Information

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 - operation via RS-232
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.
EX752M, EX355P