QL355P SII - Power Supply Aim TTi - Free user manual and instructions

Product Type	Programmable DC Power Supply
Brand	Aim TTi
Model	QL355P SII
Output Voltage Range	0 – 35 V
Output Current Range	0 – 5 A
Maximum Output Power	360 W
Input Voltage	100 – 240 V AC, 50/60 Hz
Dimensions (W x H x D)	320 x 135 x 245 mm
Weight	Approx. 4.5 kg
Display Type	Dual 4-digit LED meters (voltage/current)
Programming Interface	RS-232, USB or GPIB (optional)
Operating Modes	Constant Voltage (CV) / Constant Current (CC)
Protection Features	Overvoltage (OVP), Overcurrent (OCP), Overtemperature (OTP)
Remote Sensing	Yes, up to 0.5 V lead compensation
Output Ripple & Noise	< 3 mVrms / < 5 mArms
Load Regulation	< 20 mV (voltage) / < 5 mA (current)
Line Regulation	< 10 mV (voltage) / < 2 mA (current)
Meter Accuracy	±(0.1% of reading + 3 digits)
Cooling	Variable speed fan
Cleaning	Wipe with dry, lint-free cloth; avoid solvents
Safety Standards	EN 61010-1, CE marked
Spare Parts / Repair	Fuses (see manual); contact Aim TTi service

Frequently Asked Questions - QL355P SII Aim TTi

How do I set a constant voltage output on the QL355P SII?

Press the V button, then use the rotary control or numeric keypad to set the desired voltage. Confirm by pressing Enter.

Can I control the power supply remotely via PC?

Yes, the QL355P SII supports RS-232 or optional USB/GPIB interfaces. Use the appropriate cable and software, such as Aim TTi's PowerFlex or custom commands.

What does OVP protection do and how do I set it?

Overvoltage Protection (OVP) shuts down the output if the voltage exceeds a set limit. To set OVP, press Shift then V, enter the trip voltage, and press Enter.

Why is my output current lower than the set value?

The power supply is in Constant Voltage (CV) mode; the load draws the current. Check that the load is properly connected and not in Constant Current (CC) mode. If in CC mode, increase the current limit or reduce load impedance.

How do I recall a saved setup?

The QL355P SII stores up to 10 memory locations. To recall, press Recall, then enter the memory number (0-9) and press Enter.

What maintenance does the power supply require?

Keep the unit clean and free of dust. Periodically check fan operation. No internal user-serviceable parts. If the unit fails, contact Aim TTi service.

Can I connect multiple units in series or parallel?

Yes, you can connect two QL355P units in series (up to 70V) or parallel (up to 10A). Use Master/Slave mode via the rear-panel interface.

What is the input voltage range?

The power supply accepts 100-240 V AC, 50/60 Hz. It automatically adapts to the line voltage.

How do I replace the output fuse?

Disconnect the mains. The output fuse is located on the rear panel. Use a 10 A / 250 V 5x20 mm glass fuse. Refer to the manual for exact type.

The display shows 'Err' or the unit beeps continuously. What should I do?

An error code indicates a fault. Common causes: output short circuit, over temperature, or incorrect calibration. Turn off the unit, disconnect the load, and restart. If persists, contact Aim TTi support.

USER MANUAL QL355P SII Aim TTi

AIM & THURLBY THANDAR INSTRUMENTS

Table of Contents

Specification 2

Sicherheit 5

Installation 6

Anschlüsse 7

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.

MAIN OUTPUTS

Voltage/Current Ranges:	QL355			QL564
0V to 35V/0·001A to 3A				0V to 56V/0·001A to 2A
	0V to 35V/0·1mA to 500mA			0V to 56V/0·1mA to 500mA
	0V to 15V/0·001A to 5A			0V to 25V/0·001A to 4A
Voltage Setting: Resolution 1mV
	Accuracy ± (0·03% + 5mV)
Current Setting: Resolution 1mA; 0·1mA on 500mA range
	Accuracy ± (0·2% + 5mA); ± (0·2% + 0·5mA) on 500mA range.
Output Mode:	Constant voltage or constant current with automatic cross-over. CI indicator lit in constant current mode.
Output Switch:	Electronic, non isolating. Switch illuminated when Output on. Preset voltage and current limit displayed when Output off.
Output Terminals:	Universal 4mm safety binding posts on 19mm (0·75") pitch for Output; screwless terminals for Sense. Duplicate rear panel Output and Sense screw terminals on P models.
Transient Response:	<50μs to within 15mV of set level for a change in load current from full load to half load or vice versa.
Voltage Programming Speed:	Maximum time required for output to settle within 1% of its total excursion (for resistive load). Excludes command processing time.
	QL355			QL564
	Full Load		No Load		Full Load	No Load
Up	15V 5A	6ms	6ms	25V/4A	10ms	6ms
	35V 3A	20ms	7ms	56V/2A	40ms	15ms
	35V 500mA	200ms	40ms	56V/500mA	300ms	60ms
Down	15V 5A	6ms	250ms	25V/4A	10ms	400ms
	35V 3A	25ms	600ms	56V/2A	50ms	800ms
	35V 500mA	120ms	600ms	56V/500mA	200ms	800ms
Ripple and Noise (20MHz bandwidth):	Normal mode voltage: <0·35mVrms and 2mVp-p
	Normal mode current: <0·2mArms; <20μArms on 500mA range.
Load Regulation:	For any load change, measured at the output terminals, using remote sense. Voltage <0·01% + 2mV. Current <0·01% + 250μA; <0.01% +50μA on 500mA range. Add typically 2·5mV for a 0·5V drop in the positive output lead. Specification applies for sense lead resistance <0·5Ω.
Line Regulation:	Voltage <0·01% + 2mV for 10% line change. Current <0·01% + 250μA; <0.01%+ 50μA on 500mA range.
Temperature Coefficient:	Voltage: typically < (50ppm + 0·5mV)/°C Current: typically < (100ppm + 1mA)/°C; typically < (100ppm + 0·1mA)/°C on 500mA range.

Output Protection: Output will withstand forward voltages of up to 20V above rated output voltage. Reverse protection by diode clamp for currents up to 3A.

Over-voltage Protection: Range 1V to 40V (QL355), 1V to 60V (QL564) (OVP) Resolution 0·1V; accuracy ± (2% + 0·5V) Response time typically 100μs

Over-current Protection: Range 0·01A to 5·5A (QL355), 0·01A to 4·4A (QL564) (OCP) Resolution 0·01A; accuracy ± (0·2% + 0·01A) Response time typically 35ms

Protection Functions: Output trips off for OVP, OCP, over-temperature and Sense miswiring

METER SPECIFICATIONS (Main Outputs)

Display Type:	5-digit (Volts), 4-digit (Amps), 14mm (0·56") LED.
Voltage (CI mode): Resolution 10mV
	Accuracy ± (0·1% of reading + 10mV)
Current (CV mode):	Resolution 0·001A; 0·1mA on 500mA range
	Accuracy ± (0·2% + 0·005A); ± (0·2% + 0·5mA) on 500mA range
V x A:	Resolution 0·01W; 0·001W on 500mA range
	Accuracy ± (0·3% + 0·05W); ± (0·3% + 0·005W) on 500mA range

AUXILIARY OUTPUT (T models only)

Voltage Range:	1V to 6V
Voltage Setting:	Resolution: 10mVAccuracy: ± 0.5% ±10mV
Current Limit:	3A minimum
Output Switch:	Electronic, non isolating. Switch illuminated when Output on.
Output Terminals:	Universal 4mm safety binding posts on 19mm (0·75") pitch. Duplicate screwless terminals on rear panel.
Output Protection:	Output will withstand up to 16V forward voltage. Diode clamp reverse protection for currents up to 1A. Over-current trip.
Ripple & Noise:(20MHz bandwidth)	<2mV rms, 10mVp-p
Load & Line Regulation:	<1·0% for a 90% load change; 0·1% for a 10% line change.
Status Indication:	Current limit lamp. Current overload trip indication.
Meter Specifications:(use SET/VIEW button)	Voltage Meter: Resolution 10mV, accuracy ± 0.5% ±10mVCurrent Meter: Resolution 10mA, accuracy ± 0.5% ±10mA
Voltage Programming Speed:	Maximum time required for output to settle within 1% of its total excursion (for resistive load). Excludes command processing time.1V to 6V: 10ms, no load and full load6V to 1V: 10ms, no load and full load

KEYBOARD & ROTARY CONTROL

All functions, including the selection and set-up of the remote control interfaces, can be set from the keyboard. The rotary jog control can be used to adjust output voltage and current settings in a quasi-analogue mode.

ALARM OUTPUT

Isolated rear-panel open-collector output signal. User can select output to be activated for either OVP, OCP, Overtemperature or Sense miswiring, or for any of those four faults.

DIGITAL INTERFACES (P models only)

Full digital remote control facilities are available through the RS232, USB, LAN and GPIB interfaces.

General

RS232:	Standard 9-pin D-connector. Variable Baud rate (600 to 19200).
GPIB:	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.
Status Indication:	Remote mode and LAN status indicators

Main Outputs

Voltage Setting:	16-bit; Resolution 1mV, accuracy ± (0·03% +5mV)
Current Setting:	16-bit; Resolution 0.1mA, accuracy ± (0·2% + 5mA)Resolution 0.01mA, Accuracy ± (0·2% + 0·5mA) on 500mA range.
Readback V & I	See meter specifications.

Auxiliary Output (T models only)

Voltage Setting:	Resolution 10mV, accuracy ± 0.5% ±10mV
Current Setting:	Resolution 10mA, accuracy ± 0.5% ±10mA
Readback V & I	See meter specifications

GENERAL

AC Input: 230V AC or 115V AC ± 10%, 50/60Hz
	Installation Category II
Power Consumption:	Single output: 250VA max; Triple output: 500VA 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 fan. Over-temperature trip shuts down output if internal temperatures exceed predetermined thresholds.
Store/Recall:	Up to 50 set-ups each main output, 50 linked set-ups, and 10 auxiliary output settings can be saved and recalled via the keyboard or remote interfaces.
Safety & EMC:	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:	Single output: 140 x 160 x 290mm (WxHxD), excl. feet & terminals.Triple output: 280 x 160 x 290mm (WxHxD), excl. feet & terminals
Weight:	Single: 5.5kg; Triple: 10·5kg

Sicherheit

Limit Event Status Register 1

Limit Event Status Register 2

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 (Ausführungsfehlerregister)	= 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

Email: [e-mail]