Elenco Electronics XP-650 Скачать руководство пользователя страница 1 | Manualshive

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Elenco Electronics XP-650 Скачать руководство пользователя страница 1

VARIABLE REGULATED

POWER SUPPLY

MODELS XP-650 / XP-750

Instruction Manual

Elenco Electronics, Inc.

Copyright © 1989 Elenco Electronics, Inc. Revised 1998 REV-D 753650

Model XP-750

Model XP-650

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Содержание XP-650

Страница 1: ...VARIABLE REGULATED POWER SUPPLY MODELS XP 650 XP 750 Instruction Manual Elenco Electronics Inc Copyright 1989 Elenco Electronics Inc Revised 1998 REV D 753650 Model XP 750 Model XP 650 ...

Страница 2: ... Page 4 0 20V or 0 40V Regulators Page 4 XP 750 Digital Meters Page 5 Maintenance and Calibration Page 6 Variable 0 20VDC Regulator Calibration Page 6 Variable 0 40VDC Regulator Calibration Page 6 Digital Meter Calibration on Model XP 750 Page 6 Parts List XP 650 Page 7 Parts List XP 750 Page 8 Schematic Diagram XP 650 Page 9 Schematic Diagram XP 750 Page 10 ...

Страница 3: ...100mV The ammeter accuracy is better than 1 1 digit Resolution is 10mA 2 Safety Precautions CAUTION When removing cover or replacing fuse always disconnect the power cord from the AC socket Service repair should be done by qualified personnel who are knowledgeable of electrical haz ards Certain safety precautions must be observed when this power supply is used with external circuits that are conne...

Страница 4: ...om 0 to 40 volts Two current ranges are available 0 20V 3 amps and 0 40V 1 5 amps The units are precisely held to the desired output voltage by a special regulating circuit Maximum output current is externally adjustable from 05 to 3 amps An overload indicating lamps glows when current approaches limiting conditions This circuit is designed to protect the power supply against shorts or excessive d...

Страница 5: ...istors Q1 Q5 Q6 Q7 and resistors R10 and VR4 form a closed negative feedback loop If you analyze this loop you will find that the output voltage goes negative This reduces the current in transistor Q1 and thus the collector voltage will increase returning the output voltage to very near its original value The high gain is essential to keep the output voltage constant Diode D12 is added to prevent ...

Страница 6: ...tized data is presented to the display as four decoded digits seven segments plus polarity The decimal point position on the display is determined by a jumper wire on each meter PC board A D CONVERTER Any given measurement cycle performed by the A D converter can be divided into three consecutive time periods autozero AZ integrate INTEG and read A counter determines the length of the time periods ...

Страница 7: ...t to maximum position and voltage switch to 0 40V position 3 Adjust the variable resistor VR2 for 40 0V Digital Meter Calibration for Model XP 750 1 Note the small pot R2 on the top of each meter s PC board This is the GAIN pot which controls the accuracy of the meter 2 To set the accuracy of the meter you need another very accurate digital meter Connect this meter to measure the voltage on the ou...

Страница 8: ...Parts List XP 650 Qty Description Part Miscellaneous 2 Transformer 440400 1 PC Board 510650 1 Fuse 2A 530200 1 Switch Slide 541190 1 Switch Illuminated 541204 1 Voltmeter 40V 571040 1 Ampmeter 0 3A 573003 1 Cover 611071 1 Chassis 611650 1 Meter Bracket 613015 2 Heatsink 615001S 2 Knob 622009 1 Bushing Strain 624003 3 PC Board Stand off 625002 1 Binding Post Black 625031 1 Binding Post Red 625032 1...

Страница 9: ...320070 2 2N3055 323055 4 MPS 5172 325172 1 2N6121 326121 Integrated Circuits Parts List XP 750 Qty Description Part Miscellaneous 1 Display Amps 355614MA 1 Display Voltage 355614MV 2 Transformer 440400 1 PC Board 510650 1 Fuse 2A 530200 1 Switch Slide 541190 1 Switch Illuminated 541204 1 Cover 611071 1 Chassis 611750 1 Heatsink 615001S 1 Heatsink Clip on 615003 2 Knob 622009 1 Bushing Strain 62400...

Страница 10: ... 9 Schematic Diagram XP 650 160µF 330V 50V 50V ...

Страница 11: ... 10 Schematic Diagram XP 750 160µF 330V 50V 50V ...

Страница 12: ... of the warranty period a nominal service charge is required to cover shipping and handling Elenco will either repair or at its sole option replace any part except for fuses probes lamps batteries and other optional materials which are defective in either workmanship or material under normal and proper use When returning merchandise for repair please include proof of purchase a brief letter of exp...

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