|Item Weight||0.635 ounces|
|Product Dimensions||6.14 x 3.78 x 2.28 inches|
|Is Discontinued By Manufacturer||No|
|Color||150W USB Load|
MakerHawk Electronic Load Tester USB Load Tester 150W 200V 20A Resistor Adjustable Constant Current Battery Capacity Tester Module Intelligent Discharge Resistance Power Tester
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- Guide Video: https://youtu.be/56ldIUjyqng.
- Voltage measurement range: 0.00V ~ 200V, Current measurement range: 0.00A ~ 20A.
- How to operate: Set the capacity, power, time using the Keystrokes method Reset:1. Reset button Long all data (mAh, Klitschko, 00: 00: 00); 2. Fast button twice capacity reset (mAh); 3. Fast button three power reset (ㅁ);4. Fast button Four time reset (00:00:00); 5. Fast button five settings auto standby, Discharge count down regularly; 6. No load output No load, fast seven key, And current zero zero current, Environmental temperature Accurate calibration.
- 150W power refers to: In accordance with the power calculation formula P = UI (power = voltage x current); 10V input Approximately 18A discharge current 20V input Approximately 9A discharge current 30V input Approximately 6A discharge current.
- Two power supply methods: 1. DC6-12V DC5.0 power supply; 2. DC6-12V Micro USB power supply.
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USB Load Tester 150W 200V 20A Resistor Adjustable Constant Current Electronic Load Tester Battery Capacity Tester Module Intelligent Discharge Resistance Power Tester
Input Interface / Output Interface: 100A High Current Bite Screw Stud
Voltage measurement range: 0.00V ~ 200V, resolution accuracy: 0.01V
Current measurement range: 0.00A ~ 20A, resolution accuracy: 0.01A
Capacity accumulation range: 0 ~ 999.999Ah, resolution accuracy: 0.01Ah
Power accumulation range: 0 ~ 9999.9Wh, resolution accuracy: 0.01Wh
Power measurement range: 0000.00 ~ 150W, resolution accuracy: 0.01W
Impedance measurement range: 1 ~ 999.9 Europe, resolution accuracy: 0.01 Europe
Temperature measurement range: 0 ~ 99 ℃, resolution accuracy: 1 ℃
Timing maximum time: 999 hours 59 minutes 59 seconds, resolution accuracy: 1 second
Refresh time: > 500mS / times
Measurement rate: about 0.5 times / sec
Overvoltage overcurrent set the alarm mode: show alert interface to remind the user
Overpressure reminder setting range: 1 ~ 200V
Low voltage reminder setting range: 0 ~ 190V
Overflow reminder set range: 0.2 ~ 100A
Product size: 156mm * 96mm * 58mm
Operating temperature: -10 ~ +60 ℃
Working humidity: 10 ~ 80 (no doubt)
Working pressure: 80 ~ 106kPa
Exceeding the specified power will burn the product.
The USB function of this load meter is to connect the trigger equipment
The current cannot be adjusted via USB, and it is adjusted by the knob on the load meter
1 * 150W USB Adjustable Constant Current Load Tester
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- Slightly misleading on the advertisement for 20A. The spec you want to go by on this unit is the wattage rating. With this design and heatsink, it is rated at 150W. So you must divide wattage by your batteries voltage to get the peak amperage discharge you should aim for. Example, if I have a 14.6V battery.... 150/14.6=10.27A (10.27A is the max you would set discharge to). The only time you would discharge a full 20A advertized is if the pack was at 7.5V.
- I have found the unit to be sufficiently accurate to .1V. The low voltage cutoff I purchase on the other hand is off by 200mV. As long as you test and know the offset, you are fine. Just take in account the difference
- Display is large and easy to read
- I find the single button programming easy to use. Just takes some playing with
- Mosfet is rated to 50A on this unit. If modified, this could be nearly a 300W meter. Just add a CPU water cooler. A big CPU heatsink I think would risk breaking this PCB as it is a thin
My only complaints....
- No chassis, but I made one
- Needs slightly thicker FR4 (pcb thickness)
- Seriously, why only have a low voltage alarm? Add in a cutoff relay. People would pay extra for a low voltage cutoff integrated as I have with this chassis. Not just an output terminal.
- Potentiometers are CHEAP. Wish it used better pots but at this price... hard to complain!
- Layout of the PCB is poor. Functional but not chassis friendly. Seems they had the cheap feet in mind when making it as the mounting holes for the feet are placed like someone was throwing darts
Taking a step back... for $45 this is a heck of a functional bit of kit. The price makes it EASY to overlook some of my complaints. Can it be a lot better? YES. But it is what it is and I am happy with the buy. I would buy again. Does exactly what I want it to do.
The load is relatively simple to use but the user interface is awkward as everything is controlled with a single button. The actual load current is adjusted via analog potentiometers, and the digital display is only used to monitor the current and not to control it, so the adjustment is very sensitive. Although the MCU knows when the power level is too high, it will not shut it off to prevent damage to the unit.
I bought this to help calibrate a power supply but unfortunately the load is not stable enough and the current constantly fluctuates by at least 20mA (at 5A load) so it is impossible to get a stable reading. As the unit heats up the current also drifts. Therefore it is useless for my application.
The user interface is a little cumbersome, but workable. You have to cycle through menus with only 2 buttons. Double click for one feature, triple click for another, etc. But once you set it up, it's good to go for basic testing.
I liked how it kept the usage statistic through power cycles. The timers and counters were retained when removing power from the test set.
A couple wishes:
-- I wish it had separate voltage sense wires. The DC voltage drop, even with #10 AWG, when drawing 10 amps is significant. That made the voltage readings at the load not match what is at the battery terminals. With some minor rework, I would think optional voltage sense leads would be feasible.
-- Add a couple more buttons to help navigating the user interface. Get away from 2x and 3x clicking to accomplish a feature or setting.
-- Add data logging capabilities via USB
-- Add some hysteresis to the voltage turn off setting. I found that when testing a battery, I'd hit the shut down voltage...then it'd start applying the load again...then hit the voltage limit...then it'd start applying the load again. Or consider that once you hit the low voltage point - the load permanently disconnects.
Some room for improvement - but excellent for what it is. I'm pleased!
I like that everything is on one screen. You can choose which layout you like best. There are so many different ways to power and load this tester that I’m sure I’ll have a hard time finding something that I can’t use it for. My daughter and I are going to have a lot of fun finding ways to use this. This is going to be a permanent fixture in my ham shack/shop.
The cooling fins are very thin. Be careful when removing the power supply box from the vacuform box. I accidentally bent the fans into the blade and didn’t notice until I saw them. They’re easily straightened out though and nothing was damaged. SHEW
I would like to see some protection over the fan. Accidentally dropping something into the blades or bumping them when reaching for something wouldn’t be a pretty site. Nothing a 3D printer can’t solve.