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| PL Series - Description and Specifications |
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Model Range:
PL320 - 32V/2A, PL330 - 32V/3A, PL3154
- 15V/4A, PL320QMD - 32V/2A Dual,
PL330QMD -
32V/3A Dual, PL320QMT - 32V/2A Triple, PL330QMT
- 32V/3A Triple
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OVERVIEW
The Thurlby Thandar PL series of laboratory bench power supplies has established
itself in many countries as an “industry standard” range.
Digital accuracy and convenience
PL series units incorporate digital meters with a 3.75 digit scale length
(4095 counts) to provide greater accuracy and resolution than other PSUs.
Large and bright LEDs give a clear and unambiguous reading. An update rate of 4
per second provides near instantaneous response.
Separate meters are used for voltage and current, eliminating the need for meter
function switches with their attendant problems of misinterpretation.
A damping switch for the current meter simplifies measurements on rapidly
varying loads.
Remote sense for precision at high currents
Remote sense terminals enable the precision to be maintained at high
currents by eliminating the effects of connection lead resistance.
Without remote sense lead resistance of just a few tens of milliohms can
seriously degrade regulation and produce misleading results. (Two cables of 0.05W
each will drop a total of 0.3V at 3 Amps.)
Greater resolution and control
The PL series sets the standard for simple and comprehensive control.
Voltages are set with coarse and fine controls for speed with precision.
Currents are set with a semi-logarithmic control for increased resolution at low
current levels.
The DC output switch enables voltage and current levels to be set before the
load is connected. With the output switch “off” the the current limit set
point is displayed. With the output switch “on” the actual output current
flowing is displayed.
This invaluable feature allows delicate circuits to be protected by accurately
setting the current limit level (down to a few milliamps if necessary) before
connecting the circuit under test.
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Quad-mode duals and triples
The 32V-2A and 32V-3A supplies are each available as a dual unit
incorporating push button selection of four modes of operation:
Isolated - 2 x
single outputs
True Parallel -
The Master acts as a single supply of twice the current
capability.
Series - Outputs
connected in series but with independent control.
Series Tracking -
As series but both voltages are set with the Master voltage
control.
Each of the quad-mode dual models is alternatively available as a
triple
supply incorporating one further independent output. This is a higher current 5
Volt output intended for powering logic circuits. The current rating and
sophistication of the logic output varies according to the model as follows:
PL320QMT
Variable output voltage (4V to 6V) and variable current limit (0.1A to 4A).
Calibrated voltage control. Remote sense terminals, DC output switch,
over-voltage trip.
PL330QMT
Variable output voltage (4V to 6V) and variable current limit (0.1A to 7A).
Digital meter for current measurement and voltage setting. Remote sense
terminals, DC output switch, over-voltage trip.
Safety and protection
PL series PSUs are designed and built to meet the stringent requirements of
IEC348 and IEC1010.
All outputs are fully protected against short circuit, reverse voltage and
reverse currents.
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SPECIFICATIONS
MAIN OUTPUT(S)
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Output Range
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0 - 32 Volts nominal; 0 - 15.5V (PL154).
0 - 2.1A (PL320); 0 -
3.1A (PL330); 0 - 4A (PL154).
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Voltage Setting
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By coarse and fine controls; resolution <5mV.
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Current Setting
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By single logarithmic control.
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Output Mode
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Constant voltage or constant current modes with automatic cross-over.
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Configuration Selection
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Isolated, True parallel, Series or Series Tracking via front panel switches. (QMD
and QMT only)
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Output Switch
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Isolates the output. Permits voltage and current limits to be set up before
connecting the load.
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Output Terminals
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4mm terminals on 19mm (0.75") spacing.
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Output Impedance
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Constant Voltage Typically <5mW at 1kHz.
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Constant Current Typically 50kW.
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Output Protection
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Max. output voltage +20 volts forward; diode clamped for reverse, up to 3A
reverse current.
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Load Regulation
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<0.01% of max. output for 90% load change
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Line Regulation
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<0.01% of max. output for 10% line change
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Remote Sense
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Eliminates up to 0.5V drop per lead.
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Ripple and Noise
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Typically <1mV rms
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Transient Response
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<20usec to <50mV for 90% load change
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Temp. Coefficient
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Typically <100ppm/oC
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Meter Type
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Dual 4 digit with 12.5mm LEDS, Reading rate 4 per second.
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Meter Resolution
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Voltage 10mV over the entire range, Current 1mA over the entire range
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Meter Accuracy
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Voltage ±(0.1% of reading + 1 digit), Current ±(0.3% of reading + 1 digit)
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Current Meter Damping
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Nominally 20ms, switchable to 2 sec for averaging of rapidly varying loads
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LOGIC OUTPUT - PL320QMT & PL330QMT
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Output Range
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4 to 6 Volts at 0.1 - 4 Amps (7A on PL330QMT).
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Output Switch
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Isolates the output and permits output voltage to be set before connecting the
load.
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Output Protection
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Over-voltage protection operates above 7V.Diode clamped for reverse currents up
to 3A.
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Load Regulation
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<0.01% of max. output for 90% load change
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Line Regulation
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<0.01% of max. output for 10% line change
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Remote Sense
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Eliminates up to 0.5V drop per lead.
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Ripple and Noise
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Typically <1mV rms
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Transient Response
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<20µsec to <50mV for 90% load change
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Temp. Coefficient
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Typically <100ppm/oC
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LOGIC OUTPUT METER - (PL330QMT only)
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Meter Type
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3 digit with 12.5mm LEDs. Reading rate 4/s. Shows
volts with output off, amps with output on.
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Meter Resolution
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Voltage 10mV, Current 10mA
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Meter Accuracy
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Voltage ±(0.2% of reading + 1 digit ), Current
±(0.5% of reading + 1 digit )
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GENERAL
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Power Requirements
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110, 120, 220 or 240VAC 50/60Hz ±10%
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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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-20oC
to +60oC
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Size
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Single - 170(H) x 155(W) x 265mm(D), (PL330
- 300D)
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Dual - 170(H) x 350(W) x 265mm(D), (PL330QMD -
300D)
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Triple - 170(H) x 425(W) x 265mm(D), (PL310QMD -
350W, PL330QMD - 300D)
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Weight
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PL320 & PL154 - 5.0kg,
PL330 - 6.0kg, PL320QMD - 9.5kg, PL330QMD - 12.0kg, PL320QMT - 13.5kg, PL330QMT - 15.5kg.
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Electrical Safety
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Designed and manufactured to comply with
IEC 348 and IEC1010-1. Full safety sockets available to special order.
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EMC
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Designed and manufactured to comply with
EN50081–1 and EN50082–1.
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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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"Industry Standard" laboratory PSU
range
