Kenwood PWR 18-1T User manual

REGULATED DC POWER SUPPLY
PWR18-1T
PWR18-1.8Q
INSTRUCTION MANUAL
(Part ofPowerSupplyFunction)
KENWOODCORPORATION
©PRINTED INI ANB63-0030-00(T)
91/1211109 8 7 054 3 2190/1211109 8
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.
2

CONTENTS
1. Outline. 3
2* Features4
3. Specifications5
4. PrecautionsforUse9
5. PanelExplanation11
5-1Frontpanel11
5- 2 Rear panel18
6.OperationProcedure19
Initialparametersuponthestart-up
ofthe unit 19
Settingbytherotaryencoder20
6- 1 Usingasa positive{ + ) stabilized
powersupply21
6-2Usingasa negative{-)stabilized
powersupply22
6-3 Trackingpowersupplyprocedure...................23
6-4 Preset feature24
6-5 Delayprocedures25
6-6Outputprotectfeature..................................27
6-7Keylockfeature29
6-8Rotaryencoderlockprocedures.....................29
7. Applications30
Serial output 30
8. Maintenance......................................................32
8-1Removingthe case 32
8-2Changingthepowervoltage..........................32
8-3 Replacingthefuse33
9. TroubleShooting34
10. ExternalDimensionsFigure..................................35
1. OUTLINE
The PWR series CV/CC powersupplyunitsarethefirstintheir
class with built-in microcomputers,makingtheirmulti-functional
capabilities secondtononeinthemarket.Theirdualtracking
functionishelpingthe series achievethehighestofreliability.
Moreover,their multi-output isearningthema several-foldlead
over conventionalsingle-outputpowersupplyunits,makingthe
PWR series mostidealforresearchandasa powersourcefor
various systems. ThePWR series isalsocompatible with GP-IB,
attimeofsystemconnection,MasterControl,andvariousother
remotecontrol.ThePWR series fullysatisfiesthecurrentde-
mandfora powerfulandmulti-functionalpowersupply unit for
automaticmeasurementsystemsandsimulationtests.
Guidelines onInstructionManualUsage
The PWR series instructionmanualcomesintwo sets,
oneforthepowersupplyandtheotherforremote
control.
This instructionmanualisfortheformer. Refer tothe
othermanualforremotecontroloperation.
3

2. FEATURES
* Dualtrackingfunctionmode: Enables output voltageand
current(negativeandpositive)tobechangedatthe same
rate and same time.
* Seven-segmentLEDdisplayfunction (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.
* Delayfunction:Whenusinga large output powersource,
sudden damagecanoccurtotheloadwhen multiple out-
putsareturnedONorOFFsimultaneously.Topreventthis
damage, an output scheduledtocomeONwillbedelayed
fora specifiedamountoftime;i.e.theywillbetemporarily
left OFFduringthedelaytime.
* 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,eveniftheregulatedpow-
er suppliesareturnedoff,thecurrent values are saved to
theback-upmemory. There isnoneedforthe user toenter
data each timewhenthesystemisturnedon.
* Apart from thefeaturesdescribedsofar,thePWRhas
anotherspecialfeaturewhichisthecapabilitytocontrol
each functionbyremotecontrol.
Refer totheinstructionmanualforremotecontrolfordetails.
4

3. SPECIFICATIONS
Model
PWR18-1.8Q
PWR18-1T
OUTPUT VOLTAGE
Outputvoltage
0 to+18V/0to-18V
0 to+8V 0 to-6V
0 to+18V/0to-18V 0 to+6V
Setting resolution
10mV
Max. output voltage
+ 18V/-18V
+ 8.0V -6.0V
+ 18V/-18V + 6.0V
' Dualtracking
0 to±18V
0 to±18V
Tracking deviation
±(1%+40mV)
ofratedvoltage
±(1% + 40mV)
ofratedvoltage
OUTPUT CURRENT
Outputcurrent
0 to+1.8A/0to-1.8A
0 to+ 2A
0 to- 1A
0 to+ 1 A/0to- 1A
0 to+ 5A
Setting resolution
10mA
Max. output current
+ 1.8A/-1.8A
+ 2.OA
-1.0A
+ 1A/-1A
+ 5.OA
Dual tracking
0 to±1.8A
0 to!A
Tracking deviation
(2% +40mA)
ofratedcurrent
(2%+40mA)
. ofratedcurrent
CONSTANT VOLTAGE CHARACTERISTICS
Inputfluctuation
(forsurgeofAC±10%)
1mV 1mV 2mV
Load fluctuation
(forsurgeof0 to100%)
3mV 2mV 5mV
Ripple/noise rms(10Hzto1MHz)
0.5mV rms
0.5mV rms
5

Mode!
PWR18-1.8Q PWR18-1T
Ripplepeak(p-p) 2.8mVp-p 2.8mVp-p 5.6mVp-p
Transientresponse
BOfis Typical
BOfis Typical 100/>csTypical
Temperaturecoefficient 100ppm/°CTypical
CONSTANT CURRENT CHARACTERISTICS
Inputfluctuation
(forsurgeofAC±10%) 2mATypical 2mATypical 4mATypical
Load fluctuation
(forsurgeof0 to100%) •10mATypical 10mATypical 20mATypical
Ripple/noiserms(10Hzto1MHz) 2mArmsTypical 2mArmsTypical 5mArmsTypical
Ripplepeak(p-p) 5.6mAp-pTypical 5.6mAp-pTypical
10mAp-pTypical
Temperaturecoefficient 300ppm/°CTypical
VOLTMETER
Display(3-1/2 digit LED) max.19.99V,fixedrangeredLED
Accuracy (output "ON") ±(0.5%rdg+ 2
digit) (23°C±5°C, less than 80%RH)
AMPMETER•
Display(3 digit LED) max.9.99A,fixedrangeredLED
±Accuracy (output "ON")
(1.0% rdg+ 2 digit) 23°C±5°C, less than 80%RH
6

Model
PWR18-1.8Q
PWR18-1T
. 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 differentvalueissetbyoneofthe
PRESET, VARIABLE and TRACKING keysinthe output mode.(ON-»RedLEDactive)
Preset (1,2,3)
3 voltagesorcurrentscanbepresetasdesired.Presetvaluescanbeeasily
checked. GreenLEDlightsupwhenON.
Memory
Several voltageandcurrentpresetscanbestored.
Red LEDlightswhenON.
Key Lock
Locks allfunctionsasset.Allcontrolsexcept POWER aredisabled.
Red LED.
Delay
ON/OFF DELAY of± 18Vand+ 8V/-6V
output. GreenLEDlightsupwhenON.
ON/OFF DELAY of±18V
and+ 6V output.
Green LEDlightsupwhenON.
V/A
Several voltagesandcurrentscanbeset.GreenLED.
Tracking andV/Adisplayselection ±18Vtracking,+18V,-18V,+8V,-6V ±18Vtracking,+18V,
-18V, +6V
OUTPUT
'COM ±18V+ 8V,-6VCOMcommon ±18VCOMcommon,+6Vsingle
Polarity
COM, positiveornegative ground possible
Output terminals
+ (red),- (white),COM(blue),GND(black)
Ground proof voltage ±250VDC
7

Model
'VPWR1&1-.8Q PWR18-1T
SERIAL OUTPUT
0 to36V
0 to36V+0to6V
OPERATION CONDITIONS
Rated temperature/humidityrange 0 to40°C,10to85%RH
Operationtemperature/humidityrange
0 to40°C/10to85%RH
Storage temperature/humidityrange
-20 to65°C,10to85%RH
Coolingmechanism Naturalconvection
POWER CONSUMPTION
VA/W (atAC100V) approx.240VA/213W approx.21OVA/176W
INPUT VOLTAGE
Voltage,Frequency
AC 100V±10%120V/220V/240V±10%(max. 250V), 50/60Hz
Internalswitchingpossible.
DIMENSIONSANDWEIGHT. . . . - ••
Dimensions • . . width:138mmheight:147mmdepth:372mm
Max. dimensions width:143mmheight:167mmdepth:392mm
Weight approx.8.2kg
Accessory items
1 instructionmanual1 powersupplycord
2 fuses 1 modulercable(forremotecontrol)
•Circuitandratingsaresubjecttochange without noticeduetodevelopmentsintechnology.
8

4. PRECAUTIONS FORUSE
Please keepthefollowinginmindwhenreadingandus-
ingthisoperationmanual.
This manualwasoriginallyintendedtobe used foroper-
atingboththeFWR18-1TandPWRT8-1.8Q;'however,
theactualwritingofthemanualwasbasedmainlyon
the1.8Q. Even thoughmostoftheproceduresanddirec-
tions arethesameforbothmodels,therearepointsof
dissimilarity. These pointswillbesetoffbyparentheti-
cal [ 1 marksthroughoutthetext.
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.
*SeetheMaintenancesectionforinformationonhowto
change thesupplyvoltage.
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.
1

Inthe case ofnormalswitch-onwhenthebackupcondenser
is charging,thevoltageandcurrentsdisplayedwillallbe
"0" (SeeFigure1-a!. Then, after5 seconds,normalopera-
tion 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 onpage20.Thesystemwill
beinitialized.
(Display dataoftheafterpowerissupplied)
fivetotenseconds
(Initialdisplaydata)
*[TheabovediagramisforthePWR18-1.8Qonly.Thedis-
playedvalueforthe PWR18-1 Twillbe1.04A,0.10Vinthis
case.]
Fig. 1
to