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wingerr what came of the batteries? did they work after charging?

hkocznar 2020-06-17 09:08:44
I'm a bit torn in half, I ordered 2 of the 70 MHZ versions and they arrived in very short time. Bad #1: Though they both arrived with empty lithium cells, likely all 4 batteries are chemical damaged. I'll need to find out how badly. Bad #2: There is not even a single sheet if instructions, no precision sheet, no manual, no first use sheet nothing. What's the difficulty to sit down for a few hours and write up a short manual ?? Bad #3: I have bought many oscilloscopes from 30$ up to 2000$ and I've never in my life had an oscilloscope come with less probes than it has channels. This one comes with only one probe, I checked and it indeed is sold like that.. That doesn't make it better. Bad #4: In the middle of my first test it just shut down, losing all settings and configurations I made. It was hooked on USB power and I did not let it idle. I hope it's a one time thing and not a defect. Bad #5: The menus are not too intuitive, not a big problem and probably you can get used to it quickly. Those bad points summed up means the manufacturer neglects the device and it's customers in a way I don't like. If the manufacturer put a bit love into this product, delivered it with instructions, 2 probes and the batteries either blocked (a plastic strip) or not empty I'd give this solid 5 stars. The good news: #1 It feels like quality, it is heavy and seems durable. #2 I've tested the scope a little bit, while the controls are not very intuitive it seems working well. #3 The DMM multimeter menu is not the most intuitive one but it's fine #4 The DMM reacts quick and it seems to have great precision, better than my two 250$ multimeters here (tested only DC V). # The materials you receive are of good quality, the 2 BNC crokodile clamps are fine, the test leads are great and of very low resistance and the ONE probe seems to be of good quality either. Funfact: There was an instruction manual with the scope but it's for the probe. Finally: The price is very low: buy it
Yorumlar (2)

Q: can I use a 60Ah 400A Lead-Acid car battery with this?

Soran BG475501847 Açık 2020-10-06 05:14:05

wingerr sure can. that should be plenty of current for this

2020-10-06 05:18:29 Yararlı (1)
cevaplar (4)

wingerr maybe not regulated, and drops under load from the open circuit reading of 49V

2020-10-03 06:47:51 Yararlı (0)
cevaplar (2)

wingerr the transistors may have been damaged, or the gate control is damaged, causing the transistors to remain on. they should only be pulsed briefly when working.

2020-10-03 06:38:54 Yararlı (0)
cevaplar (2)

wingerr power supplies can't deliver enough current to do the welding, it needs a battery or a connection to a large enough capacitor to store a charge that can be delivered in a brief pulse.

2020-10-03 06:35:45 Yararlı (0)
cevaplar (4)

Q: How many amps can they store at 2.7 volts?

Soran Alien Affliction Cycles Açık 2020-03-20 10:48:06

wingerr measure the actual capacitance by starting with a discharged cap, and applying a constant 10A into it. 3000÷10 = 300 seconds, so it should show 1V after charging to for that 300 seconds, or 5 minutes. charge it to 2V, leaving it long enough to stabilize, and then use a constant current load of 10A, and measure how long it takes to discharge back to 1.0V. should be the same 5 minutes, if it's truly 3000F and not just a false claim.

2020-09-18 06:45:20 Yararlı (0)
cevaplar (2)

wingerr I got the same version you show, it doesn't allow repeated welds without having to reset and arm it first by pressing the button. not good if you need to make a large number of welds. it's okay if you only need to do a few.

Snappy 2020-08-17 03:04:48
Yorumlar (1)

Q: Are the batteries rechargeable?

Soran mascamagni Açık 2020-05-19 10:24:25

wingerr why is everyone saying 3000 farad? should just be 3000 micro Farad, which is more in the realm of reality-

2020-09-12 05:19:15 Yararlı (0)
cevaplar (7)

Q: How many welds per charge ??

Soran JayBee Açık 2020-05-14 07:50:18

wingerr how many pulses per weld? that would affect the welds per charge.

2020-09-12 05:14:40 Yararlı (1)
cevaplar (4)

Rhubarb the positive terminal in the tail and the negative in the front

2020-09-06 01:29:08 Yararlı (0)
cevaplar (1)