming
accuracy
is
10%
of
the
programmed
current.
3-31
REMOTE
SENSING (See Figure
3-7)
3-32
Remote
sensing
is
used
to
maintain
good
reg-