Laboratory Power Supply Products from TTi - Thurlby Thandar Instruments

EB2025T - Description and Specifications

EB2025T - Triple Output 'Basic' PSU

Twin variable outputs to 20V
Analogue meter for voltage and current levels
Fixed 5V logic level output
All outputs fully isolated
Good line & load regulation, low output noise
Protection for shorts, forward & reverse voltage
Compact, lightweight design

GENERAL DESCRIPTION

The EB2025T is a general purpose bench power supply intended for applications requiring stable and controllable sources of DC voltage at low cost. Three independent and fully isolated outputs are provided.

Output A is a fixed 5 volt output with a maximum current capability of 1 amp and full short circuit protection. Outputs B and C are independently adjustable from 0.3 volts up to 20 volts with a maximum current capability of 250 milliamps each.

The built-in analogue meter can be set to measure voltage or current for either of these outputs.

Outputs B and C also offer fully variable control of the current limit point. This can be used to provide over-current protection for delicate circuits.

Alternatively the outputs can be used as constant current sources with automatic crossover between constant voltage and constant current operation.

The outputs can operate continuously into a short circuit at maximum current setting. Because they are fully isolated, outputs B and C can be externally connected either in series or in parallel to provide voltages up to 40 volts or currents up to 500 milliamps.

All three outputs are protected against accidental connection of forward or reverse voltages.

SPECIFICATIONS

VARIABLE OUTPUTS

Voltage Range	0·3V to 20V minimum.
Current Range	1mA to 250mA minimum.
Voltage Setting	By single linear rotary control.
Current Setting	By front panel screwdriver adjustment.
Operating Mode	Constant voltage or constant current with automatic cross–over.
Output Protection	Outputs will withstand forward voltages up to 30V. Reverse protection by diode clamp for currents up to 1A.
Load Regulation	<0·2% of max. output for 90% load change.
Line Regulation	<0·1% of max. output for 10% line change.
Ripple	<2mV rms
Meter Accuracy	± 5% of reading ± 0·5% of full–scale.

LOGIC OUTPUT

Voltage	5V ± 0·2V
Current Limit	1A minimum.
Output Protection	Output will withstand up to 16V forward voltage. Diode clamp reverse protection for currents up to 1A.
Ripple	<2mV rms.
Load Regulation	<2% for a 90% load change.
Line Regulation	<0·2% for a 10% line change.
Status Indication	Overload lamp (current >1 Amp).

GENERAL

Output Terminals	4mm terminals on 19mm (0·75") pitch.
AC Input	230V AC or 115V AC ± 10%, 50/60Hz. Installation Category II.
Power Consumption	50VA max.
Operating Range	+5°C to +40°C, 20% to 80% RH.
Storage Range	–40°C to +70°C.
Environmental	Indoor use at altitudes up to 2000m, Pollution Degree 1.
Safety	Complies with EN61010–1.
EMC	Complies with EN50081–1 & EN50082–1.
Size	220 x 82 x 230mm.
Weight	1·8 kg.

Thurlby Thandar Instruments Ltd. operates a policy of continuous development and reserves the right to alter specifications
without prior notice.

Thurlby Thandar Instruments Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR United Kingdom
Tel: +44 1480 412451 Fax: +44 1480 450409 Web: www.tti-test.com Email: sales@tti-test.com