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Your cart is empty. Specifications:
Reference Voltage: 2.5V, 7.5V, 5V, 10V
Banana Socket Output: 4mm
Weight: 92g(approx.)
Package Includes:
1× Voltage Reference Module
Note:
1, Please check input battery charging voltage and do not with more than 5.5 volts DC. Please with a USB adapter.
2, Battery is NOT included.
W. O.
2025-09-01 18:53:19
The AD584KH is a solid voltage reference. I didn't expect lab-grade precision, and honestly, I wouldn't know how to measure it to that extent. I ran tests using several multimeters, and their readings were consistent with each other. As long as you manage your expectations, it proves to be a handy tool. I primarily use it as a reference point in my electronics projects, especially for tasks like calibrating voltage dividers in Arduino or Pi Pico projects. For these purposes, it's quite effective and convenient.One of the main perks is that it's ready to use straight out of the box, comes with free shipping, includes a battery, and performs reliably. Sure, building one yourself could be an engaging project, and I might even give it a go someday. However, if you occasionally need a reliable reference for your projects, this device meets the mark.It's decent for testing your multimeters but look elsewhere if you're aiming to calibrate them precisely.My unit arrived without a calibration certificate, which seems to be the new norm, though this wasn't mentioned in the product description. Contrary to what was stated, my package did include a battery. The acrylic case protector needs to be peeled off, which is slightly annoying but hardly a dealbreaker.For those interested, here are the measurements from my tests with various multimeters for comparison:Uni-T 61E+: 2.499V, 5.002V, 7.498V, 10.002VAneng AN8008: 2.498V, 5.002V, 7.497V, 10.00VAlosun EM3085A: 2.509V, 5.02V, 7.53V, 10.04VAstroAI DM6000AR: 2.503V, 5.012V, 7.50V, 10.01V
A. Que
2025-06-19 17:28:48
I checked my device with both an Agilent 34401A and Fluke 8845A, both 6½ digits DMM. My readings were as follow:2.49862 (error: -0.00138)4.99877 (error: -0.00123)7.49852 (error: -0.00148)9.97184 (error: -0.02816)There datasheet for the AD584KH says:2.500±0.00355.000±0.0067.500±0.00810.000±0.010So, for me, the 10 volts is out-of-spec by over double. However, all the voltages are fairly stable, drifting around 50 μV once warmed up. That is more than good enough to verify handheld DMMs which is my application.There are other devices that ship with the measured values written on a card. That would nice for people who don't have access to a calibrated DMM. Still, for the price I'm not going to complain too much.
Ken Jones
2025-05-11 12:45:04
The AD584KH is accurate to 0.1% voltage. This makes it close enough for my work. Measuring low voltages makes the accuracy in the range of resolution. Good enough for me.As for the battery, as you can see in my photo, there is one in mine. It was dead so I charged it using a micro USB. After a few minutes it was charged enough to light up to confirm the unit was working. I left it charging, but don't know how long it took to get to full charge.After charging, just turn it on and press the button to get the reference voltage you need.
scouser
2025-05-09 14:33:28
This is a very convenient device for calibrating the DC voltage scale on a multimeter. It is very easy to use and has a rechargeable inbuilt battery that holds the charge for 10 days ot more. The only deficiency is that it does not come with a certification for the 4 voltages it produces. This is not a problem for run of the mill applications of a multimeter but would not suffice for ultra precision work.
mason combs
2025-04-16 13:11:42
Dead on arrival
Kevin
2025-03-18 13:49:44
Saw previous reviews and bought the product noticed at some point they started shipping a different device but still kept reviews from a previous version bit of a bummer. At least update the product description. It does not hold a charge but can output a voltage that changes when you press the button.
js
2025-02-24 10:04:43
i wanted a way to compare my many multi-meters and this gave a way. I am only a hobbyist so dont need perfection but seems pretty darn accurate
Chris
2025-02-01 18:21:20
There is no reference measurement for the output voltages. It's not useful for any precision calibration without that. Unit works and is decently built.
JMB
2025-01-31 18:27:43
correcte dans ses spécifications
Agoo
2025-01-05 18:13:22
Funciona mejor de lo que esperaba. El error es mÃnimo (
Glen
2025-01-04 12:59:55
It has to be plugged, battery wasn't installed.
Customer
2024-12-31 12:15:05
Unfortunately I based my purchase on one of the comments that said there was a calibration report included with the unit but there were none and no instructions either although it is fairly intuitive. Since there is no calibration report I can't trust this to calibrate anything. I would not recommend buying this but rather buy one that has a calibration report.
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