Aim TTi EX355R INSTRUCTION MANUAL [ml]

EX355R

Bench Power Supply

INSTRUCTION MANUAL

Table of Contents

Introduction 2 Specification 2 EMC 5 Safety 6 Installation 7 Connections 7 Operation 8 Maintenance 9

Instructions en Francais

Sécurité 10 Installation 11 Connexions 11 Fonctionnement 11 Maintenance 13

Bedienungsanleitung auf Deutsch

Sicherheit 14 Installation 15 Anschlüsse 15 Betrieb 16 Wartung 18

Istruzioni in Italiano

Sicurezza 19 Installazione 20 Collegamenti 20 Funzionamento 21 Manutenzione 23

Instrucciones en Español

Seguridad 24 Instalación 25 Conexiones 25 Operación 26 Mantenimiento 28

Voltage Range:

0V to 35V minimum

Current Range:

0A to 5A minimum

Output Voltage Setting:

By coarse and fine controls.

Output Current Setting:

By single logarithmic control.

Operating Mode:

Constant voltage or constant current with automatic cross-over.

Output Switch:

Electronic. Preset voltage and current displayed when off.

Output Terminals:

Universal 4mm safety binding posts on 19mm (0.75”) pitch.

for remote connection.

Reverse protection by diode clamp for reverse currents up to 3A.

Load Regulation:

<0.01% of maximum output for 90% load change, using remote sense.

Line Regulation:

<0.01% of maximum output for 10% line change.

(20MHz bandwidth):

Transient Response:

<200µs to within 50mV of set level for a 5% to 95% load change.

Temperature Coefficient:

Typically <100ppm/°C

Status Indication:

Output on lamp. Constant current mode lamp.

Introduction

The EX355R is an exceptionally compact and lightweight single output laboratory dc power supply providing 0 to 35V at 0 to 5A.

The EX355R uses mixed-mode regulation technology which combines switch-mode preregulation with linear post-regulation. Special techniques are used to maintain very high efficiency whilst achieving noise levels that are close to that of a pure linear regulator.

Excellent line and load regulation are matched by low noise and good transient response. High power efficiency ensures that the unit remains cool without any fan noise. High resolution controls allow accurate setting of voltage and current levels. Remote sense terminals are provided so that good regulation can be maintained across remote loads at high current.

The output operates in constant voltage or constant current mode with automatic cross-over and mode indication. There is a DC output on-off switch.

The EXR series incorporates separate digital voltage and current meters on each output. The meters use bright 14mm (0.56”) LED displays and have an update rate of 4 per second providing near instantaneous response. Simultaneous metering of voltage and current provides accurate information “at a glance” and avoids any possibility of misinterpretation. When the output switch is set to “off”, the current limit setting is displayed enabling conditions to be set before the load is connected.

The EXR series has been designed to meet the stringent requirements of the latest relevant IEC standards for safety and EMC, including harmonics emissions. All outputs are intrinsically short circuit proof, and are protected against external voltages and reverse currents.

OUTPUT

Sensing: Switchable between local and remote. Spring-loaded push terminals

Output Protection: Output will withstand up to 40V forward voltage.

Specification

Ripple & Noise

Typically <2mVrms, <10mV pk-pk, constant voltage mode.

Meter Types:

Dual 4 digit meters with 14mm (0.56") LEDs. Reading rate 4 Hz.

Meter Resolutions:

10mV, 1mA

Current 0.5% of reading ± 3digits

Installation Category II.

Power Consumption:

400VA max.

Operating Range:

+5ºC to +40ºC, 20% to 80% RH.

40ºC to + 70ºC.

Environmental:

Indoor use at altitudes up to 2000m, Pollution Degree 2.

Complies with EN61010−1.

EMC:

Complies with EN61326.

Size:

140 x 160 x 320mm (WxHxD).

METER SPECIFICATIONS

Meter Accuracies: Voltage 0.3% of reading ± 3digits,

GENERAL

AC Input: 220V-240V AC ± 10%, 50/60Hz.

110V-240V AC ± 10% by factory option.

Storage Range:

Safety:

Weight: 2.8kg

−

Performance levels achieved are detailed in the user manual.

EC Declaration of Conf ormity

We Thurlby Thandar Instruments Ltd

Glebe Road Huntingdon Cambridgeshire PE29 7DR England

declare that the

meets the intent of the EMC Directive 2004/108/EC and the Low Voltage Directive 2006/95/EC. Compliance was demonstrated by conformance to the following specifications which have been listed in the Official Journal of the European Communities.

EX355R Power Supply

EMC

Emissions: a) EN61326-1 (2013) Radiated, Class B

b) EN61326-1 (2013) Conducted, Class B c) EN61326-1 (2013) Harmonics, referring to EN61000-3-2 (2006)

Immunity: EN61326-1 (2013) Immunity Table 1, referring to:

a) EN61000-4-2 (2009) Electrostatic Discharge b) EN61000-4-3 (2006) Electromagnetic Field c) EN61000-4-11 (2004) Voltage Interrupt d) EN61000-4-4 (2012) Fast Transient e) EN61000-4-5 (2006) Surge f) EN61000-4-6 (2009) Conducted RF

Safety EN61010-1 Installation Category II, Pollution Degree 2.

CHRIS WILDING TECHNICAL DIRECTOR

10 September 2015

This instrument has been designed to meet the requirements of the EMC Directive 2004/108/EC. Compliance was demonstrated by meeting the test limits of the following standards:

Emissions

EN61326-1 (2013) EMC product standard for Electrical Equipment for Measurement, Control and Laboratory Use. Test limits used were:

a) Radiated: Class B b) Conducted: Class B c) Harmonics: EN61000-3-2 (2006) Class A; the instrument is Class A by product category.

Immunity

EN61326-1 (2013) EMC product standard for Electrical Equipment for Measurement, Control and Laboratory Use.

Test methods, limits and performance achieved are shown below (requirement shown in brackets):

a) EN61000-4-2 (2009) Electrostatic Discharge : 8kV air, 4kV contact, Performance A (B).

EMC

b) EN61000-4-3 (2006) Electromagnetic Field:

3V/m, 80% AM at 1kHz, 80MHz – 1GHz: Performance A (A) and 1.4GHz to 2GHz: Performance A (A); 1V/m, 2.0GHz to 2.7GHz: Performance A (A).

c) EN61000-4-11 (2004) Voltage Interrupt: ½ cycle and 1 cycle, 0%: Performance B (B);

25 cycles, 70% and 250 cycles, 0%: Performance B (C).

d) EN61000-4-4 (2012) Fast Transient, 1kV peak (AC line), 0·5kV peak (DC Outputs), Performance A (B).

e) EN61000-4-5 (2006) Surge, 0·5kV (line to line), 1kV (line to ground), Performance A (B). f) EN61000-4-6 (2009) Conducted RF, 3V, 80% AM at 1kHz (AC line only; DC Output

connections <3m, therefore not tested), Performance A (A). According to EN61326-1 the definitions of performance criteria are:

Performance criterion A: ‘During test normal performance within the specification limits.’ Performance criterion B: ‘During test, temporary degradation, or loss of function or

performance which is self-recovering’. Performance criterion C: ‘During test, temporary degradation, or loss of function or

performance which requires operator intervention or system reset occurs.’ Where Performance B is stated it is because DC Output regulation, or V & I measurement

accuracy, may deviate beyond Specification limits under the test conditions. However, the possible deviations are still small and unlikely to be a problem in practice.

Note that if operation in a high RF field is unavoidable it is good practice to connect the PSU to the target system using screened leads which have been passed (together) through an absorbing ferrite sleeve fitted close to the PSU terminals.

Cautions

To ensure continued compliance with the EMC directive observe the following precautions: a) after opening the case for any reason ensure that all signal and ground connections are

remade correctly and that case screws are correctly refitted and tightened.

b) In the event of part replacement becoming necessary, only use components of an

identical type, see the Service Manual.

alternating current (ac)

Safety

This power supply is a Safety Class I instrument according to IEC classification and has been designed to meet the requirements of EN61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control and Laboratory Use). It is an Installation Category II instrument intended for operation from a normal single phase supply.

This instrument has been tested in accordance with EN61010-1 and has been supplied in a safe condition. This instruction manual contains some information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in a safe condition.

This instrument has been designed for indoor use in a Pollution Degree 2 environment in the temperature range 5°C to 40°C, 20% - 80% RH (non-condensing). It may occasionally be subjected to temperatures between +5° and -10°C without degradation of its safety. Do not operate while condensation is present.

Use of this instrument in a manner not specified by these instructions may impair the safety protection provided. Do not operate the instrument outside its rated supply voltages or environmental range.

WARNING! THIS INSTRUMENT MUST BE EARTHED

Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous. Intentional interruption is prohibited. The protective action must not be negated by the use of an extension cord without a protective conductor.

When the instrument is connected to its supply, terminals may be live and opening the covers or removal of parts (except those to which access can be gained by hand) is likely to expose live parts. The apparatus shall be disconnected from all voltage sources before it is opened for any adjustment, replacement, maintenance or repair. Capacitors inside the power supply may still be charged even if the power supply has been disconnected from all voltage sources but will be safely discharged about 10 minutes after switching off power.

Any adjustment, maintenance and repair of the opened instrument under voltage shall be avoided as far as possible and, if inevitable, shall be carried out only by a skilled person who is aware of the hazard involved.

If the instrument is clearly defective, has been subject to mechanical damage, excessive moisture or chemical corrosion the safety protection may be impaired and the apparatus should be withdrawn from use and returned for checking and repair.

Make sure that only fuses with the required rated current and of the specified type are used for replacement. The use of makeshift fuses and the short-circuiting of fuse holders is prohibited.

Do not wet the instrument when cleaning it. The following symbols are used on the instrument and in this manual:-

Earth (ground) terminal.

mains supply OFF.

mains supply ON.

direct current (dc)

Mains Operating Voltage

Check that the instrument operating voltage marked on the rear panel is suitable for the local supply.

Mains Lead

When a three core mains lead with bare ends is provided this should be connected as follows:

BROWN - MAINS LIVE

Installation

BLUE - MAINS NEUTRAL GREEN/YELLOW - EARTH Safety Earth Symbol

When fitting a fused plug a 5 amp fuse should be fitted inside the plug. As the colours of the wires in the mains lead of this apparatus may not correspond with the coloured markings identifying the terminals in your plug proceed as follows:

The wire which is coloured green-and-yellow must be connected to the terminal in the plug which is marked by the letter E or by the safety earth symbol shown above or coloured green or greenand-yellow.

The wire which is coloured blue must be connected to the terminal which is marked with the letter N or coloured black.

The wire which is coloured brown must be connected to the terminal which is marked with the letter L or coloured red.

WARNING! THIS INSTRUMENT MUST BE EARTHED.

Any interruption of the mains earth conductor inside or outside the instrument will make the instrument dangerous. Intentional interruption is prohibited.

Connections

All connections are made from the front panel. The load should be connected to the positive (red) and negative (black) terminals marked

OUTPUT. Remote sense connections to the load, if required, are made from the positive (+) and

negative (−) SENSE terminals. Switch the LOCAL/REMOTE switch to REMOTE when remote sensing is required. Switch back to LOCAL when remote sensing is not in use.

The terminal marked

is connected to the chassis and safety earth ground.

Switching On

The POWER switch is located at the bottom left of the front panel. When the POWER switch is turned on ( shows Volts and Amps.

l ) the right hand meter briefly indicates the firmware revision before the display

Setting Up the Output

With the POWER switch on (l) and the output off the output voltage and current limit can be

accurately preset using the VOLTAGE and CURRENT controls; the left-hand meter shows the set voltage and the right-hand meter shows the set maximum current.

Operation

When the the actual voltage and the right-hand the actual load current.

output switch is switched on, the ON lamp lights; the left-hand meter now shows

Constant Voltage

The output voltage is adjusted using the coarse and fine VOLTAGE controls; the CURRENT control sets the maximum current that can be supplied.

Constant Current

If the load resistance is low enough such that, at the output voltage set, a current greater than the current limit setting would flow, the power supply will automatically move into constant current operation. The current output is adjusted by the CURRENT control and the VOLTAGE controls set the maximum voltage that can be generated.

The CC lamp lights to show constant current mode.

Instantaneous Current Output

The current limit control can be set to limit the continuous output current to levels down to 10mA. However, in common with all precision bench power supplies, a capacitor is connected across the output to maintain stability and good transient response. This capacitor charges to the output voltage and short-circuiting of the output will produce a current pulse as the capacitor discharges which is independent of the current limit setting.

Protection

The output has intrinsic short-circuit protection and is protected from reverse voltages by a diode; the continuous reverse current must not exceed 3 Amps, although transients can be much higher.

Connection to the Load

The load should be connected to the positive (red) and negative (black) output terminals. Both are fully floating and either can be connected to ground.

Remote Sensing

The unit has a very low output impedance, but this is inevitably increased by the resistance of the connecting leads. At high currents this can result in significant differences between the indicated source voltage and the actual load voltage (two 20mΩ connecting leads will drop 0.2V at 5 Amps, for instance). This problem can be minimised by using short, thick, connecting leads, but where necessary it can be completely overcome by using the remote sense facility.

This requires the sense terminals to be connected to the output at the load instead of at the source; insert wires into the spring-loaded SENSE terminals and connect directly to the load. Switch the LOCAL/REMOTE switch to REMOTE. To avoid instability and transient response problems, care must be taken to ensure good coupling between each output and sense lead. This can be done either by twisting the leads together or by using coaxially screened cable (sense through the inner). An electrolytic capacitor directly across the load connection point may also be beneficial.

The voltage drop in each output lead must not exceed 0.5 Volts. Switch the LOCAL/REMOTE switch back to LOCAL when remote sensing is not in use.

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