DC Bench Power Supply Variable, 3-Digital LED Display 30V 10A Switching Power Supply with Free Alligator Clip US Power Cord for Lab Equipment, DIY Tool, Repair
|Minimum Input Voltage||110 Volts|
About this item
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- DC Bench Power Supply Regulated Adjustable: 0-30 volts and 0-10 amp outputs; the Back-lit 3-digit LED Display accuracy: 0.1 V and 0.01A
- Featuring a high accuracy, reliability and perfect limit current protection, thermal protection, voltage overload protection, short-circuit protection. A grounding port designed onto the device for much more stable and secure protections.
- Intelligent Temperature Control: It's built-in cooling fan with thermo-sensor will keep the power supply cool, noise reduced and life prolonged.
- Comes with 1pc 4mm Alligator Clip Leads with Banana Plug, 1pc Input Power Cord. Great choice for using in home, labs, and schools,repairing workshops etc.
- We provide 30-day free-returned, and 36-month warranty and lifetime support for you!
|Minimum Input Voltage||110.0 volts|
|Size||30V 10A 3-Digital|
|Style||30V 10A 3-Digital|
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Naweisz DC Power Supply Variable is small-sized and lightweight, features high accuracy, reliability. It is a great tool for scientific research, product development, etc.
Bright Green Led Display
Precision and accurate with 3 digit display reaches to 100mv,10mA that easy to read.
Coarse and fine adjustments knob designed ,and easy for you to adjust your desired value.
Compact Design & Lightweight
It's designed in small size 226*82*138mm, and weight only about 2.95lb. very easy to carry .
- High quality circuit board and fine workmanship make the DC power supply stable and high reliably.
- It's built-in cooling fan with thermo-sensor and TWO heat sinks used will keep the power supply cool,noise reduced and life prolonged.Perfect limit current protection, thermal protection, voltage overload protection, short-circuit protection.
|Input voltage||110VAC±10% 60Hz|
|Display resolution: voltage||0.1V, current 0.01A|
|Operating environment||32 - 104°F (0 - 40°C), and humidity: ≤80%|
|Storage environment||temperature 14°F-158°F(-10°C~70°C), and humidity: ≤80%|
|Bench Power Supply 30V 5A||Bench Power Supply 60V 5A||DC Power Supply 30V 10A||Led Display Tube||Test Lead of Banana Plugs to Alligator Clips|
|Output Current||0-5A||0-5A||0-10A||/||Length: 1 meter|
|Display Mode||3-Digital LED Display||3-Digital LED Display||4-Digital LED Display||3&4-Digital LED Display||/|
|Display Resolution||Voltage: 0.1V / Current 0.01A||Voltage: 0.1V / Current 0.01A||Voltage: 0.01V / Current 0.001A||✓||/|
Product detailsStyle:30V 10A 3-Digital
- Is Discontinued By Manufacturer : No
- Package Dimensions : 11.73 x 7.44 x 5.04 inches; 3.61 Pounds
- Item model number : NP3010
- Date First Available : September 24, 2018
- Manufacturer : NaviTech
- ASIN : B07J6PQ2GQ
Best Sellers Rank:
#2,025 in Computer Power Supplies
- Customer Reviews:
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Low voltage and low current setting control is good. Turn coarse voltage or current all the way to zero when needing low values.
Voltage adjustment: With coarse voltage = 0V, fine adjusts from 0.00V to 3.55V, with 0.01V precision
Current adjustment: With coarse current = 0A, fine adjusts from 0.000A to 0.958A, with 0.001A precision
Meter accuracy (Agilent 34411A 6-1/2 digit multimeter used for these measurements)
0.100A 0.0896A (25ohm load)
0.500A 0.4885A (25ohm load)
1.000A 0.9715A (0ohm load)
2.000A 1.9505A (0ohm load)
3.000A 2.9307A (0ohm load)
5.000A 4.8940A (0ohm load)
10.00A 9.82222A (0ohm load)
10.18A 10.0002A (0ohm load)
Power supply noise (Tektronix MDO4104B digital oscilloscope with 20MHz bandwidth limit enabled for these measurements)
50.2mV peak-peak, 2.45mVrms (25ohm load at 12V, DC-20MHz, 100Meg samples/sec)
26.3kHz time domain switching peaks
6.02MHz and 14.1MHz frequency domain peaks
Startup Transient Response
9.3ms 10-90% rise time from cold turn on 0 - 12V into 25 ohm load
21.5ms settling time to within 50mV of 12V (25ohm load)
19.8ms settling time to within 50mV of 12V (no load)
No overshoot in either case.
Note: Current limit must be set high enough to remain in voltage mode. If not, I did see 0.58V overshoot on the 12V startup transient.
Shutdown Transient Response
89ms 12V to 0.5V into 25 ohm load
6.00s 12V to 0.5V into no load
Shutdown transient response depends upon the load, and if there's no load, can take 6 seconds from only 12V.
Front panel binding posts lack a center hole to thread heavy gauge wire through. Wire tends to slide off the binding posts even when tight. If you bend the wire in a half circle the diameter of the binding post, it holds better. This is the weakest feature of this power supply.
Current metering accuracy is pretty bad at low currents, 10% error at 0.100A current set.
Besides the two above negative points, the rest of the power supply performs very well for a switcher. I really like how small and lightweight it is.
I'm using it for power input to a 3-phase stepper controller to drive a brushless DC motor, power for a 12V air mattress blower, power for a 12V compressor to pump air for car tires, and power for charging sealed lead-acid batteries on replacement UPS (uninterruptible power supply) batteries.
When charging the valve regulated sealed lead-acid batteries, I use 14.2V with a current limit of 1A. The changeover from 1A current limit to 14.2V voltage limit is smooth as the current drops to less than 50mA @ 14.2V when fully charged.
- The potentiometers are touchy. Even the the "fine" know feels way too touchy when you get the 4 digit unit. I would have liked muti-turn knobs a lot better, but to be honest, the knobs are OK, just not perfect.
- The fan speed is proportional to the current drawn, not how hot the power supply is. This is weird, but hey, it's a pretty small con.
- Depending on how clean of a power supply you need and how quick of a reaction you need, this PS may not be ideal for you. I haven't tried it on radio equipment yet, but there are a few tens of millivolts of noise and the output capacitors are fairly large so the transition from CV to CC is relatively small and may burn current-sensitive components like LEDs if you set your voltage too high and count on the CC to save you.
And now for the PROS...
- This power supply does pretty much what it needs to do and at $120 for the 300W 4 digit version, it is definitely worth it. I have charged lead acid batteries, excited alternators, and run digital electronics at all sorts of voltages and current levels for long hours and the power supply keeps going and doesn't get hot. The current and voltage displays are very close to my Fluke 87 and someday I will calibrate both to get even more confidence out of the reading. You don't really need the 4-th digit as the accuracy is not that great, but I find it convenient to have for not that much extra $
The form-factor of this PS is amazing. It is tiny, light and convenient. I don't know how to praise it more.... All I can say is: If you're in the market for a mid-range bench power supply and if you can afford this, definitely get this on. I needed the 60V option where the offerings are more limited and this product fit my bill and needs perfectly. I would have payed a little more for a 10A version if one was available and as nice as this one.
I have attached several photos of the NaviTech DC power supply I received from Amazon. Since then I have also bought another DC power supply made by HANMATEK (the blue one in the photos). You can see the display brightness comparisons.
Unfortunately, I can't get the order of the photos to match the description - because they change from the order that they are uploaded in. All photos are from an iPhone 7+. You'l just have to sort them from their verbal descriptions:
1. The close up of the NaviTek from two inches.
2. The photo with tape measure is taken from eight inches.
3. The photo of the Navitech showing a well lit LED display is from the Amazon ad for Navitech - which does represent my Navitech LED screen brightness at all.
4.. Side by side comparison of the NaviTech and the HANMATEK display's readability. The HANMATEK screen is easily readable in my daylight conditions.
The unit is very light and economically manufactured. It works and the price is attractive.
The binder posts are so shallow that it will not take a standard length banana plug. Would recommend replacing the banana binding posts to make them more useful also there is no cross drilled hole to hold wire in the binding post mode.
Bind post will not take standard banana plug and no cross hole.
LED display is not very bright and hard to read.
The coarse knob is overly course and the fine is not so fine.