Farnell L30A Скачать руководство пользователя страница 7 | Manualshive

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Содержание L30A

Страница 1: ...Farnell SUPPLY UNITS STABILISED VOLTAGE CURRENT L30 SERIES Issue 4 INSTRUCTION BOOK...

Страница 2: ...FARNELL INSTRUMENTS LIMITED SUPPLY UNITS STABILISED VOLTAGE CURRENT L30 SERIES Issue 4 FARNELL INSTRUMENTS LTD Sandbeck Way Wetherby Yorkshire LSZ2 4DH Telephone 0937 3541 3 6...

Страница 3: ...INTRODUCTION Page No I SECTION II OPERATING INSTRUCTIONS 2 SECTION III CIRCUIT DESCRIPTION 4 SECTION IV SPECIFICATION 6 SECTION V INTERNAL ADJUSTMENTS 8 SECTION VI TYPICAL PERFORMANCE 9 SECTION VII M...

Страница 4: ...means of two controls on the front panrl marked COARSE and FINE The o itput voltage or current is monitored by a switched voltmeter ammeter Overload protection is provided to protect the power unit an...

Страница 5: ...current is not to be exceeded then the setting up procedure is as follows With the mains supply connected to the unit mains and output switches to ON the meter switch set to CURRENT and the voltage c...

Страница 6: ...with a proportion of the output voltage derived from a resistive potential divider The mains supply is connected via fuse Fl SW1 and the input selector to MT1 The main secondary winding supplies a bri...

Страница 7: ...er diode Z2a Z9a and R10A feed a fraction of this voltage to VT3a base VT3a and VT4a are the comparator transistors the base of VT4a being fed from potential divider Pla R6a and R13a If the output vol...

Страница 8: ...s are set up before leaving the factory but in the event of future mis alignment the setting up procedure is as follows VOLTAGE ADJUSTMENTS 1 An accurate voltmeter is connected between the O P and O P...

Страница 9: ...ill cany the load until it current limits thereafter the unit having the next highest 10 voltage will supply the extra current until it limits and so on A typical output characteristic for a parallel...

Страница 10: ...II as a result of unit internal temperature change caused by changing internal dissipation from a change in load or supply to the unit I Ambient Change The typical temperature co efficient of output...

Страница 11: ...AM MAY BE USED IN THE EVENT OF SUPPLY DIFFICULT IES MAJOR CHANGES TO THE DESIGN OR MANUAL AKE LISTED BELOW In practice the voltage across Rs should not be less than 1 volt so that Rs should have a val...

Страница 12: ...1 3 o r r no T l 3 O rrr coo M r u M 171 u 1 3 M O O IE IJ A j n A J Lin 8 a m J1 S J m 1 i Kj I I L ore h 1 ft r L r L D O a o JTS LTD WETHERBY DRAWING No 3 szx aou r w...

Страница 13: ...KED DRAWN DIP C 2 l 73 ISS 2 3 7Z DATE ft n3 Qzobl at s z MOD No NOTt CAPACITOR VALUES GIVEN IN pF RESKTOIH VALUES IN II REFEIftS TO CCT BO PIN CONNECTION No VT MISC FARNELL INSTRUMENTS LTD WETHERBY Y...

Страница 14: ...i L DL 1 L TRACED CHECKED DRAWN B ISS 1 T3 2 I 7 3 ATl VT J o Ly H5 c o o O I o Q 2 20 i 1 r n i j J tO i ONt 2 Qua 02053 MOD No NOTE CAPACITOR VALUES GIVEN IN RESISTOR VALUES IN tl REFERS TO OCT BD...

Страница 15: ...FARNELL INSTRUMENTS LIMITED SANDBECKWAYWETHERBY YORKSHIRE LSZ2 4DH TELEPHONE 0937 3541...

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