Did you miss my link above? Welectron is located in Germany, so no customs fees.
First- try to find the one meter close to a battery Voltage( few examples in this thread) Next post the innards of that meter with showing what is the deviation from battery voltage. if the deviation is within acceptable percentage- you need not even calibrate. Cheapest Fluke new Basic 101 DMM has an accuracy of 0.5% DC Volt- costs around 60$ new. If you look at Fluke 87 has 0.05% DC Volt- legendary DMM. Based on the simple battery test you will know what to do next! If it does not meet 0.5% accuracy, my suggestion is to throw them out. I will confidently buy an used Fluke 87 and trust it.
I actually possess 2 Fluke 867 because it also shows me waveform while trouble shooting audio circuits but expensive. I also use HP 34401 if i need accuracy.
I actually possess 2 Fluke 867 because it also shows me waveform while trouble shooting audio circuits but expensive. I also use HP 34401 if i need accuracy.
I think 0.1 V difference on the 50 or 20V scale does not matter in hobby or initial troubleshooting use.
And you can get that much variation due to battery voltage and temperature.
How many of you are using the more voltage stable Alkaline and Lithium batteries in your meter?
How many meters use a TL431 or similar reference built in?
How many are in constant temperature environment?
Get real guys...and ladies.
And you can get that much variation due to battery voltage and temperature.
How many of you are using the more voltage stable Alkaline and Lithium batteries in your meter?
How many meters use a TL431 or similar reference built in?
How many are in constant temperature environment?
Get real guys...and ladies.
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0.5% of your ball park 50 V is 0.25V - who said you need more accuracy than that general trouble shooting ?
There is info about on the higher performance 61E model if you google, but that may not help - but perhaps look through :
Multimeters (DMM) and their chips, with computer communication
It appears your meter has 6xxx Vdc ranges, so best to do an absolute voltage calibration/comparison as close to 6V as possible (ie. the 5V level on the ebay unit).
Multimeters (DMM) and their chips, with computer communication
It appears your meter has 6xxx Vdc ranges, so best to do an absolute voltage calibration/comparison as close to 6V as possible (ie. the 5V level on the ebay unit).
Right now my economy situation is so that I ordered this one:
R04 Voltage Reference AD584 Voltage Reference Voltage Reference|Air Conditioner Parts| - AliExpress
The L gear
R04 Voltage Reference AD584 Voltage Reference Voltage Reference|Air Conditioner Parts| - AliExpress
The L gear
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Sorry no. Anyway, their prices were way too high, in the end I decided to use US for integrating inductance option on mine.
Should they offer a reasonably priced recalibration, sure, why not?
I bought DMMCheck plus some time ago, shipping was not that expensive at time time, possibly even skipped customs.
Now is different.
I would be vary of low cost Chinese references, this one gets properly "aged" and receive a certificate. Sure it is not NIST traceable blah blah, still good enough.
We should encourage a club purchase (for example, me being a ham for my local ARI club in Milan) it is not something everybody should buy, just have access to it when needed.
Giuseppe Marullo
IW2JWW - JN45RQ