General > General Technical Chat
I bought new bench scales (plus, discount code for Australian buyers)
Ian.M:
--- Quote from: peteru on July 15, 2021, 12:12:52 pm ---What I would like is a second set of scales that has 1g resolution somewhere up to about 500g or 1kg and a maximum range to about 5-10kg with coarser resolution. That ought to be doable.
--- End quote ---
Nope, not economically. The max FSD range and accuracy is constrained by the load cells used. There is therefore little point in switching ranges as displays and 16 bit ADCs suitable for 4 1/2 digit resolution are now dirt cheap, and to switch ranges meaningfully either requires two sets of load cells in cascade with precision mechanical stops to transfer the load to the heavy duty ones when the low range ones are slightly over their nominal FSD, or moveable pivot points for the lever(s) supporting the platform.
--- 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.
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Unless you get very lucky on Ebay, it will almost certainly be cheaper to get two new scales, one for mid-range and the other for heavy weighing than one that can do both jobs. This also has the advantage that you can leave the heavy scales under your mash tun (and possibly under its heater if its a gas or electric ring with a highly flexible cord or hose supported at a fixed point near the scales) for the duration, so you don't break your back humping the tun onto and off of the scales, while still having the mid-range and precision scales conveniently placed on your counter for weighing the other ingredients.
jfiresto:
--- 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.
austfox:
On a side note, Wedderburn were in a lovely grand old building on Paramatta Rd at Summer Hill (in Sydney) for many decades. Unfortunately that building has long gone. The new building on that site now houses Wagner Electronic Services (WES), suppliers of electronic components with a particular emphasis on the service technician and installers (alarm, audio/visual etc).
I haven’t used a Wedderburn for years, but I remember the one we had at the shop back in the 80’s, complete with nixie tube displays. It was huge by today’s standards, but just kept working!
peteru:
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.
HighVoltage:
--- Quote from: Ian.M on July 15, 2021, 12:28:54 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.
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 ---
Unless you get very lucky on Ebay, it will almost certainly be cheaper to get two new scales, one for mid-range and the other for heavy weighing than one that can do both jobs.
--- End quote ---
Actually, you can get very lucky on ebay from time to time. I bought a few other Mettler Toledo scales for the different ranges and they are just working perfectly.
However, I must admit that I bought one Mettler scale that was only good as a parts supplier.
After spending quiet some time with scales in the last weeks, I am more and more intrigued by high quality scales.
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