Tektronix 494AP O o o A o o o o o o o, Connectingpower, PowerSourceand power Requirements

Installation- 494A/494ApServlce,Vol. 1

CONNECTINGPOWER

PowerSourceand power Requirements

Changing the powef input can be dangerous.

o Worksafely

o Knowthe intendedpowersource

oSet the instrument for the power source

o Checkthe fuse for properratings

. Use the power cord and plug intended for the powersource

The spectrum analyzer operates from a single_ phasepowersourcethat has one of its curent-carrying conductors(neutral)at ground(earth)potentiat.Oo-no-toperate the spectrum analyzer from power sources where both current-carryingconductorsare isolated or above ground potential(such as phase-to_phase

on a multi-phasesystemor across the legs ot a fiA-220y single-phase,three-wire system). tn tms method of operation, only the line conductor has over_current (fuse) protectionwithin the unit. Refer to the Safety summaryat the frontof this manual.

The ac power connectoris a three_wire,polarized plug with the ground(earth)lead connecteddirecflyto the instrumentframeto provideelectricalshockproiec- tion. lf th€ unitis connectedto anyotherpowersource, connectthe unitframeto an earthground-

Operatethe spectrumanalyzerfrom Either11SVac or 230 Vac nominalline voltagewith a rangeof 90 to 132or 180to 250Vac,at 4g to 440Hz. powerand vol_ tage requirementsare printed on a back_panelplate mountedbelowthe powerinputjack.

tnputpowerrequirementsare changedwitha switch on the backpanel(seeFigure3-1)and by replacingthe input line fuse. The instrumentuses a 4A fast blow fuse for 115Vac operation,anda 2A slow blowfuse for 230Vac operation.

Removethe protectivecover and set the line select switchfor the appropriatevoltagerange.

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WATTS([AXl 210

AMPS 3.2 AT 1'lsY 60 Hr FREO a! TO i'.oX!

FANGE

90-132 V

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CAUTION

	r POWERIEFORE NI
FIRE	FUItE
OilLY WITH	250Y aA :ASTFUSe.

Figure3-1. Inputpowerselectorswitchandfuse.

Removethe fuse holder and replacethe line fuse with the appropriatefuse for the voltagerangeselected.

The internationalpowercord and plug configuration is shownin the Optionssectionof this manual.

STORAGEAND REPACKAGING

Storage

Short Term (less than 90 days) - For short term storage, store the instrum€ntin an environmentthat meetsthe non-operatingenvironmentalspeciticationsin Section2 of this manual.

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