| General > General Technical Chat |
| I bought new bench scales (plus, discount code for Australian buyers) |
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| HighVoltage:
--- Quote from: jfiresto on July 15, 2021, 12:43:31 pm --- --- Quote from: HighVoltage on July 15, 2021, 12:20:45 pm ---I found a really nice Mettler Toledo scale on ebay a few months ago. They are usually very expensive but I got a really good price.... --- End quote --- I have been meaning to get an analytical balance to better measure small objects. That one looks nice and is old enough that it does not auto-recalibrate when you open a window. To reduce temperature changes and air currents, our friendly, local office of weights and measures (Eichamt) has their balances in a small, closed, lowered-ceiling room inside a bigger room. --- End quote --- Interestingly, temperature does not have such large influence as air current. But, what surprised me is the large influence by static electricity. But be careful, once you open the door to precision scaling, you need very accurate calibration weights and they can cost more than the scale. |
| deadlylover:
Where was that Wedderburn scale made if you don't mind me asking? Bestie is an analytical chemist and he recommends A&D or Sartorius....not that the advice would be of much use for the home hobbyist. Maybe if we get lucky on eBay? :P In the kitchen I have an A&D SK-2000 (made in Korea), it's a basic model only capable of 2000g x 1g but that's enough for general cooking. I got it for AUD 88 which is a bloody steal from their surplus store on the Aussie website, but it looks like they don't have any scales on clearance anymore. (but maybe someone in the future will get lucky!) |
| Halcyon:
--- Quote from: jfiresto on July 15, 2021, 09:50:09 am ---I was curious if either scale can be user calibrated. --- End quote --- There is an "offset" setting on my scale which seems to have been pre-programmed. I'm guessing this is the calibration? I'm not going to mess with it. There is also an error code in the manual that refers to "incorrect calibration weights" but then just refers the user back to the manufacturer. So whilst the manual doesn't tell you how to do it, it appears you can do it. I might reach out and see if they are willing to share the calibration procedure with me. --- Quote from: peteru on July 15, 2021, 11:04:27 am ---I was contemplating scales for brewing beer. These need to be able to weigh out 4-7kg of grain (where the resolution is not all that important) and also hops in the 10-200g range to the nearest gram. For salt additions, I have scales that are good for 200g, +/- 0.1g Both of the above look like contenders, although I might have to split the grain quantities for larger batches. --- End quote --- Wedderburn have other scales in the same WS201 model range. There is also a WS20110K (10kg/0.5g) and WS20120K (20kg/1g). There also other models that are IP68 rated such as the WS20215K (15kg/1g). --- Quote from: HighVoltage on July 15, 2021, 12:20:45 pm ---I found a really nice Mettler Toledo scale on ebay a few months ago. They are usually very expensive but I got a really good price. It has so much resolution, it can detect the weight of a pencil line on a paper. Really impressive to see this for the first time. --- End quote --- I did look at MT as well. They make some really nice gear. But yes, quite expensive. Even the Wedderburn ones started to approach the limit of what I wanted to spend on a set of kitchen scales that I might use a few times a week, but they should last many years. --- Quote from: peteru on July 15, 2021, 02:10:51 pm ---Wedderburn scales and slicers seem to be in every Woolworths store I've been to. At least the deli, butcher and seafood departments. Local butcher and fruit-n-veg shop also have them. One would assume that it's gear that just works and when it doesn't, it's backed by solid service. --- End quote --- I have to say, the service from them during the sales process was absolutely top notch. The person I dealt with got back to me via email within 30 minutes or less and was even responding after hours. I'd like to think that their after-sales service is just as good. To be honest, I was half-expecting them not to even bother with me as an end-user wanting a low-end set of scales, but that turned out not to be the case at all. --- Quote from: deadlylover on July 15, 2021, 04:40:37 pm ---Where was that Wedderburn scale made if you don't mind me asking --- End quote --- China, like everything else. I don't know if they still manufacture any of their products in Australia (maybe some of the higher-end units?). All the service, calibration, repairs etc... are done here in Sydney. They have a huge warehouse and office complex in Ingleburn. They have labs in Sydney. Brisbane, Melbourne and Perth which are all NATA accredited. This is the link to the Sydney (Ingleburn) site accreditation: https://www.nata.com.au/entity_scope/?AccNo=5486&q1=487&str=&&AccNo=5486 |
| deadlylover:
--- Quote from: Halcyon on July 15, 2021, 10:54:59 pm ---There is an "offset" setting on my scale which seems to have been pre-programmed. I'm guessing this is the calibration? I'm not going to mess with it. There is also an error code in the manual that refers to "incorrect calibration weights" but then just refers the user back to the manufacturer. So whilst the manual doesn't tell you how to do it, it appears you can do it. --- End quote --- Is the offset value similar to the value of gravity? It could be the adjustment for gravity compensation for when you move location but don't have access to calibration weights. The manual for my A&D SK-2000 has a world map and a graph for gravity compensation, which is hilarious for an entry-level scale. Thanks for checking where it's made, it doesn't matter much in the grand scheme of things but it would have been icing on the cake. |
| Halcyon:
--- Quote from: deadlylover on July 16, 2021, 02:45:02 am --- --- Quote from: Halcyon on July 15, 2021, 10:54:59 pm ---There is an "offset" setting on my scale which seems to have been pre-programmed. I'm guessing this is the calibration? I'm not going to mess with it. There is also an error code in the manual that refers to "incorrect calibration weights" but then just refers the user back to the manufacturer. So whilst the manual doesn't tell you how to do it, it appears you can do it. --- End quote --- Is the offset value similar to the value of gravity? It could be the adjustment for gravity compensation for when you move location but don't have access to calibration weights. The manual for my A&D SK-2000 has a world map and a graph for gravity compensation, which is hilarious for an entry-level scale. --- End quote --- I'm not too sure. The manual is very basic (more like a quick start guide) and it doesn't mention what "offset" does. If I go into it, it shows 130350 on the display but the last two digits bounce around a little bit, so not quite sure what that's about. It's obviously measuring or getting live data from something. I'm just assuming it's something the average end-user shouldn't be playing around with. No doubt there is a separate technical guide. |
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