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 - 140160295 mm (WxHxD). Dual and triple output models - 260160295 mm (WxHxD).

Weight: EL301R - 3.4kg; EL302R, EL302P, EL183R, EL561R - 4.4kg:
EL155R, EL303R - 5.0kg; EL302RD, EL302RT - 7.5kg.

• Single outputs, 30V/1A, 18V/3.3A, 56V/1.1A, 15V/, 30V/3A
• Single, dual or triple outputs, 30V/2A
• Independent digital voltage and current meters  for each output with 4 digit resolution
• Switchable local or remote sensing
• Constant voltage or constant current operation
• Variable 1.5 - 5.0V auxiliary output at 2A (EL302RT)
• Compact design uses less bench space
• Silent fan-free cooling
• DC output switches, automatic mode indication
• RS232 or USB controlled models available (30V/2A single)

OUTPUT

Voltage/Current Ranges

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 > (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) plus 1.5 to 5.0V @ 2A (130W nominal power)

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 in constant current mode.

Output Switch: Electronic, non isolating. Preset voltage and current limit displayed when Output off.

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

Temp. Coefficient: Voltage: typically <100ppm/oC.

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

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