Friday, January 04, 2013: Having a trusted power supply can drastically reduce concerns related to test and measurement. Modern day high performance supplies have replaced the old, large and heavy power supplies that comprised an analogue or a digital display with only three digits of resolution. Today’s advanced power supplies have built-in high accuracy measurement digitisers for capturing voltage and current, in parallel with measurement resolutions. This beats the measurement methods of the past. Hence, the user no longer has to deal with the complexity of setting up a measurement shunt with a digital multimeter or external digitiser. Modern power supplies have high speed output control loops for dealing with sudden output transients. To meet these unique power challenges, test and measurement vendors have now developed advanced application specific supplies.
Model: PSW 160V, Brand: GW Instek
Manufacturer: Good Will Instrument Co, Taiwan
In November 2012, Good Will Instrument Co launched its PSW series of programmable switching DC power supplies. It has launched nine models with the combination of 30 V, 80 V and 160 V rated voltages, with three output power capacities of 360 W, 720 W and 1080 W. Its multi-range feature allows flexible and efficient configuration of voltage and current within the rated power range. The PSW series can be connected in series for a maximum of two units or in a parallel voltage curve for a maximum of three units, to provide a higher capacity.
Key features
•Output voltage: 30 V/80 V; •Output power: 360 W-1080 W; •CC and CV priority selection enables the power current curve supply to prevent the damage of DUT, caused by inrush current; •Adjustable slew rate enables users to adjust the rise and fall time of the voltage and current in the voltage curve order to gain a faster response of the level change; •A bleed resistor provides a faster discharge path for battery applications; •The output on/off delay feature enables users to program the time delays of on/off for each power supply, in case multiple power supplies are used at the same time; •A 1/6 rack mount size, which is smaller and lighter, helps in saving rack space; •Multi-range operation
Contact details: Cindy Chen, overseas sales department; Ph: 2-2268-0389 ext 681; [email protected]; www.gwinstek.com
India office: Good Will Instrument Co, New Delhi
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Model: 2230-30-1, Brand: Keithley
Manufacturer: Keithley Instruments Inc, USA
In October 2012, Keithley (a Tektronix company) added dual and triple output versions to its 2200 family of precision power supplies. Being isolated (to 240 V), the outputs can be combined to reach 60 V or 3 A—with a special display mode showing total voltage or current —and each channel can be turned on or off independently; so the supplies can be used with circuits that need timed power sequences. Bipolar voltages (+/-30 V, for example) can be supplied, and tracking mode allows the outputs to maintain a user defined ratio. A programmable timer allows tests to run unattended, turning off the outputs after a specified interval. Remote sensing is possible, via rear panel connectors, and ripple is said to be lower than 3 mVp-p—these are all linear PSUs to keep noise low. Features provided to protect fragile or experimental loads from damage during testing include programmable voltage maximums to prevent the outputs accidentally being set too high. And all front panel controls can be locked using a user definable password to prevent changes during critical tests.
Key features
0.03 per cent basic voltage and 0.1 per cent basic current read back accuracy are claimed; •Two individually isolated 30 V 1.5A output channels, typically used for powering analogue circuits, plus a 6 V 5 A output, typically for powering digital circuits; •Voltage setting and reading resolution is 1 mV; •Current setting and reading resolution is 1 mA; •For automated testing, the TMC-compliant USB port allows control from a variety of programming environments; •For repeat tests, instrument settings can be saved to one of 30 internal memory locations, and a numeric keypad offers an alternative to the knob for entering output values
Contact details: Ph: (440) 248-0400; Toll-free: (800) 552-1115; [email protected]; www.keithley.com
India office: Keithley Instruments, Bengaluru
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Model: ODP3032, Brand: Owon
Manufacturer: Owon, China
In October 2012, Owon launched the ODP3032, a high performance 3 channel programmable linear DC power supply. It features up to 100 output groups with a configurable timer, high resolution LCD display, extremely clean ripple and noise, comprehensive over voltage, over current and over temperature protection, a user friendly interface and panel layout, and a variety of standard interfaces to meet diverse test requirements.
Key features
- Dual independent outputs with separate controls •Supplies up to 195 W total power;
•Two controllable channels with a switch for operation convenience;
•Highest output resolution: 1 mV/1 mA; Insulation between three output channels effectively reduces the interference;
•Outstanding line regulation rate: ≤0.01%+2 mV(voltage), ≤0.01%+1 mA(current);
•Low ripple noise:
Contact details: Metro Electronic Products; Ph: +91 11 23868195, 47508195, 23875355; [email protected]; www.metroQ.in
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Model: 1747, Brand: BK Precision
Manufacturer: B&K Precision Corp, USA
In August 2012, B&K Precision announced the addition of its Model 1747 dual range DC power source. Delivering up to 350 W of power with constant voltage (CV) and in constant current (CC) modes, Model 1747 can output either higher voltage at a lower current range (0-60 V, 5 A), or higher current at a lower voltage range (0-35 V, 10 A). This new DC power supply is suitable for a wide variety of uses in electronics manufacturing, service and repair, and in engineering labs. The design of dual range power supplies gives users operational flexibility within voltage and current ranges, depending on their application needs. This helps save both bench space and cost by eliminating the need for multiple power supplies on the bench or the purchase of more power than necessary.
Key features
It offers a sufficient increase in current range, yet maintains excellent regulation and low ripple characteristics; •Both voltage and current are adjustable with coarse and fine control knobs, while two bright 4-digit LED displays show the voltage and current; •Automatic recall of the supply’s last settings on power up, overload and reverse polarity protection are possible, and there is an addition of a convenient output on/off button; •An RS-232 interface on the rear enables the remote control of the instrument via PC, using software or remote commands.
Contact details: Ph: 714-921-9095; 800-462-9832 (US toll free); www.bkprecision.com
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Model: 4182, Brand: Scientech
Manufacturer: Scientech Technologies, India, Price: Rs 17,000 plus taxes
In May 2012, Scientech Technologies launched its 300 V, 1 A power supply designed as a constant current (CC) and constant voltage (CV) source for laboratories, industries and field testing applications. Featuring low power loss and a compact size, it provides floating, DC output voltages, and is ideally suitable for complex analogue and digital applications. The DC output can be continuously adjusted from 10 V–300 V with voltage variable control. The current limit is also adjustable. There is a digital display to read voltage and current values.
Key features
• Dual DC supply 32 V-2 amp • LCD screen for voltage and current • Current limit exceed protection • Step increment for voltage • User friendly settings of voltage and current • Keypad usage, cursor and encoder
• Constant voltage source and constant current source • 16×2 character LCD display • Ethernet standard USB port (optional)
Contact details: Ph:+91-731-4211100, [email protected]; www.ScientechWorld.com
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Model: N6700; Brand: Agilent
Manufacturer: Agilent Technologies; USA
Price: Starts from $1382—$4021
Launched in January 2012, Agilent offers a full line of DC and AC power supplies to meet test requirements. The power supplies family starts with high value basic power supplies and goes up to high performance products. N6700 modular power system family—7 new high power modules-up to 500 W.
The new modules expand the ability of test system integrators and R&D engineers to deliver multiple channels of high power to devices under test.
This gives engineers and integrators in the aerospace/defense, consumer electronics, computers and peripherals, communications, semiconductor, and automotive industries the flexibility to optimise performance, power and price to meet test needs.
Key features
• Fast output changes (0 to 50 V in less than 2 ms) that are up to 50 times faster than other programmable power supplies; • Advanced, fast digitised measurements that extend from milliamps to 50 amps; • Auto ranging output capabilities that enable one power supply to do the job of several traditional power supplies; • High speed test extensions that offer an oscilloscope like digitiser that simplifies system configuration and increases measurement accuracy; • With a single command, the ability to switch the output from a positive voltage to a negative voltage without changing wiring due to optional built-in polarity reversal relays
Contact details: Ph: +1 877-424-4536 (toll free)/ +1 408-345-8886; [email protected]; www.home.agilent.com
India office: Agilent Technologies India Pvt Ltd, New Delhi
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