Aim TTi EX4210R INSTRUCTION MANUAL [ml]

EX4210R

Bench Power Supply

Introduction

The EX4210R is an exceptionally compact and lightweight single output laboratory dc power supply providing 0 to 42V at 0 to 10A.

The EX4210R uses mixed−mode regulation technolog y which combines switch−mode pre−regulation 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 reg ulator.

Excellent line and load regulation are matched by low noise and good transient response. High resolution controls allow accurate setting of voltage and cur r ent levels. Remot e sens e t er minals are provided so that good regulation can be maintained across r em ot e loads at high currents.

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

The EX series incorporates separate digital voltage and current m eters 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 curr ent provides accurate information “at a glance” and avoids any possibility of misinterpretation. When the output switch is set to “off”, the cur r ent limit setting is displayed enabling conditions to be set before t he load is connected.

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

2 3

Table of Contents

Introduction 1 Specification 4 Safety 5 Installation 6 Connections 6 Operation 7 Maintenance 8

Instructions en Francais

Sécurité 9 Installation 10 Connexions 10 Fonctionnement 11 Maintenance 12

Bedienungsanleitung auf Deutsch

Sicherheit 13 Installation 14 Anschlüsse 14 Betrieb 15 Wartung 17

Istruzioni in Italiano

Sicurezza 18 Installazione 19 Collegamenti 19 Funzionamento 20 Manutenzione 22

Instrucciones en Español

Seguridad 23 Instalación 24 Conexiones 24 Operación 25 Mantenimiento 27

Voltage Range:

0V to 42V minimum

Current Range:

0A to 10A 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”) pit ch.

terminals for remote connec t ion.

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

Protection:

temperature to rise excessively.

sense.

Line Regulation:

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

(20MHz bandwidth):

Transient Response:

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

Temperat ure Coefficient:

Typically <100ppm/°C

Status Indication:

Output on lamp. Constant current mode lam p.

Meter Types:

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

Meter Resolutions:

10mV, 10mA

Current 0.6% of reading ± 3digits

factory option. Installation Category II .

Power Consumption:

800VA max.

Operating Range:

+5ºC to +40ºC, 20% to 80% RH.

Storage Range:

−40ºC to + 70ºC.

Environmental:

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

instrument via http://www.aimtti.com/support (serial no. needed).

Size:

140 x 160 x 320mm (WxHxD).

Weight:

3.6kg

OUTPUT

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

Output Protection: Output will withstand up to 48V forward voltage.

Specification

Over-temperature

Load Regulation: <0.01% of maximum output for a 90% load change, using remot e

Ripple & Noise

METER SPECIFICATIONS

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

GENERAL

AC Input: 220-240VAC ±10%, 50/60Hz; 110-120VAC ± 10%, 50/60Hz by

The output will be tripped off if a fault caus es t he int er nal

Typically <2mVrms, <20mV pk-pk, constant voltage mode.

Safety & EMC: Complies with EN61010-1 & EN61326-1.

For details, request the EU Declaration of Conformity for this

mains supply OFF.

alternating current (ac)

Safety

This power supply is a Safety Class I instrument according t o I EC classification and has been designed to meet the requirem ents of EN61010-1 (Safety Requirements f or Elect r ical Equipment for Measurement, Control and Laborator y Use). I t is an Installation Category II instrument intended for operation fr om a nor m al single phase supply.

This instrument has been tested in accordanc e with EN61010-1 and has been supplied in a safe condition. This instruction manual contains some inform at ion and warnings which have to be followed by the user to ensure safe operation and to r etain the inst r um ent in a safe condition.

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

Use of this instrument in a manner not spec ified by these instructions may impair the safety protection provided. Do not operate the instrum ent outside its rat ed supply voltages or environmental range.

WARNING! THIS INSTRUMENT MUST BE EARTHED

Any interruption of the mains earth conduct or inside or outside t he inst r um ent will make the instrument dangerous. Int ent ional inter ruption 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, m aint enance 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 s witching 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, excessi ve 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 c ur r ent 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 m anual:-

Earth (ground) terminal.

mains supply ON.

direct current (dc)

Mains Operating Voltage

Check that the instrument oper at ing voltage marked on the rear panel is suitable for the local supply.

Mains Lead

When a three c or e m ains lead with bare ends is provided this should be connect ed as follows:

BROWN - MAINS LIVE

Installation

When f it t ing 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 mark ings 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.

Any interruption of the mains earth conduct or inside or outside t he inst r um ent will make the instrument dangerous. Int ent ional inter ruption is prohibited.

Ventilation

The power supply is cooled by a low-speed fan which vents at the rear. Take car e not to restrict the air inlets at the side panels or the exit at the rear.

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

WARNING! THIS INSTRUMENT MUST BE EARTHED.

Connections

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

OUTPUT. Remote sense connections to the load, if r equired, are made from t he posit ive (+) 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 eart h ground.

Setting Up the Output

With the PO WER 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 c ur r ent .

Operation

When the the actual voltage and the right-hand meter t he 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 coar se and fine VOLTAGE controls; the CURRENT control sets the maximum current that c an be supplied.

Constant Current

If the load resistance is low enough such that, at t he out put voltage set, a current greater t han 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 VOLTAG E cont r ols 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 t o 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-cir cuit pr ot ec t ion and is pr ot ected 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 negat ive (black ) OUTPUT terminals. Both are fully floating and either can be connect ed t o 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 differ ences 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, t hick, connecting leads, but where necessary it can be completely overcome by using the remote sense f acility.

This requires the sense term inals 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 t o ensur e good coupling between each output and sense lead. This can be done either by twisting the leads together or by using c oaxially 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.

Series or Parallel Connection with Other Outputs

The outputs of the power supply are fully floating and m ay be used in series with other power supply units to generate high DC voltages up to 300V DC.

The maximum permissible voltage between any terminal and earth ground ( WARNING! Such voltages are exceedingly hazardous and great care should be taken to shield

the output terminals for s uch use. On no account should the output terminals be touc hed when the unit is switched on under such use. All connections to the terminals must be made with the power switched off on all units.

It should be noted that the unit can only source current and cannot sink it, thus units cannot be series connected in anti-phase.

The unit can be connected in parallel with others to produce higher currents. Where several units are connected in parallel, the output voltage will be equal to that of the unit with the hig hes t output voltage setting until the current dr awn exceeds its current limit s et t ing, upon which the output will fall to that of the next highest setting, and so on. In constant current mode, units can be connected in parallel to provide a current equal to the sum of the current limit settings.

Note that the output terminals are r ated at 15A maximum; if several outputs are operated in parallel to source higher currents than this the junction should be made at a separate point, not one of the terminals.

Over-temperature Protection

Sensors on both the primary and secondary heatsinks will detect over-temperat ure due to blocked air flow, fan failure or other circuit fault. O ver-temperature will shut down the output (the display will read 0 Volts and 0 Amps if the output is ON) though t he out put ON lamp will remain lit. The output will remain shut down even after the heatsinks have cooled down. When the caus e of the over-temperature has been r emoved and the heatsinks have cooled to normal working temperatures the output can be r eset by tur ning the POWER switch off (

) is 300VDC.

) then on ( l ) again.

The Manufacturers or their ag ents overseas will provide repair for any unit developing a f ault. Where owner wish to undertake t heir own maintenance work , this should only be done by skilled personnel in conjunction with the service manual which may be purchased directly from the Manufacturers or their agents overseas.

Fuse

The correct fuse type is:

Note that the main function of the fuse is to make the instrument safe and limit damage in t he event of failure of one of the switching devices. If a fuse fails it is therefore very likely that the replacement will also blow, because the supply has developed a fault; in such circumstances the instrument will need to be returned to the manuf ac t ur er for service.

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

To replace a fuse, first disconnect the inst r ument from the AC supply. Remove the 6 cover securing screws and lift off the cover. Replace the fuse with one of the correct t ype and refit the cover.

Cleaning

If the PSU requires cleaning use a clot h t hat is only lightly dampened with water or a mild detergent. Polish the display window with a soft dry cloth.

Maintenance

10 Amp 2 5 0V HBC time-lag(T), 5 x 20mm.

WARNING! TO AVOID ELECTRIC SHOCK, OR DAMAGE TO THE PSU, NEVER AL LOW WATER TO GET INSIDE THE CASE. TO AVOID DAMAGE TO THE CASE OR DISPLAY WINDOW NEVER CLEAN WITH SOLVENTS.

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