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| EL Series - Description and Specifications |
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30W to 130W Linear, Single, Dual & Triple Output
Single outputs, 30V/1A, 18V/3.3A, 56V/1.1A,
15V/5A, 30V/3A
Single, dual or triple outputs, 30V/2A
Independent digital voltage and current meters
for each output with 3 digit resolution
Constant voltage or constant current operation
Variable 1.5 - 5.0V auxiliary output at 2A (EL302Tv)
Compact design uses less bench space
DC output switches, automatic mode indication
Picture of several models
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High performance at low cost
The EL series of DC bench power supplies has been designed to meet the need for a compact power supply of good performance at a reasonable price.
They provides medium levels of power (up to 125 watts) with fan-free cooling for silent operation.
Linear regulation
The EL series uses all linear regulation for the best possible performance. Excellent line and load regulation is matched by very low output noise and good transient response.
Simultaneous digital metering
The EL series incorporates separate digital voltage and current meters on each main 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 current provides accurate information “at a glance” and avoids any possibility of misinterpretation. When an output switch is set to “off”, the current limit setting is displayed enabling conditions to be set before the load is connected.
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Constant voltage or constant current
The main outputs can operate in constant voltage or constant current mode with automatic crossover and mode indication. Coarse and fine voltage controls are provided. The current control is logarithmic enabling low current levels to be set accurately.
Auxiliary low-voltage output
The EL302Tv incorporates a third output
variable between 1.5V and 5.0V with a fixed current limit of 2A.
The set voltage can checked using the digital displays.
Single, dual or triple outputs
The EL series includes six single output models plus one dual output and one triple output model.
The EL302D has two independent and isolated outputs each with a 0 to 30V, 0 to 2A capability and its own on-off switch. The outputs can be wired in either series or parallel to provide voltages up to 60 volts or currents up to 4 amps.
All outputs are intrinsically short circuit proof, and are protected against external voltages and reverse currents.
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EL series - range |
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Single Output |
| EL301 |
30V/1A |
30 watts |
| EL183 |
18V/3.3A |
60 watts |
| EL302 |
30V/2A |
60 watts |
| EL561 |
56V/1.1A |
60 watts |
| EL155 |
15V/5A |
75
watts |
| EL303 |
30V/3A |
90
watts |
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Dual Output |
| EL302D |
2 x 30V/2A |
120 watts |
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Triple
Output |
| EL302Tv |
2 x 30V/2A + 5V/2A |
130 watts |
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A Bus Programmable version,
the EL302P, is also available.
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SPECIFICATIONS
MAIN OUTPUTS
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Operating Mode
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Constant voltage or constant current with
automatic cross-over and indication.
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Voltage Setting
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0V to >rated O/P by coarse and fine
controls.
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Current Setting
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0A to >rated O/P by single logarithmic
control.
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Load regulation
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<0.01% of max. O/P for a 90% load change.
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Line regulation
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<0.01% of max. O/P for a 10% line voltage
change.
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Output impedance
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Typically <5mW in constant voltage mode.
Typically >50kW in constant current mode.
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Ripple & Noise (20MHz bandwidth)
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Typically
<1mV rms.
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Transient Response
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<20µs to within 50mV of set
level for 90% load change.
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Temp. Coefficient
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Typically <100ppm/oC.
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Output Protection
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Outputs will withstand forward voltages
above the rated output voltage. Reverse protection by diode clamp for currents
up to 3A.
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Status Indication
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Output ON lamps. Constant current lamps.
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Output Switch
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Electronic. Preset voltage and current
displayed when output is off.
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Output Terminals
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4mm terminals on 19mm (0.75") pitch .
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METERS (main outputs)
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Meter Types
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Separate 3 digit meters for voltage & current
with 14mm (0.56") LED displays. Reading rate 4/sec.
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Meter Resolutions
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100mV, 10mA.
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Meter Accuracies
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Voltage 0.3% ±1 digit. Current 0.6% ±1
digit.
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AUXILIARY LOW VOLTAGE OUTPUT (EL302Tv)
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Voltage
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Variable <1.5V to >5V by front panel control.
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Meter Voltage accuracy
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±0.3% ±1 digit
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Current limit
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2A minimum.
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Load regulation
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<3% for 90% load change.
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Line regulation
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<0.2% for 10% line voltage change.
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Ripple & Noise (20MHz bandwidth)
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Typically <5mVrms, <15mVpk-pk (CV mode).
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Output Protection
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Output will withstand up to 7V forward voltage. Diode clamp
reverse protection for currents up to 3A.
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Output Terminals
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4mm terminals on 19mm (0.75") pitch .
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Status Indication
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UNREG lamp.
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POWER
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AC Input
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230V or 115V ±10% AC, 50/60Hz,
Installation Category II.
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SIZE AND WEIGHT
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Size
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140 x 160 x 320mm
(single); 260 x 160 x 320mm (dual/triple)
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Weight
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3.4 to 7.5 kg.
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ENVIRONMENTAL
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Operating Range
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+5oC to +40oC, 20% to 80% RH.
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Storage Range
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-40oC to + 70oC.
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Environmental
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Indoor use at <2000m, Pollution Degree 1.
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Safety
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Complies with EN61010-1.
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EMC
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Complies with EN61326.
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Thurlby
Thandar Instruments Ltd. operates a policy of continuous development and
reserves the right to alter specifications
without prior notice.
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Thurlby Thandar Instruments
Limited
Glebe Road, Huntingdon, Cambridgeshire PE29 7DR
Tel: 01480 412451 Fax: 01480
450409 Web: www.tti.co.uk Email:
sales@tti.co.uk |
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