Kenwood PWR 18-2 User manual

©PRINTED IKPANB63-0028-Q0(T)
91/12111098765432190/1211109
REGULATED DC POWER SUPPLY
PWR18-2
PWR36-1
INSTRUCTION MANUAL
(Part ofPowerSupplyFunction)
KENWOODCORPORATION
KENWOOD

FCC WARNING:
This equipment may generate or use radio frequency energy. Changes or modifications to this equipment may cause
harmful interference unless the modifications are expressly approved in the instruction manual. The user could lose
the authority to operate this equipment if an unauthorized change or modification is made.
NOTE:
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residen-
tial installation. This equipment generates, uses and can radiate radio frequency energy and\ if not installed and used
in accordance with the instructions, may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference
to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged
to try to correct the interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.

CONTENTS
1. Outline4
2. Features4
3. Specifications5
4.PrecautionsforUse9
5. PanelExplanation11
5-1Frontpanel11
5- 2 Rear panel17
6.OperationProcedures..........................................18
Initialparametersforswitch-onof
powersupply18
Settingbyrotaryencoder18
6- 1 Usingasa positive(+ ) stabilized
powersupply...............................................19
6-2Usingasa negative{-)stabilized
powersupply19
6-3Trackingpowersupplyprocedures.................21
6-4 Preset procedures22
6-5 Output protect procedures.............................23
6-6Keylockprocedures.....................................25
6-7Rotaryencoderlockprocedures.....................25
7.Application........................................................26
Serial output 26
8.Maintenance27
8-1Removingthe case 27
8-2Changingthepowervoltage..........................27
8-3Replacingthefuse28
9.TroubleShooting29
10.ExternalDimensionsFigure..................................30
1. OUTLINE
The PWR series CV/CC powersupplyunitsarethefirstintheir
class with built-in microcomputers,makingtheirmulti-
functionalcapabilitiessecondtononeinthemarket.Theirdual
tracking function ishelpingthe series achievethehighestof
reliability.Moreover,thier multi-output isearningthema
several-fold leadoverconventionalsingle-outputpower sup-
plyunits,makingthePWR series mostidealfor research and
as papowersourceforvarious systems. ThePWR series is
also compatible with GP-IB, at time ofsystemconnection,
Master Control,andvariousotherremotecontrol.ThePWR
series fully satisfies thecurrentdemandfora powerfuland
multi-functional powersupply unit forautomaticmeasurement
systems andsimulation tests.
3
Guidelines onInstructionManualUsage
The PWR series instructionmanualcomesIntwo sets,
oneforthepowersupplyandtheotherforremote
control.
This Instructionmanualisfortheformer. Refer tothe
othermanualforremote control operation.

2. FEATURES
* Dualtrackingfunctionmode: Enables output voltageand
current(negativeandpositive)tobechangedatthe same
rate and same time.
* Seven-segment LED displayfunction (red): Enables voltage
and current digital values tobedisplayedatthe same time.
This functionallowsthe user to easily viewtheactual out-
putvoltageandcurrent levels andthe values previouslyset.
* Preset function:Allowsthe user topresetuptothreepairs
ofvoltageandcurrentmostfrequently used. This enables
thequicktargetselection.
*
Excellent man-machineinterface:One-touchkeyswitches
providedforsettingoperationalconditions.Allthevariables
can beentered through the"one-dialcontrol"oftherotary
encoder. Inaddition,thedesired output voltageandcurrent
values canbespecifiedpreciselyin10mVand10mA unit.
* Keylockfunction: Forces allthe values previouslysetto
be fixed. This preventsthecurrent values from beingaltered
bysomeone else whilethe user is "out".
* Protectfunction: Prevents unexpectedvoltageandcurrent
from being output toanexternalapplicationboard. This
functionishelpfulwhenthepresetkey,variablekey,and
trackingkeyarepressedinthe output operationmode.
* Safety mechanismdesign:Well-designedheatsinkprovid-
ed forpreventingintra-unittemperature from becominghigh
toomuch.Nofanisusedforcooling.Asa result,theinter-
nal functionalblocksarenotdegradeddueto noises, vibra-
tion anddust.
* Backupfunction:Allowsthe values previouslysettobekept
intheback-upmemory.Thatis,evenif theregulatedpower
supplies areturnedoff,thecurrent values are saved tothe
. back-upmemory. There isnoneedforthe user toenterdata
each timewhenthesystemisturnedon.
* Apart from thefeaturesdescribedsofar,thePWRhas
anotherspecialfeaturewhichisthecapabilitytocontrol
each functionbyremotecontrol.
Refer totheinstructionmanualforremotecontrolfordetails.

3. SPECIFICATIONS
PWR18-2
PWR
- OUTPUT VOLTAGE
Outputvoltage
0 to+ 18V/-18V
0 to+ 36V/-36V
Setting resolution
10 mV
Max. output voltage
+ 18V/-18V + 36V/-36V
Dual tracking
0 to± 18V 0 to± 36V
Tracking deviation
± (1%+ 40mV)ofratedvoltage
± (1%+ 80mV)ofratedvoltag
OUTPUT CURRENT
Outputcurrent
0 to+ 2A/ 0 to- 2A
0 to+ 1A/ 0 to- 1A
Setting resolution
10 mA
Max. output current
+ 2A/-2A
:- M - .
Dual tracking
0 to± 2A
0 to± 1A
Tracking deviation
(2% + 40mA)ofratedcurrent
CONSTANT VOLTAGE CHARACTERISTICS
Inputfluctuation(forsurgeofAC± 10%)
1 mV
2 mV
Load fluctuation
(forsurgeof0 to100%)
3 mV
2 mV
Ripple/noise rms(10Hzto1 MHz)
0.5 mVrms
5

PWR18-2 PWR36-1
Ripplepeak(p-p) 2.8mVp-p
Transient response
50 fis typical
Temperaturecoefficient
100 ppm/°Ctypical
CONSTANT CURRENT CHARACTERISTICS
Inputfluctuation (forsurgeofAC± 10%)
2 mAtypical
Load fluctuation
(forsurgeof0 to100%)
10 mAtypical
Rlpple/noiserms(10Hzto1 MHz)
2 mArmstypical
Ripplepeak(p-p) 5.6mAp-ptypical
Temperaturecoefficient
300 ppm/°Ctypical
VOLTMETER
Display (3-1/2 digit LED)
max. 19.99V,fixedrange
redLED
max. 19.99V/99.9V,autorange
redLED
Accuracy (output "ON")
(23°C± 5°C/ less than80%RH) ±(0.5%rdg+ 2
digit)
Low range:
±(0.5%rdg+ 4 digit)
Highrange:
±(0.5%rdg+ 1 digit)
AMPMETER
Display (3 digit LED)
max. 9.99A,fixedrangeredLED
±Accuracy (output "ON")
(1.0% rdg+ 2 digit) 23°C± 5°C, less than80%RH
6

PWR18-2 PWR36-1
FUNCTIONS
Output ON/OFF ON/OFF
switch.However, output cannotbeONwhenMEMORYON.
Red LEDlightsupwhenON.
Output protect ON/OFF
Disables the output ofunexpectedvoltageandcurrentinthe output
mode.This 'PROTECT' function becomesactivewhena different
value issetbyoneofthe PRESET, VARIABLE and TRACKING keys
inthe output mode.(ON-»RedLEDactive)
Preset (1,2,3)
3 voltagesorcurrentscanbepresetasdesired.Presetvaluescanbe
easily checked.GreenLEDlightsupwhenON.
Memory
Several voltageandcurrentpresetscanbestored.
Red LEDlightswhenON.
Key Lock
Locks allfunctionsasset.Allcontrolsexcept POWER aredisabled.
.RedLED.
V/A
Several voltagesandcurrentscanbeset.GreenLED.
Tracking andV/Adisplayselection ±18Vtracking,+18V,-18V ±36Vtracking,+36V,-36V
OUTPUT
COM
±18VCOMcommon ±36V common
Polarity
COM, positiveornegative ground possible
Output terminals
+ (red),- (white),COM(blue),GND(black)
Ground proof voltage ±250V DC
SERIAL OUTPUT
0to36V 0to72V
1

PWR18-2 PWR36-1
:
OPERATION CONDITIONS
Rated temperature/humidityrange
0 to40°C,10-85%RH'
Operationtemperature/humidityrange
0 to40°C,10-85%RH
Storage temperature/humidityrange
-20 to65°C,10-85%RH
Coolingmechanism' Naturalconvection
POWER CONSUMPTION
VA/W (atAC100V) approx.210VA/ 165W approx.190VA/ 145W
INPUT VOLTAGE
Voltage,Frequency
AC 100V ± 10%120V/ 220V/ 240V± 10%(max.250V)
50/60 HzInternalswitchingpossible.
DIMENSIONS AND WEIGHT / -
Dimensions
width:104mmheight:147mmdepth:330mm
Max. dimensions width:109mmheight:167mmdepth:350mm
Weight approx.6.4kg
Accessory items
1 instructionmanual1 powersupplycord2 fuses1 modulercable
•Circuitandratingsaresubjecttochange without noticeduetodevelopmentsintechnology.
8

4. PRECAUTIONS FORUSE
Keep inmindthe following whenreadingthismanual:
The manualcovers both thePWR18-2and PWR36-I
models.
However, from Chapter5,"Explanation,ofPanelfront"
onwards,, themanualis written onlyintermsofthe
PWR 18-2.
Whencheckingregardingthe PWR36-1, "18V"should
bechangedto"36V"whereveritappearsafter Chap-
ter5.
1)confirmingthesupplyvoltage
*Usethe unit within thespecifiedrange.
The unit'sratedvoltageissingle-phase,100/120/220/240
• V AC±10%(max.250V)at50/60Hz.
*Theratedvoltageis written onthenameplatelocatedun-
dertheAC input terminalontherearpanel.
*•.See-theMaintenanceandAdjustmentsection:'forinforma-
tion onhowtochangethesupplyvoltage.
2)connectionofpowercord
Be usertoplugtheprovidedpowercorddeeplyandfirmly into
theAC input terminal.
3)Precautionsforconnectionofoutputterminals
* Because thisisa dual output machinethatputsoutposi-
tive/negativevoltagesandcurrents,donotusetheprovid-
edshoringbarorotherdevicetoshorttheCMterminal with
thepositiveandnegativeterminals,orthepositiveand
negativeterminals with eachother.Ifa shortismade,use
themachineaftersettingthe output voltagetorathera low
level. Ifitishigh,theinternalcircuitsmaybedamaged. Keep
itinmind.
* This isa floating typepowersupply.Fornormaluse,the
providedshortingbartoconnecttheGNDandCOMtermi-
nals. Inaddition,whenconnectingtheshortbarbetween
theCOMandGNDterminals,orwhenremovingit,besure
toputthe OUTPUT switchto "OFF".
4)Set-upEnvironment
*Besuretousethemachine within thespecifiedambienttem-
peraturerangeof0 to40degC.
* Because the unit iscooledbynaturalconvection,donot
place objectsontop,placethe unit underanyheat-emitting
device, oruse multiple unitsinstackedconfiguration.Ad-
dition,placethe unit inaswellventilateda placeaspossible.
*Duringuse,theheatsinkintherearpanelmaygethot.En-
sure good ventilationanddonotplaceheat-susceptibleob-
jects nearby.
5)Remarksregardingturningonthepowersupply
*NodataisdisplayedonthedisplaypanelandtheLEDdis-
playremainsinactiveforaboutthreesecondsafterthis sys-
temisturnedon.Notethatthesystemisnotoperating
abnormally.Wait until somedataisdisplayedonthedis-
playpanel.
s

Inthe case ofnormalswitch-onwhenthebackupcondenser
is chargingthevoltageandcurrentsdisplayedwillallbe"0"
(See Figure1-a). Then, after5 seconds,normaloperation
willbegin.
Because the unit uses a condenserasthememorysetback-
uppowersupply,whenfirst turning thepowersupplyon,
orwhen turning itonforthefirsttimeina longtime(more
than1 week),allofthevoltagedisplaywillread"0"(See
Figure 1-a). This isnota malfunction,pleasedwait.While
themachineisinthisstate,allcontrolswitcheswillbenon-
functional.
Ifthesystemisturnedoffwhilethedata'0000'isdisplayed
onthedisplaypanel,thecontentofthebackupmemorymay
bedestroyed.Itmay cause anerror.Keepitinmind.Ifthe
system isturnedoffduetooperationalerrorsorsomeother
unavoidableerrors(forexample,powerfailure),performthe
operationsdiscussedinNote2 onpage18.Thesystemwill
beinitialized.
(Display dataoftheafterpowerissupplied)
Fig. 1
fivetotenseconds
(Initialdisplaydata)
*Thedisplaypanelofthe PWR36-1 indicatesthetwo values:
1.04A and0.10V.
10