Specifications - EL-R Series

EL-R MODEL RANGE

Voltage/Current Levels

EL301R

0 to >30V; 0 to >1A

(30W nominal power)

EL183R

0 to >18V; 0 to >3.3A

(60W nominal power)

EL302R

0 to >30V; 0 to >2A

(60W nominal power)

EL561R

0 to >56V; 0 to >1.1A

(60W nominal power)

EL155R

0 to >15V; 0 to >5A

(75W nominal power)

EL303R

0 to >30V; 0 to >3A

(90W nominal power)

EL302RD

2 x (0 to >30V; 0 to >2A)

(120W nominal power)

EL302RT

2 x (0 to >30V; 0 to >2A)

(130W nominal power)

plus 1.5 to 5.0V @ 2A

OUTPUT SPECIFICATIONS

Output Setting & Control

Voltage Setting:

By coarse and fine controls.

Current Setting:

By single logarithmic control.

Output Mode:

Constant voltage or constant current with automatic cross-over.

CC indicator lit in constant current mode.

Output Switch:

Electronic, non isolating. Preset voltage and current limit displayed

when Output is off. On state indicated by LED.

Output Performance

Ripple & Noise:

Typically <1mV rms, (CV mode, 20MHz bandwidth).

Load Regulation:

<0·01% of maximum output for a 90% load change

(using remote sense).

Line Regulation:

<0·01% of maximum output for 10% line change.

Transient Response: <50µs to within 50mV of setting for a 5% to 95% load change.

Temp. Coefficient:

Voltage: typically <100ppm/°C.

Output Protection

Output Protection:

Output will withstand forward voltages of up to 20V above rated

output voltage. Reverse protection by diode clamp for currents to 3A.

Output Connections

Output Terminals:

Universal 4mm safety binding posts on 19mm (0·75”) spacing.

Terminals can accept fixed shroud 4mm plugs, standard 4mm plugs, fork terminals and bare wires.

Remote Sense

Sense Selection:

Voltage sensing is selected as Local or Remote by front panel switch.

Sense Terminals:

Sprung loaded screw-less terminals.

METER SPECIFICATIONS

Display Type:

Dual 4-digit meters, 14mm (0·56”) LED.

Voltage Meter

Resolution:

10mV

Accuracy:

0·3% of reading ± 3 digits

Current Meter

Resolution:

1mA

Accuracy:

0·5% of reading ± 3 digits

AUXILIARY OUTPUT (EL302RT only)

Voltage:

Variable <1.5V to >5V by front panel control.

Meter accuracy:

0.3% ± 4 digits.

Current limit:

2A minimum.

Load regulation:

<3% for 90% load change.

Line regulation:

<0.2% for 10% line voltage change.

Ripple & Noise

Typically <5mVrms, <15mVpk-pk (20MHz bandwidth):

Output Protection:

Output will withstand up to 7V forward voltage.

Diode clamp reverse protection for currents up to 3A.

Output Terminals:

Universal 4mm safety binding posts on 19mm (0·75”) spacing.

Status Indication:

UNREG lamp.

GENERAL SPECIFICATIONS

Input

AC Input:

230V AC or 115V AC ± 10%, 50/60Hz. Installation Category II

VA Ratings:

EL301R - 85 VA; EL302R, EL302P, EL183R, EL561R - 160VA;

EL155R, EL303R - 250VA; EL302RD, EL302RT - 320VA

Temperature & Environmental

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.

Cooling:

Silent fan-less convection cooling.

Safety & EMC

Safety:

Complies with EN61010-1

EMC:

Complies with EN61326

Physical

Size:

Single output models - 140x160x295 mm (WxHxD).

Dual and triple output models - 260x160x295 mm (WxHxD).

Weight:

EL301R - 3.4kg; EL302R, EL302P, EL183R, EL561R - 4.4kg:

EL155R, EL303R - 5.0kg; EL302RD, EL302RT - 7.5kg.

Accuracy specifications apply for the temperature range 18°C to 28°C after 1 hour warm-up.

Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the

right to alter specifications without prior notice.

EX752M - higher voltage multi-mode dual

Output voltages up to 150V

The EX752M is a dual output 300 watt PSU with Multi-Mode capability.

This enables it to operate as a dual power supply with two independent

and isolated outputs, or as a single power supply of double the power.

As a dual, each output provides 0 to 75V at 0 to 2A (mode A). As a

single, the output can be selected as either 0 to 75V at 0 to 4A (mode B)

or 0 to 150V at 0 to 2A (mode C). In single modes, the unused half of

the unit becomes completely inoperative and its displays are blanked.

EX355P/EX355P-USB:

operation via RS-232 or USB

The EX355P is a digitally controlled version of the EX355 with an

isolated RS-232 interface.

It offers a low-cost solution for a basic programmable PSU and will be

sufficient for many applications where the sophistication and complexity

of GPIB is not needed.

A simple command set allows remote control of voltage, current

and output enable together with read-back of metering values and

operational status. Local control is via three rotary encoders providing

rapid and accurate setting of voltage and current during bench use.

The EX355P-USB has similar functionality but is controlled via a USB

interface.

EX752M, EX355P