SD_Stack
Former J.R. 1am Monitor
- Joined
- Jul 6, 2003
- Messages
- 1,999
How far off the topic of cigars can you get? Well, I'll try! 
Who works in a lab or knows anything about scales/balances?
I have an 800 gram sensitive to 0.01 grams. I need some weights to calibrate it.
This is a high end top-loading professional lab scale. $1000+ in cost.
I will be working with Grains instead of Grams. It does grains to 0.1. I will be weighing between 4 - 10 grains. For those that don't know, there are 15.43 grains in a gram. Therefore the Gram equivalent will be 0.26 to 0.65.
I will never need this scale for anything larger where accuracy really matters. If I weigh something that is 100 grains and it is off a little, it won't matter.
Should I worry about the scale being calibrate linearly or just calibrate it at the level that I will be using it? It may calibrate both ends of the spectrum by calibrating one end. I don't know.
I don't know if the flexures in the balance or still true. (the flexures bend as weight is added to the pan which changes the resistance) One or more may need replacing. I don't know that either.
I used to program and calibrate scales like this several years ago for the textile industry. I would take a regular Ohaus scale and reprogram the chip to do yarn measures. Sliver, Roving, skeins of yarn in grains per square yard/square meter etc. This would be real easy to do with the tools and resources I had back then but now, I am on my own. I guess I could go back to them but we charged $150 an hour to do this type of thing and I only gave 20 bucks for the scale!
I really need a set of weights but they are real expensive too! Do any of you know what the different classes mean and within what tolerance of weight I should choose? I could buy a 10mg and a 1g weight and calibrate the low end and forget about the 800g high end. What do you think?
Also, anyone have any weights available cheap?
Who works in a lab or knows anything about scales/balances?
I have an 800 gram sensitive to 0.01 grams. I need some weights to calibrate it.
This is a high end top-loading professional lab scale. $1000+ in cost.
I will be working with Grains instead of Grams. It does grains to 0.1. I will be weighing between 4 - 10 grains. For those that don't know, there are 15.43 grains in a gram. Therefore the Gram equivalent will be 0.26 to 0.65.
I will never need this scale for anything larger where accuracy really matters. If I weigh something that is 100 grains and it is off a little, it won't matter.
Should I worry about the scale being calibrate linearly or just calibrate it at the level that I will be using it? It may calibrate both ends of the spectrum by calibrating one end. I don't know.
I don't know if the flexures in the balance or still true. (the flexures bend as weight is added to the pan which changes the resistance) One or more may need replacing. I don't know that either.
I used to program and calibrate scales like this several years ago for the textile industry. I would take a regular Ohaus scale and reprogram the chip to do yarn measures. Sliver, Roving, skeins of yarn in grains per square yard/square meter etc. This would be real easy to do with the tools and resources I had back then but now, I am on my own. I guess I could go back to them but we charged $150 an hour to do this type of thing and I only gave 20 bucks for the scale!
I really need a set of weights but they are real expensive too! Do any of you know what the different classes mean and within what tolerance of weight I should choose? I could buy a 10mg and a 1g weight and calibrate the low end and forget about the 800g high end. What do you think?
Also, anyone have any weights available cheap?
