Saturday, Mar 03, 2018 at 11:05
Scales that are specified for trade purposes must be approved by the National Measuring Institute, and be;
1. An approved type, that is suitable for its intended purpose
2. Verified before use by a licensed technician or inspector
3. Used in the correct manner (e.g. level and indicating zero before use)
4. Kept clean and in good working order
5. Verified after each repair or adjustment.
These scales are also checked at random by NMI trade measurement inspectors for accuracy - especially after any consumer complaints to them as regards accuracy of measurement of weight for a particular sale.
All other scales sold for consumer use are merely guesswork - and with the huge influx of Chinese scales of widely varying quality and accuracy, largely aimed at the consumer market, you are highly likely to end up with scales of extremely dubious value.
If you require accuracy in weighing, just for a total weight, stop at a country grain receival facility when things are quiet, and ask if you can put your rig over their weighbridge.
Most of these sites are obliging and don't mind you doing this. In fact, a few years ago, CBH in W.A. used to conveniently leave their grain receival facility scales switched on, 24 hours a day!
What was even better, you could drive into the facility any time day or night, and view the scales through the weighbridge window!
You didn't even need anyone in the weighbridge office! I did that many a time in the 80's and 90's when hauling overloaded trailers, just to see by how much I was overloaded! LOL
I'm not sure how much stricter the procedures for access to grain receival weighbridges are today - but no doubt in this era of terrorists in every dark corner, you probably need security clearance to access a grain receival point weighbidge, today!
If you really want to purchase good quality, accurate scales, then you need to purchase commercial grade scales, from businesses who specialise in load cells, and front-end-loader and forklift weighing systems, etc.
Accu-Weigh
For myself - I bought a used pallet trolley scale at auction for $90. It didn't work, and the charger was missing - although it all appeared to be in pretty good shape.
I got it
home and took the cover off the battery mechanism and found the small 7.2V SLA battery was deceased!
I acquired a new battery from Jaycar, bought a 240v-to-7.2V charger with the right charge connector direct from China - and hey, presto, I now have a quite accurate mobile set of scales, that weighs up to 2 tonnes! (and yes, I've checked them against a known weight of steel).
Cheers, Ron.
AnswerID:
617334
Follow Up By: Geoff49 - Saturday, Mar 03, 2018 at 11:21
Saturday, Mar 03, 2018 at 11:21
Thanks Ron
I'm going to give up on the cheap consumer scales and use a weighbridge instead. There is one about 20km from
home and the operator only charges $10 if you don't want official paperwork.
FollowupID:
888917