Reed R5001 LCR meter - Page 1
Forum section: electronics / general

author: The Electrician
author_rank: Frequent Contributor
timestamp: February 24, 2012, 07:25:58 am
content: Here's an LCR meter I haven't seen before:http://www.ebay.com/itm/LCR-Meter-Inductance-Resistance-New-R5001-REED-Instruments-Must-SEE-/320854365752?pt=BI_Electrical_Equipment_Tools&hash=item4ab4691638It's Canadian, and it isn't clear if it really can test at 100 kHz (look carefully at the data sheet on that page), but if it can, a price of $206 is a bargain with .2% accuracy.Does anyone know any more about it?

author: flolic
author_rank: Frequent Contributor
timestamp: February 24, 2012, 09:27:50 am
content: Seems like good device.But it has warning not to connect voltagelessthan 30V to input terminals

author: EEVblog
author_rank: Unknown
timestamp: February 24, 2012, 09:59:14 am
content: The 4 terminal banana plugs are nice.Lack of blade terminals makes it not as useful as most other though.Dave.

author: kripton2035
author_rank: Super Contributor
timestamp: February 24, 2012, 10:03:00 am
content: for me it appears as a 10khz max device ...may be it has a frequency generator that can output 100khz (what for appart give trouble to customer???)

author: DEHiCKA
author_rank: Contributor
timestamp: February 24, 2012, 09:32:46 pm
content: Looks like russian rebranded LCR I mentioned earlier in the other thread:https://www.eevblog.com/forum/product-reviews-photos-and-discussion/damnit-help-choose-lcr-meter-torn-between-the-two/msg57227/#msg57227But AMM-3035 is not .2%

author: The Electrician
author_rank: Frequent Contributor
timestamp: February 25, 2012, 08:05:26 am
content: There a number of similarities and some peculiarities. The Aktakom says it uses 4 alkaline batteries, but under accessories, they offer a box of 6 batteries. The Reed says it uses 6 batteries.The measuring ranges of the Aktakom are identical to the Reed.The Aktakom appears to have blade terminals, but otherwise the layout is identical to the Reed.I wonder if the Reed folks are lying about their accuracy?

author: DEHiCKA
author_rank: Contributor
timestamp: February 25, 2012, 08:32:10 pm
content: Huh, look at the Aktakom pdf manual, there is a picture without blade terminals

author: rbola35618
author_rank: Frequent Contributor
timestamp: February 26, 2012, 01:43:02 am
content: This is the same as the Aktakom. If it is, then you should all know that the Aktakom has a problem with the calibration mode. If you connect test tweezers or any test leads and if their capacitance is more than 25 picofarads, the LCR meter will not Zero or null the meter. The open calibration will not zero out. I have a video that I sent the vendor.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 12, 2013, 07:27:27 pm
content: Sorry for revamping an old thread, but it is an actual update to the original discussion.I just got this meter as a birthday gift and posted my impressions atAmazon.I soon plan to add a more thorough review here, but in advance I can tell it seems to be a very good meter. Please check some pictures below - somehow no other picture on the web of the Reed R5001 shows the correct meter with the blade leads and the correct warning message (and not the ridiculous message saying not to connect anything with less than 30V to the leads)BTW, contrary to what is shown in the video above, there is nothing wrong with the calibration procedure - the manual says explicitly not to connect anything to the terminals during the open calibration. The only "sin" is the meter does not have a "tare" button where it nulls the effects of the leads (that is the original feature rbola35618 above would like - and I would too).To workaround the added capacitance of the leads, simply use the blade terminals instead.

author: Unknown
author_rank: Unknown
timestamp: April 12, 2013, 07:40:46 pm
content: Quote from: rsjsouza on April 12, 2013, 07:27:27 pmThat makes the calibration quite useless if you use some sort of fixture. Given that other meters using the same Cyrustek IC can calibrate with leads just fine, my guess is that the supplied leads short the sense and source terminals. Calibration would probably work fine with real kelvin leads, like the blade terminal kind that several other manufacturers ship.Quote from: rsjsouza on April 12, 2013, 07:27:27 pmExplain to me how this helps measuring a low value 0805 SMT cap?

author: Wytnucls
author_rank: Super Contributor
timestamp: April 12, 2013, 07:50:26 pm
content: This is the rebadged C.E.M DT-9935.It is possible to calibrate for short test leads with croc clips, if they have a low resistance. The provided tweezers' impedance is too high for calibration. The blades are only good for 2-wire measurements.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 12, 2013, 09:04:29 pm
content: Quote from: alm on April 12, 2013, 07:40:46 pmYou are right. But that is why in my post I wish it had a relative or "tare" mode. I don't think the word "calibration" should be used in this meter, which is also loosely used in some discussions about several other LCR meters. To me this word has a heavier and more serious meaning, such as verifying/adjusting the accuracy of the equipment relative to a given reference. In this case, as I mention in my post, a relative mode would be nice (to remove any residual measurements by the leads, environment, etc.)Quote from: alm on April 12, 2013, 07:40:46 pmWell, what's up with these damn SMD components and their short leads?!? (I actually haven't thought of that)Quote from: Wytnucls on April 12, 2013, 07:50:26 pmThanks for the tip, I guess there is already a very nice review atthis other thread

author: Wytnucls
author_rank: Super Contributor
timestamp: April 12, 2013, 09:10:44 pm
content: Actually, today I managed to calibrate the CEM DT-9935 meter using the 3-wire SMD tweezers that were provided with my UNI-T UT612 LCR meter. It is reading 0.1pF at 1KHz, instead of 25pF with no calibration.

author: rsjsouza
author_rank: Super Contributor
timestamp: April 12, 2013, 09:27:13 pm
content: Beautiful! I guess there is hope then...

author: Wytnucls
author_rank: Super Contributor
timestamp: April 12, 2013, 09:37:16 pm
content: Yes, it looks like the guard connection makes the difference. If you can find tweezers with a guard lead, you should be able to calibrate your meter too.With the tweezers closed, the meter on Rs 1 KHz selection, reads 0.007 Ohm and 0.12 Ohm on DCR.I can't remember where I read this, but apparently the impedance should be more than 9.5MOhm in 'Open' mode and less than 1.1Ohm in the 'Short' mode, for a successful calibration.Also, like I mentioned in the other thread, APO (Auto Power Off) works fine. The soft button has to be tapped rapidly to make the selection. There is no feedback beep on selection.

author: Hydrawerk
author_rank: Super Contributor
timestamp: April 12, 2013, 09:57:03 pm
content: I also have this cheap LCR meter, but it has the original name.https://www.eevblog.com/forum/testgear/cheap-lcr-meter-cem-dt-9935/