PL303QMT-P - Power Supply Aim TTi - Free user manual and instructions

Product Type	Triple Output Precision Linear DC Power Supply
Model	PL303QMT-P
Brand	Aim TTi
Outputs	Two 0-30V, 0-3A (each) and one 0-6V, 0-8A; parallel mode up to 30V, 6A
Operating Modes	Independent, True Parallel, Isolated Tracking, Isolated Ratio Tracking
Voltage Setting	Coarse and fine controls; digital V-Span for end-stop limits
Current Setting	Single logarithmic control; Low I range (0.1mA resolution on 30V outputs)
Meter Display	Dual 4-digit 10mm LED; resolution 10mV/1mA (1mV/0.1mA on low I range for 6V output)
Ripple and Noise (20MHz BW)	<0.4mVrms, 2mVp-p (30V outputs); <0.6mVrms, 2mVp-p (6V output)
Load Regulation	Voltage: <0.01% + 2mV; Current: typ. <0.01% + 500μA
Line Regulation	Voltage: <0.01% + 2mV; Current: <0.01% + 250μA for 10% line change
Protections	OVP and OCP (fixed at 105% in local mode), OTP, output reverse diode clamp
Digital Interfaces	RS232, USB, LAN (LXI), GPIB (optional)
Remote Control (Analogue)	0-5V or 0-10V inputs for voltage and current; remote off via rear panel
AC Input	230V or 115V ±10%, 50/60Hz, Installation Category II
Power Consumption	840VA max (triple)
Dimensions (W x H x D)	321mm x 131mm (3/4 rack 3U) x 288mm (excluding feet, knobs, terminals)
Weight	12.6 kg
Safety Compliance	EN61010-1, EN61326-1
Cooling	Intelligent variable-speed fan with over-temperature shutdown
Operating Environment	+5°C to +40°C, 20% to 80% RH, indoor use up to 2000m, Pollution Degree 2
Storage Temperature	-40°C to +70°C
Cleaning	Wipe with a damp cloth; do not use solvents or abrasives
Reparability	No user-serviceable parts inside; refer servicing to qualified personnel

Frequently Asked Questions - PL303QMT-P Aim TTi

How do I set the output voltage on the PL303QMT-P?

Use the VOLTAGE controls: MAIN for coarse and FINE for fine adjustment. The V-Span feature allows you to set digital end-stop limits for the coarse control. Hold the Vmax or Vmin button to set the desired span.

What is the difference between Independent, Parallel, Tracking, and Ratio Tracking modes?

In Independent mode, each output is isolated and functions as a separate supply. Parallel mode combines Output 1 and 2 for double current (up to 6A). Tracking mode makes the slave output follow the master voltage. Ratio Tracking allows a percentage of the master voltage to be set on the slave.

What is the maximum current in parallel mode?

In parallel mode, the combined output can deliver up to 30V and 6A. The current setting resolution is 2mA (or 0.2mA on low I range).

How do I connect remote sense for better load regulation?

Use the screwless SENSE terminals on the front panel. Connect the positive sense lead to the load's positive terminal and negative sense to load's negative. Ensure sense lead resistance is less than 0.5Ω.

What digital interfaces are available on the PL303QMT-P?

The PL-P model includes RS232, USB (virtual COM port), LAN (LXI Core 2011), and optional GPIB (IEEE488). All support full remote control and readback.

How do I reset the instrument to factory settings?

There is no dedicated factory reset button. To restore defaults, you may need to cycle power or use remote commands. Refer to the manual for specific procedures.

What does the CC indicator mean?

The CC (Constant Current) indicator lights when the power supply is operating in constant current mode, meaning the output current is at the set limit and the voltage is lower than the set value.

What is the warm-up time required before accurate measurements?

Allow at least 1 hour warm-up with no load and calibration at 23°C for full accuracy. Specifications are valid for 18°C to 28°C.

How should I clean the PL303QMT-P?

Disconnect the power supply. Clean the exterior with a damp cloth using mild soap if necessary. Do not use solvents, abrasives, or allow moisture inside the unit.

What does OTP mean and how does it work?

OTP stands for Over-Temperature Protection. If internal temperatures exceed safe thresholds, the output trips off automatically to prevent damage. The fan speed increases as needed.

USER MANUAL PL303QMT-P Aim TTi

AIM & THURLBY THANDAR INSTRUMENTS

New PL & PL-P Series

Precision Linear DC Power Supplies

General specifications apply for the temperature range 5° C to 40° C. Accuracy specifications apply for the temperature range 18° C to 28° C after 1 hour warm-up with no load and calibration at 23° C. Typical specifications are determined by design and are not guaranteed.

OUTPUTS

Voltage/Current Ranges:
PL 068	0V to 6V/1mA to 8000mA; 0V to 6V/0.1mA to 800mA
PL 155	0V to 15V/1mA to 5000mA; 0V to 15V/0.1mA to 500mA
PL 303	0V to 30V/1mA to 3000mA; 0V to 30V/0.1mA to 500mA
PL 601	0V to 60V/1mA to 1500mA; 0V to 60V/0.1mA to 500mA
PL303QMD & PL303QMT	0V to 30V/1mA to 3000mA; 0V to 30V/0.1mA to 500mA (each 30V output); 0V to 30V/2mA to 6000mA; 0V to 30V/0.2mA to 1000mA (parallel mode). & 0V to 6V/1mA to 8000mA; 0V to 6V/0.1mA to 800mA (PL303QMT O/P3)
Note: In manual operation, actual maxima for voltage and current are typically 1% greater than the figures given above.
Voltage Setting:	By coarse and fine controls.
Current Setting:	By single logarithmic control.
Configuration Selection: (PL303QMD & QMT only)	Independent, True parallel, Isolated Tracking & Isolated Ratio Tracking modes via front panel rotary switch.
Voltage Span Control (V-Span)	The voltage adjustment range can be controlled by digital setting of the end-stop values of the coarse voltage control to any desired values. The range for Vmax is 0.1V to 6V/15V/30V/60V depending on model. The range for Vmin is 0 to (Vmax - 0.1V).
Settings Lock (S-Lock)	Voltage and current settings can be locked by a single button press. Lock accuracy is equal to meter accuracy (see Meter Specification)
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. Output rise time with no load <15ms.
Output Terminals:	Universal 4mm safety binding posts on 19mm (0·75") spacing for Output; screwless terminals for Sense.
Transient Response:	<50μs to within 50mV of set level for a 5% to 95% load change.
Voltage Programming Speed (PL-P models):	Maximum time required for output to settle within 1% of its total excursion (for resistive load). Excludes command processing time.
		Full Load	No Load		Full Load
6V 8A	Up	20ms	5ms	Down	5ms
6V 800mA	Up	20ms	5ms	Down	20ms
15V 5A	Up	45ms	40ms	Down	6ms
15V 500mA	Up	45ms	40ms	Down	60ms
30V 3A	Up	45ms	40ms	Down	20ms
30V 500mA	Up	45ms	40ms	Down	50ms
60V 1·5A	Up	45ms	40ms	Down	50ms
60V 500mA	Up	70ms	40ms	Down	110ms

Ripple and Noise(20MHz bandwidth):	Normal mode voltage: <0·4mVrms and 2mVp-p (15V, 30V & 60V O/Ps)<0·6mVrms and 2mVp-p (6V O/P)
	Normal mode current: <0·2mArms; <40μArms Low I range (15/30/60V O/Ps)<0·6mArms; <100μArms Low I range (6V O/P)
	Common mode current: <5μArms
Load Regulation:	For any load change, measured at the terminals, using remote sense:Voltage: <(0·01% + 2mV). Add typically 2·5mV for a 0·5V drop in the positive output lead. Specification applies for sense lead resistance <0·5Ω.Current: typically <(0·01% + 500μA).
Line Regulation:	Voltage: <(0·01% + 2mV) for 10% line change.Current: <(0·01% + 250μA) for 10% line change.
Temperature Coefficient:	Voltage: typically <(50ppm + 0·5mV)/°CCurrent: typically <(100ppm + 1mA)/°C; <(100ppm + 0·1mA)/°C Low I range.
Output Protection:	Output will withstand forward voltages of up to 20V (10V on 6V O/P) above rated output voltage. Reverse protection by diode clamp for currents up to 3A.
OTP Protection:	Output trips off for over-temperature.
OVP and OCPProtection:(PL-P models only)	Measure-and-compare over-voltage and over-current protection are implemented in firmware and can be set via the remote interfaces only.Output trips off for OVP and OCP. Setting resolution: 10mV and 1mA.Response time: typically 500ms.For manual operation (Local mode) OVP and OCP are fixed at 105% of the instrument range maximum.

METER SPECIFICATIONS

Display Type:	Dual 4-digit meters, 10mm (0·39") LED.
Voltage:	Resolution 10mV, 15/30/60V O/Ps; 1mV, 6V O/P.Accuracy ±(0·1% +10mV) 6/15/30/60V O/Ps.
Current:	Resolution 1mA; 0·1mA Low I range.Accuracy ± (0·3% + 3mA) to 3A, ± (0·5% + 3mA) to 6A;± (0·3% + 3mA) to 8A, ± (0·3% + 0·3mA) on Low I range, 6VO/P.
Current Meter Average:	Selects a 2s time constant (normally 20ms) for averaging of rapidly varying load currents.

ADDITIONAL SPECIFICATIONS - PL303QMD/PL303QMT QUAD-MODE DUAL Section

Independent Mode:	Each output is fully independent and isolated. Operation is equivalent to two single power supplies.
Tracking Mode:	The two outputs remain isolated but the Slave voltage controls are disabled and the Slave voltage is set equal to the Master voltage.
Tracking Accuracy:	Slave voltage = Master voltage ±(0.1% of Master voltage ±10mV).
Ratio (%) Tracking Mode:	As tracking but the Slave voltage controls set an output voltage between 0% and 101% of the Master voltage. Once set, varying the Master voltage will create the same percentage change in the Slave voltage setting.
Tracking Accuracy:	% change in Slave voltage = % change of Master voltage ± 0.1% ±10mV.
Parallel Mode:	The Master output operates as a single output power supply with twice the current capability (0.2mA to 6A). The Slave is disabled (and its displays are turned off).
Both On / Both Off:	Each output has an independent DC On/Off control; these additional keys can be used to turn both outputs on or off simultaneously. These keys operate in all four modes.

ANALOGUE REMOTE CONTROL (Single PL-P models only)

Non-isolated inputs and outputs to set voltage and current limit
Control input and output scaling:	Rear panel control inputs (CV and CC) permit external 0V to 5V or 0 to10V signals to set 0 to 100% of rated output voltage and current.Set values of 0 to 100% of rated output voltage and current generate 0 to 5V signals at the rear panel Vout and Iout outputs.These signals are referenced to the positive output.
Control input accuracy:	Voltage: 0.3% ±10mV. Input impedance 100kΩ; protected to 60V.Current: 0.5% ±5mA. Input impedance 64kΩ; protected to 60V.
Control output accuracy:	Voltage: 0.3% ±10mVCurrent: 0.5% ±5mA.Output impedance: 125Ω; output short-circuit protected.
Remote Off:	Rear panel socket allows a switch closure or logic low to turn output off.

DIGITAL INTERFACES (PL-P models only)

Full digital remote control facilities are available through the RS232, USB, LAN and GPIB interfaces.
Voltage Setting:	Resolution: 1mV; Accuracy: ± (0·05% + 5mV).
Voltage Readback:	Resolution: 1mV; Accuracy: ± (0·1% + 5mV).
Current Setting and Current Readback:	Resolution: 0.1mA; 0.01mA on Low I range, except 6V O/P: 1mA & 0.1mA. Accuracy: ± (0·3% + 3mA) to 3A, ± (0·5% + 3mA) to 6A, ± (0·3% + 0·3mA) Low I range, except 6V O/P: ± (0·3% + 3mA) to 8A and ± (0·3% + 0·3mA) on Low I range.
RS232:	Standard 9-pin D-connector. Baud rate 9600.
GPIB (optional):	Conforming with IEEE488.1 and IEEE488.2
USB:	Standard USB 2.0 hardware connection. Operates as a virtual COM port.
LAN:	Ethernet 100/10base-T hardware connection. 1.4 LXI Core 2011.
Remote Command Processing Time:	Typically <25ms between receiving the command terminator for a step voltage change at the instrument and the output voltage beginning to change.

GENERAL

AC Input:	230V AC or 115V AC ± 10%, 50/60Hz. Installation Category II
Power Consumption:	Single: 280VA max. Dual: 560VA max. Triple: 840VA 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 2.
Cooling:	Intelligent variable-speed low noise fan assists convection. Over-temperature trip shuts down output if internal temperatures exceed predetermined thresholds.
Safety:	Complies with EN61010-1
EMC:	Complies with EN61326-1
Size:(excluding feet, knobs and terminals)	Single: 107mm x 131mm (1⁄4 rack 3U) x 288mm L (PL-P: 343mm L), Dual: 214mm x 131mm (1⁄2 rack 3U) x 288mm L Triple: 321mm x 131mm (3⁄4 rack 3U) x 288mm L
Weight:	Single: 4·5kg (PL-P: 4.9kg); Dual: 8.5kg; Triple: 12.6kg

ANALOGUE REMOTE CONTROL (Single PL-P models only)

Non-isolated inputs and outputs to set voltage and current limit
Control input and output scaling:	Rear panel control inputs (CV and CC) permit external 0V to 5V or 0 to10V signals to set 0 to 100% of rated output voltage and current. Set values of 0 to 100% of rated output voltage and current generate 0 to 5V signals at the rear panel Vout and Iout outputs. These signals are referenced to the positive output.
Control input accuracy:	Voltage: 0.3% ±10mV. Input impedance 100kΩ; protected to 60V. Current: 0.5% ±5mA. Input impedance 64kΩ; protected to 60V.
Control output accuracy:	Voltage: 0.3% ±10mVCurrent: 0.5% ±5mA.Output impedance: 125Ω; output short-circuit protected.
Remote Off:	Rear panel socket allows a switch closure or logic low to turn output off.

DIGITAL INTERFACES (PL-P models only)

Full digital remote control facilities are available through the RS232, USB, LAN and GPIB interfaces.
Voltage Setting:	Resolution 1mV, Accuracy ± (0·05% + 5mV)
Voltage Readback:	Resolution 1mV, Accuracy ± (0·1% + 5mV)
Current Setting and Current Readback:	Resolution: 0.1mA; 0.01mA on Low I range, except 6V O/P: 1mA & 0.1mA.Accuracy: ± (0·3% + 3mA) to 3A, ± (0·5% + 3mA) to 6A, ± (0·3% + 0·3mA) Low I range, except 6V O/P: ± (0·3% + 3mA) to 8A and ± (0·3% + 0·3mA) on Low I range.
RS232:	Standard 9-pin D-connector. Baud rate 9600.
GPIB (optional):	Conforming with IEEE488.1 and IEEE488.2
USB:	Standard USB 2.0 hardware connection. Operates as a virtual COM port.
LAN:	Ethernet 100/10base-T hardware connection. 1.4 LXI Core 2011.
Remote Command Processing Time:	Typically <25ms between receiving the command terminator for a step voltage change at the instrument and the output voltage beginning to change.

GENERAL

AC Input:	230V AC or 115V AC ± 10%, 50/60Hz. Installation Category II
Power Consumption:	Single: 280VA max. Dual: 560VA max. Triple: 840VA 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 2.
Cooling:	Intelligent variable-speed low noise fan assists convection. Over-temperature trip shuts down output if internal temperatures exceed predetermined thresholds.
Safety:	Complies with EN61010-1 & EN61326-1.For details, request the EU Declaration of Conformity for this instrument via http://www.aimtti.com/support (serial no. needed).
Size:(excluding feet, knobs and terminals)	Single: 107mm x 131mm (1⁄4 rack 3U) x 288mm L (PL-P: 343mm L), excluding feet, knobs and terminals.Dual: 214mm x 131mm (1⁄2 rack 3U) x 288mm LTriple: 321mm x 131mm (3⁄4 rack 3U) x 288mm L
Weight:	Single: 4·5kg (PL-P: 4.9kg). Dual: 8.5kg. Triple: 12.6kg

Sicherheit

EINFACH

DOPPEL

DREIFACH

Source Handshake	SH1
Acceptor Handshake AH1
Talker T6
Listener L4
Service Request SR1
Remote Local	RL2
Parallel Poll PP1
Device Clear DC1
Device Trigger DT0
Controller C0
Electrical Interface	E2

bit 7 =	X Unbeachtet lassen
bit 6 =	1	Aktivierung der Parallelabfrage
bit 5 =	1
bit 4 =	0
bit 3 =	Sense	Wert des Antwortbits; 0 = low, 1 = high
bit 2 =	?	Bitposition der Antwort
bit 1 =	?
bit 0 =	?

Status Byte Register	= 0
Service Request Enable Register †	= 0
Standard Event Status Register	= 128 (nach Setzen des Bits)
Standard Event Status Enable Register †	= 0
Execution Error Register	= 0
Query Error Register	= 0
Parallel Poll Enable Register †	= 0

Thurlby Thandar Instruments Ltd.

Glebe Road • Huntingdon • Cambridgeshire • PE29 7DR • England (United Kingdom)

Telephone: [phone] • Fax: [phone]

International web site: www.aimtti.com • UK web site: www.aimtti.co.uk • USA web site: www.aimtti.us

Email: [e-mail]