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

5. PANEL EXPLANATION
5-1FrontPanel
*IllustrationisPWR18-T.8Q
©POWERON jm. I OFF _B_
This isthepowerswitch.Thepoweristurnedonwhenthis
switch is pressed. Thepoweristurnedoffwhenthisswitch
is pressedagain.
Nothing isdisplayedonthepanelforapproximatelythree
seconds afterthepoweristurnedon.
@ Voltmeter
This indicatesthepositive(+) andnegative(-)setting
values forthevoltageandthe output voltage.
The last-digital data may not be stable due to display
resolution. However, the output does not fluctuate.
*Ifa reversevoltageisgenerated0.00V isdisplayedand
thedisplay flashes.
@ Ammeter
This indicatesthe output currentvalueandthesettingvalue
ofthepositive(+) andnegative(-) output current.
®Rotary Encoder (voltage,current,delaysetknob)
This isrotaryencoder-typeknobforsettingthepositive/
negativevoltage,current limit, anddelaytime.The output
voltagevaluecanbesetorchangedwhenthe V.LED © is
lit,andthecurrent limit valuecanbesetorchangedwhen
the A.LED ©.Thedelayvaluecanbesetwhenthe
DELAY.LED islit.Therespectivevaluesincreaseastheknob
is turnedclockwise.
Fig. 2
11

©V-Key/ V-LED (Green)
This key sets the output voltagevalueandtheLEDlights
toindicatewhenthe output voltagevaluecanbeset.
Press thiskeytosetthe output voltagevalue.The V-LED
lightswhenthiskeyispressedandthe output voltage that
is indicatedonthevoltmeter@ canbevariedorsetbythe
rotaryencoder@.Whenthiskeyispressedagain,the
V-LED goesoffandthe output voltagevaluecannotbe
variedbytherotaryencoder@.
©A-Key/ A-LED (Green)
This key sets thecurrent limit valueandtheLEDindicates
whenthecurrent limit valueisset.The A-LED lightswhen
thiskeyispressedandthecurrent limit value that isindi-
catedonthevoltmeter@ canbevariedofsetbytherotary
encoder©.
Whenthiskeyispressedagain,the A-LED goesoffandthe
current limit valuecannotbevariedbytherotaryencoder©.
© DELAY Key/ DELAY LED(Green)
Press thiskeyto light the DELAY LEDandset with thero-
taryencoderthe ON/OFF time intervalsbetweentracking
output ([+ 1.8V/+1.8Afor PWR18-1.80; + 18V/+ 2Afor
PWR18-1T]) andother output (I+8V/+ 2Afor
PWR18-1.8Q; +6V/+5Afor PWR18-1T]).
Press thiskeyagaintoextinguishthe DELAY LEDso that
thedelay time cannotbealteredbytherotaryencoder.For
moredetailsseesection6-5inthechapteronoperation
procedures.
Fig. 3
12

®+ 18VKey/ OVERLOAD - LED (Green)=
This key sets the output voltageorthepositive(+)current
limit valueandtheLEDindicateswhenthissettingis
possible.
The positive(+) output voltageandcurrentvalueorthe set-
ting valuearedisplayedandthe+ 18VLEDlightswhenthis
key is pressed. •'•"
Press thiskeyandsetthevalue with therotaryencoder©
toset the.output voltageorthepositivef•+)current limit
value.
Ifthe output isoverloaded(Constantcurrentoperation),the
OVERLOAD (+18V)LEDflashestoindicatea malfunction
warning. \
The LEDgoesoffwhenthe+ 18Vkeyispressedagain.
®-18VKey/ OVERLOAD LED(Green)
This key sets the output voltageorthenegative(-)cur-
rent limit valueandtheLEDindicateswhenthissettingis
possible.
The negative output voltageandcurrentvalueorthe set-
ting valuearedisplayedandthe-18VLEDlightswhen
thiskeyis pressed.
Press thiskeyandsetthevalue with theV-Avaluesetting
knob@ toset output voltageorthenegative(-)current
limit value.
Ifthe output isoverloaded(Constantcurrentoperation),the
OVERLOAD (-18V)LEDflashestoindicatea malfunction
warning.
The LEDgoesoffwhenthe- 18Vkeyispressedagain.
©TRACKINGKey/ TRACKINGLED(Red)
This key sets the output (thepositiveandnegativevoltage
and currentvaluestothesamevalue)inthetrackingmode.
The LEDlightstoindicatethatthismodeisset.
When thiskeyis pressed, thesettingvaluesofthepositive
(+) andnegative(-) output voltageandcurrent limit are
set tothesameabsolutevalueandthe TRACKING LED
lights.
The currentlyindicatedvalue(selectedbyeitherthe+ 18V
key ® orthe- 18Vkey®)has priority forthetrackingvalue
and the output valuethatisnotdisplayedissettocor-
respondtothisvalue.
When thiskeyispressedagain,theLEDgoesoffandthe
trackingstatusiscanceled.Thesettingvalueremainsatthe
same valueaswhenthetrackingisperformedandisnot
reset totheoriginalvalue.
©+ 8VKey/ OVERLOAD LED(Green)
[This keyhasbeenaddedtothePWR18-1.8Qonly.]When
thiskeyispressedthe+ 8VLEDwill light upandthevalues
and/orsettingsfor+ 8V output voltageandelectricalcur-
rentlimitswillbedisplayed.
When youwant+ 8Vof output, press thiskeyandusethe
rotaryencodertosetthevaluesforthe output voltageand
electrical currentlimits.Ifan output overloadoccurs(at
constantcurrentoperation),the+ 8VLEDwillbegin
flashing.
@ -6VKey/ OVERLOAD LED(Green)
[This keyhasbeenaddedtothePWR18-1.8Qonly.]When
thiskeyispressedthe- 6VLEDwill light upandthevalues
13

*Illustrationis PWR18-1T
Fig. 4
and/orsettingsfor-6V output voltageandelectricalcur-
rentlimitswillbedisplayed.
When youwant- 6Vof output, press thiskeyandusethe
rotaryencodertosetthevaluesforthe output voltageand
electrical curentlimits.Ifan output overloadoccurs(atcons-
tantcurrentoperation),the- 6VLEDwillbeginflashing.
) + 6VKey/ OVERLOAD LED (Green)
[This keyhasbeenaddedtothe PWR18-1T only.]When
thiskeyispressedthe+ 6VLEDwill light upandthevalues
and/orsettingsfor+ 6V output voltageandelectricalcur-
rentlimitswillbedisplayed.
When youwant+ 6Vof output, press thiskeyandusethe
rotaryencodertosetthevaluesforthe output voltageand
electrical currentlimits.Ifan output overloadoccurs(at
constantcurrentoperation),the+6VLEDwillbegin
flashing.
) VARIABLE Key/VARIABLE LED(Green/Orange)
This keyispressedtochangethe output setting.Whenthe
key is pressed, theLEDlightsuptoindicatethatthemachine
is ina statewherethevoltagesettingcanbevaried.When
theLEDislit,thevoltagecanbechangedbyviatherotary
encoder knob.
This keyworksincoordinationwiththe PRESET key©.If
eitherthe MEMORY key© oroneofthe PRESET keys is
pressed, the VARIABLE LEDgoesoffandvariationofthe
voltage output becomesdisenabled.
This keycanalsobeusedtocontroltheadjustmentspeed
when changingthevoltageviatherotaryencoder.When
14

themachineisinthe VARIABLE modeandthegreenLED
• islitup,thevariationspeedissetto "SLOW". Ifthekey
is pressedoncemore,theorangeLEDlightsupandthevar-
iationspeedswitchesto "FAST". Ifthekeyispressedyet
again, thegreenLEDlightsagainandthevariationspeed
reverts to "SLOW".
© MEMORYKey/ MEMORYLED(Red)
The MEMORY functionisusedtostoretheprevious set-
ting values for output voltageandcurrentanddelaytime
thatarestoredinthe PRESET functionofthemain unit.
This keyandLEDareusedtosetandindicatetheprepara-
tion standbymodewhenthesetting values inthe PRESET
key @ arerecorded.
Ifthiskeyispressedwhenthe OUTPUT key© issetOFF,
the MEMORY LEDlightstoindicatethatthepresetopera-
tion canbeperformed.
The settingvalueisstoredfortheselectedkeynumberby
settingthevoltageandcurrentsettingvaluebytheV-key
®, A-key@ orrotaryencoder@ andthenselectingany
oneofthe PRESET keys (1, 2,and3).Ifthiskeyispressed
again the MEMORY LEDgoesofftoindicatethatthepreset
• statusis canceled.
The conditionthatwasdeterminedbythepreviousvalue
settingisrestoredifthiskeyispressedwhenthe MEMORY
LED lights(beforethe PRESET keyis selected).
Ifthiskeyispressedagainwhenthe MEMORY LEDislit,
thestoredvaluereturnstotheinitialsettingthatexistedbe-
forethekeywaspressedthefirsttime.Ifthe VARIABLE
key © ispressedwhilethe MEMORY LEDislit,the
VARIABLE LEDlightsupforabout3 seconds, the ADDRESS
NO. usedinthe REMOTE modeisdisplayedonthevoltmeter
© andammeter® displays.Fordetails,seeSections6 of
thismanual("OperationProcedure"),ortheseparateRe-
moteControlInstructionManual.
®PRESET (1,2,3)Key/ PRESET LED(1,2,3)(Green).
The output conditionsettingsarestoredina keybeforeoper-
ationandtheLEDlightsinthecorresponding keys whenthe
settings are read.
Three typesof output conditions within thestandardrange
can besetandstoredasdesired.
These keys havetwooperationsmethod.Ifthe PRESET 1
key is pressed, the PRESET 1 LEDlights.The following oper-
ations canbeperformed.
(1) Thesettingconditionscanbestored(onlywhen
MEMORY LED© lights).
(2) The output isperformedaccordingtothestored set-
tingsconditions,(withthe OUTPUT LED© on)
The operationandLEDfunctionarethe same for PRESET
2 and PRESET 3.
© OUTPUT Key/ OUTPUT LED(Red)
The OUTPUT LEDlightswhenthe OUTPUT keyispressed
and thepositiveandnegativevoltageandcurrentare out-
putsimultaneously.Thevoltmeterandammeterindicatethe
output values atthistime.Ifthe output keyispressedwhen
the OUTPUT LEDlights,the OUTPUT LEDgoesoffandthe
positiveandnegative output stopssimultaneously.
When thesystemispoweredon,the OUTPUT LEDdoesnot
light. Thatis,thesystemisinitializedtothe output OFF mode.
15

PWR18-1.8Q
PWR18-1T
Fig. 5
16

@ OUTPUT PROTECT Key/ OUTPUT PROTECT LED(Red)
This key sets the OUTPUT PROTECT functionONandOFF
and theLEDindicatesthefunctionstatus.
The OUTPUT PROTECT statusissetastheinitialsetting
forthepulsesurfaceandtheLEDlightswhenthepower
is firstapplied.
Ifthiskeyispressedwhenthe OUTPUT PROTECT function
is set,the OUTPUT PROTECT functioniscanceledandthe
OUTPUT PROTECT LED also goesoff.
The OUTPUT PROTECT functionshouldbesetandtheLED
should light duringnormaloperation.
Refer tothesection"OperatingProcedure"fora detailed
explanation ofthesettingprocedures.
© KEY LOCK Switch/ KEY LOCK LED(Red)
LOCAL Key/ LOCAL LED(Green/Orange)
This keyturnstheKEY LOCK settingONandOFFandthe
LED lightstoindicatethefunctionstatus.
The KEY LOCK LEDisOFFastheinitialdefaultsettingaf-
terthepowerisfirstapplied.TheLEDlightswhentheKEY
LOCK switchisturnedON.
When theKEY LOCK switchispressedagain,theLEDgoes
offtoindicatethattheKEY LOCK statusissetOFF.
When the KEY LOCK functionissetON,allotherkeyswitch
operations, exceptforpowerswitch,cannotbeperformed.
This LEDlightsupgreenwhenthemachineaddressisset
to"0",andlightsuporangeforanymachineaddressother
than"0" (REMOTE mode). Press thiskeytochangethe
machine from the REMOTE modetothe LOCAL mode.
Ifthiskeyispressedwhenthemachineisthe REMOTE
mode,theLEDgoesoffandthemachineswitchestothe
LOCAL mode.Rememberthatinthe REMOTE mode,oper-
ationofall keys otherthanthisoneareinoperable,andin-
put from therotaryencoderisnotaccepted. Fore details,
see Sections6 ofthismanual("OperationProcedure"),or
theseparateRemoteControlInstructionManual.
. TheONandOFFsettingforthisswitchisperformedby
pressing andinsulatedroundshaft2 to3 mmindiameter
intheroundholeinthe front panel.
® + 18VOutputTerminal
This terminalisusedto output + 18V/+1.8A([+18V/+1A
in PWR18-1T3) fortheCOM[COM 1 in PWR18-1T] terminal.
© - 18VOutputTerminal
This terminalisusedto output - 18V/-1.8A([-18V/-1A
in PWR18-1T]) fortheCOM[COM1in PWR18-1T] terminal.
© COMTerminal(AddedonlytoPWR18-1.8Q)
The commonterminalwhichisusedfor± 18V/±1.8A
output.
© COM1Terminal(AddedonlytoPWR18-1T)
The commonterminalwhichisusedfor± 18V/±1.8A
output.
@ GNDTerminal
This groundterminalisconnectedtothemain chassis. Dur-
ingnormaloperationaluseitshouldbeconnectingtothe
COM (COM1orCOM2in PWR18-1T) terminalviatheshort
bar.
® COM2Terminal(AddedtoPWR18-1Tonly)
The commonterminalwhichisusedfor+ 6V/+ 5A output.
17

5-2Rearpanel ®+ 8VOutputTerminal(Addedto PWR18-1.8Qonly)
This terminalisusedto output + 8V7+ 2AfortheCOM
Terminal.
@ -6VOutputTerminalfAddedtoPWR18-1.8Qonly)
This terminalisusedto output - 6V7-1AfortheCOM
Terminal.
@ +6VOutputTerminal(AddedtoPWR18-1Tonly)
This terminalisusedto output +6V/+ 5AfortheCOM2
Terminal.
(§)ShortBar
This barconnectstheCOMGNDterminals.
(30) PowerInputConnector
The ACcurrentisinputbythisconnector.Alwaysusethe
accessory powercordforconnectiontothisterminal.
©HeatSink
This isa radiatorforthetransistors.Becarefulnottotouch
itasitcanbeextremelyhotfromdissipatingtheheatfrom
thecomponents.
(32) RemoteConnector
The connectorusedforinputor output ofremotesignals
when themachineisusedwiththeremotecontrolmode.
Be suretousetheconnectingchordprovidedwiththe
machine. Fordetails,pleaseseeSection6 ("Operation
Procedure"), ortheseparateRemoteControlInstruction
Manual.
Fig. 6
18

6.OPERATION PROCEDURE
Makesurethatthepowersourceprovidestheratedvol-
tage,beforeconnectingthepowercord(attachedtothe
unit)tothepower input connecterwhichisinstalledon
thebackofthe unit.
Whenconnectinga load tothe output terminal,makesure
inadvancethatthe OUTPUT KEY©issetOFF(the OUT-
PUT LEDisnotlit).
Initialparametersuponthestart-upoftheunit
Fig. 7
The following aretheinitialsettingswhenthe unit ispowered
forthefirsttimeafterpurchase(orafterithasnotbeenused
fora longperiodoftime.)
1. + 18VLED® Lightsup
2. V LED© Lightsup
3. OUTPUT LED© Turnoff
4. VARIABLE LED@ Lightsup (Green)
5. OUTPUT PROTECT LED© Lightsup
6. Theinitialsettingsofthevoltmeter©,theammeter®,and
the PRESET KEYs (1,2,3) © are:
Display settingsforthe
positive(+) output
PWR 18-1T
PWR 18-1.8Q
Display settingsforthe
negative(-) output
PWR 18-1T
PWR 18-1.8Q
7. other output keys shouldbeinitialsettingasshownbelow
IS
PWR18-1.8Q: +8Vkey;2.06A/0.10V
-6Vkey;- 1.04A/0.10V
PWR18-1T : + 6Vkey;5.12A/0.10V

8. Initial DELAY Setting:
DELAY TIME: 0.00s
Note1
Afterthefirstuseofthe unit, thesettings from theprevious
operation(justbeforethepowershutoff)aredisplayed.Note
thatthe OUTPUT modeissettoOFFandthe OUTPUT PRO-
TECT modeissettoON.
Note 2
Upon turning onthepowerswitch,ifthe VARIABLE KEY®
is keptpressed until thedisplayedvalueofeachofthevolt-
meterandammeterbecomes"0000",thesettingsofthepanel
willreturntothesaidinitialsettings,andthedatastoredin
the PRESETKEYs becleared.
[Caution]: Ifthesystemisturnedoffwhilethedata'0000'
is displayedonthedisplaypannel.Thecontentofthebackup
memorymaybedestroyed,itmay cause anerror.Keepitin
mind.Ifthesystemisturnedoffduetooperationalerrorsor
some otherunavoidableerrors(forexample,powerfailure),per-
form theoperationsdiscussedinNote2 on.Thesystemwill
beinitialized.
SettingbytheRotaryEncoder
* Every setvaluecanbevariedbyusingtheV/Avalueset-
ting knoboftherotaryencodingsystem.Thesetvaluein-
creases iftheknobisturnedclockwise.Thesetvalue
decreases iftheknobisturnedcounterclockwise.
*WhenadjustingsettingsusingtheRotaryEncoder,the
amountbywhichthetargetparameterchangesperincre-
mentof rotation willvarydependingonhowquicklythe
knobisrotated.
1) Whenthe VARIABLE LEDislitupgreen ("SLOW" mode)
andtheRotaryEncoderknobisrotatedslowly,thevol-
tage,current,anddelaytimesettingswillchangeinincre-
mentsof10mV,10mA,and10ms,respectively,perclick
oftheknob.Iftheknobisturnedquickly,thesettings
willchangeinincrementsofabout2V,1.8A,and2s,
respectively (about2V, 1 A,and2s,respectively,forthe
18-1T model).
2) Whenthe VARIABLE LEDislituporange ("FAST" mode)
andtheRotaryEncoderknobisrotatedslowly,thevol-
tage,current,anddelaytimesettingswillchangebythe
same incrementsasforthe "SLOW" mode (i.e., 10mV,
10mA,10ms).However,iftheknobisturnedquicklyin
the "FAST" mode,thesettingswillchangeinincrements
ofaboutdoublethoseinthe "SLOW" mode(about4V,
3.6A,and4s,respectively).Beyondthese values, the
incrementswillincreasenofurthernomatterhowquickly
theknobisrotated.
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