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1.SetCurrentLimit(ILIM)potto0%forfullcurrentoutput(CCW).
CurrentLimitisforlimitingcurrentforloadsthathave
extremehottocoldresistanceratiosorareoverrated.We
recommendforthesetypesofloadstoadjustILIM(Cur-
rentLimit)to50%orless.Thiswillalsodecreasevoltage
aswellascurrent.0%CurrentLimitgives100%current
output(CCW).100%CurrentLimitgives10%current
output(CW).
2.SetManual(MAN)pottozerosounitwillnotbebiasedabove
input(CCW).
Manualcontroladjustmentprovidesameansofsetting
theoutputleveloftheMiniMaxPowerPakintheab-
sence of controlling instrumentation. The manual control
signalvalue“adds”tothecontrollinginstrumenttoset
minimum output. The desired output power level may be
setbyadjustingthemanualcontrol.Thisvalueofoutput
will then be present even in the absence of a control
signal.
3.SetRemoteManualpottozerooutputsounitwillnotbebiased
aboveinput(CCW).(Jumperpins4&5ifnotused.)
RemoteManualcontroladjustmentprovidesameans
ofsettingtheoutputleveloftheMiniMaxPowerPakin
the absence of controlling instrumentation. The Remote
Manual control is also effective when a control signal
is connected. The Remote Manual control signal value
“adds”tothecontrollinginstrumenttosetminimum
output. The desired output power level may be set by
adjustingtheRemoteManualcontrol.Thisvalueofout-
put will then be present even in the absence of a control
signal.ConnectRemoteManualpotwiretoPin4(CCW),
Pin5(W),andPin6(CW)ofplug-inconnector.
4.CheckforopencontactforEmergencyShutdown.
EmergencyShutdowninhibitsallSCRtriggerpulses
regardless of the level of the input signal or manual
potentiometer.ForEmergencyShutdown,closecontact
Pin7toPin8ofplug-inconnector.Leavecontactsopen
for operation.
5.Checkforpolarityofinputsignal.
6.Adjustinputsignaltolowendofscale.
ZeroAdjustcontrolsetsthepoweroutputstartingpoint
or reference. Thus, it effectively cancels positive inputs
totheMiniMaxPowerPak.
EXAMPLE: 0-5mAinputàsetto0mAinput
4-20mAinputàsetto4mAinput
7.Withpoweroff,connectlinevoltageandloadasshown.
8. Connect meter to input and output.
WARNING:Setmetertocorrectscaletoreadproperinput
or output.
9.Applypowertounit.
10.Adjustinputsignaltolowendofscale.
11.UsingtheZeropot,adjusttheoutputvoltagejusttozerovolts.
12.Adjustinputsignaltotopendofscale.
GainAdjustControlsetsthemaximumpoweroutputfor
maximum input signal.
EXAMPLE: 0-5mAinput:setto5mAinput
4-20mAinput:setto20mAinput
13.UsingtheGainpot,adjustoutputvoltagejusttomaximum
volts.
14.Repeatsteps11,12,13,and14untilnoadjustmentis
necessaryofZeroandGainpotsforproperoutputvoltage
indication.Voltageoutputshouldincreaseproportionallytothe
signal input applied.
15.Adjustinputsignaltolowendofscale(zerovoltageoutput).
16.WithManualpotatzeroforzerovoltageoutput,adjust(CW)
to100%forfullvoltageoutput.Voltageoutputshould
increaseproportionally.ReturntoCCWpositionandoutputwill
decreasetozerooutput.
17.WithRemoteManualatzeroforzerovoltageoutput,adjust
(CW)to100%forfullvoltageoutput.Voltageoutputshould
increaseproportionally.ReturntoCCWpositionandoutputwill
decreasetozerooutput.
18.WithManualpot(CW)at100%andILIM(CurrentLimit)at
0%,adjustILIMtowards100%notingthatvoltageoutput
decreaseswiththeadjustmentoftheCurrentLimitpot.Adjust
CurrentLimitpotforyourapplication,ifneeded.
19.TurnPOWEROFFandremovemeters.TESTCOMPLETE.
4.2.5 - Calibration (MiniMax 1P):
Manyhigh-temperatureheatingelementsexhibitextremehottocoldresistanceratios.HeatingelementscomposedofPlatinum,
Molybdenum, Tungsten, and Tantalum, to name a few, draw excessive current on start-up. Depending on the mass of the elements,
these“highstartingcurrents”mayexistforextendedperiodsoftime.Generally,oncetheelementshaveachievedtheirnormaloperat-
ingtemperatures,thecurrentdrawnthroughtheMiniMaxPowerPakwillfallwithintheratingoftheunit.Forthesetypesofloads,we
recommendadjustingtheILIM(CurrentLimit)to50%orless.Thiswilldecreasevoltageaswellascurrent.