Farnell TSV 70 - User Manual

A high performance power
supply with an output of
either 0-70V, 5A or 0-35V, 10A
Farmel
TSV 70 power supply
uENT
Publication PS 3
The TSV 70 laboratory bench power supply is a source of stabilised d.c. voltage
continuously variable over two ranges, 0 to 70 volts at 0 to 5 Amps or 0 to 35 volts
at 0 to 10 Amps, selected by a switch.
A switch isolates the output voltage which may be selected by coarse and fine
controls prior to connection to the load. Conversely the load may be disconnected by
the same switch without switching off the mains supply. Output voltage and current
are monitored independently by dual scale meters.
Remote sensing facilities are provided to ensure optimum performance when sup
plying distant loads. Overload protection is by adjustable constant current limiting.
The use of forced air cooling and the latest components and production techniques
has helped to reduce size and weight without resorting to switching techniques.
The specification is consequently very good and the unit does not generate radio
frequency interference.A rack mounting version, the TSV 70R, is available to special
order.

Summary

Farnell TSV 70 Power Supply

Product Overview

Introduces the Farnell TSV 70 as a high-performance, stabilised DC voltage power supply.

Instruction Manual

Product Identification

Identifies the manual for the Stabilised Voltage Supply Type TSV.70 MK. II.

Introduction

Supply Description

Details the TSV.70 Mk. II as a stabilised DC voltage supply with variable ranges and overload protection.

Operating Instructions

Mains Input Configuration

Instructions for setting the transformer tapping to match the mains input voltage.

Front Panel Controls

Explanation of the Input On/Off, Voltage Adjust, and Range controls on the front panel.

Meters and Indicators

Describes the output voltage and current meters and their automatic range selection.

Current Limit Adjustment

Guidance on setting the adjustable constant current limit for overload protection.

Circuit Description

Overall Supply Architecture

Describes the supply's mains transformer, rectifiers, capacitors, and series regulators.

35 V 10 A Range Circuitry

Details the circuit configuration for the 35V, 10A output range, including parallel systems.

Control Circuitry Function

Explains the role of the main control circuit board and its reference voltage generation.

Specification Summary

Mains Input and Variation

Specifies mains input voltages (210-240V, 105-120V) and tolerated variation (±10%).

Output Capability Range

Defines output as 0-70V at 0-5A or 0-35V at 0-10A, continuously variable.

Metering and Regulation

Covers voltmeter/ammeter ranges, line, and load regulation figures.

Ripple, Noise, and Temperature

Specifies ripple/noise limits, operating temperature range, and overload protection.

Physical Dimensions and Weight

Provides the unit's dimensions (width, depth, height) and weight.

Setting Up Procedure

Accessing Internal Components

Instructions for gaining access to circuitry by removing the rear panel and covers.

Voltage Range and Current Limit Setup

Step-by-step procedure to set voltage ranges and current limits using internal controls.

Meter Calibration

Procedure for calibrating the front panel voltmeter and ammeter to external references.

Performance and Applications

Series Operation

Guidelines for connecting units in series to achieve higher output voltages.

Parallel Operation

Instructions for connecting units in parallel to increase current capability.

External Sensing Operation

Details using sense terminals to correct for voltage drop in leads, with stability considerations.

Stability Factors

Load Change Effects

Details steady load change response and transient response to pulsed loads.

Mains Supply Influence

Explains how mains surges can affect output and suggests input filtering.

Temperature Variation Impact

Describes output variation caused by component value changes due to temperature.

Farnell TSV 70 Specifications

General

Brand	Farnell
Model	TSV 70
Category	Power Supply
Language	English