I had an old 1975 vintage analogue DC meter. It was damaged by battery leakage, so I researched digital multimeters. I chose the AstroAI and promptly burned out one of the two fuses trying to measure my car battery's DC voltage because I connected the red lead incorrectly. I was used to only 2 jacks, this multimeter has 4 input jacks. A small paper User Manual is included, but for an old man it was hard to make out the even smaller images. Downloading the .pdf version of the User Manual from AstroAI.com solved that problem.
I recognized MY mistake and connected the red lead correctly, and it worked just fine. I also measured AC voltage successfully. The fuse was not protecting those functions. I contacted AstroAI Support and was amazed at how quickly they responded with 鶹 links to replacement fuses. I replaced the fuse, and all is good.
I am really impressed by the tremendous functionality of this multimeter and the nice case that it comes with. It is exquisitely designed and almost foolproof. It has a Smart function which simplifies many of the measurements that it can take. It has a rugged plastic guard around it to protect it from falls and other mishaps.
It is easy to change fuses and batteries. It comes with a spare set of three AAA batteries. The display is clear, and it appears to be very accurate. Overall, I highly recommend this product if you want a capable digital multimeter with good support.
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Product Description
AstroAI Digital Multimeter Series
 AstroAI Smart Multimeter |  AstroAI Clamp Meter 4000 |  AstroAI Clamp Meter 6000 |  AstroAI Multimeter 4000 |  AstroAI Multimeter 6000 |  AstroAI Multimeter 4000 |  AstroAI Multimeter 2000 | |
|---|---|---|---|---|---|---|---|
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Customer Reviews
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1,273
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9,200
|
9,200
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5,658
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18,130
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7,508
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47,230
|
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AC/DC Voltage
| AC 750v / DC 1000v | AC 600v / DC 600v | AC 750v / DC 1000v | AC 600v / DC 600v | AC 750v / DC 1000v | AC 600v / DC 600v | AC 500v / DC 500v |
|
AC/DC Current
| ✔ | ✔ | 1000 A AC/DC | ✔ | ✔ | ✔ | Only DC Current |
|
Maximum Display
| 10000 Counts | 4000 Counts | 6000 Counts | 4000 Counts | 6000 Counts | 4000 Counts | 2000 Counts |
|
Range Selection
| Manual and Auto | Manual and Auto | Manual and Auto | Manual and Auto | Manual and Auto | Manual and Auto | Manual |
|
Resistance/Continuity
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
|
Capacitance/Frequency
| ✔ | ✔ | ✔ | Only Capacitance | ✔ | Only Capacitance | ✘ |
|
Diode
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
|
Temperature
| ✔ | ✘ | ✔ | ✘ | ✔ | ✘ | ✘ |
|
NCV Detection
| ✔ | ✔ | ✔ | ✔ | ✘ | ✔ | ✘ |
|
True RMS
| ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✘ |
|
Inrush
| ✘ | ✘ | ✔ | ✘ | ✘ | ✘ | ✘ |
