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Noise filter for electronic scale?

mattri

Silver $$ Contributor
For those running electronic scales what are you using to mitigate electronic noise?

Obviously try to stay away from known sources, fluorescent ballasts etc, anyone running a filter- which?

Thanks, Mat.
 
Matt,

I use a TrippLite LC1200 line conditioner. I purchased it when I got my FX120i. Since the FX120i has always been on the line conditioner I cannot say if it made any difference on that scale but I did notice better performance from my Chargemaster once it was on the line conditioner.

Josh
 
I've had a GemPro 500 scale for a long time and never really had much problem with it "wandering". But several years ago I bought a RCBS Chargemaster 1500 and had lots of problems. I read a lot on here and other forums about ways to mitigate the problems and have done the following:
I have done several 50 charge studies after each change and can't definitively prove that any of these changes made any statistical difference. Intuitively I'm sure they have, but it just seems that my CM has "good days" and "bad days".
 
mattri said:
For those running electronic scales what are you using to mitigate electronic noise?

Obviously try to stay away from known sources, fluorescent ballasts etc, anyone running a filter- which?

Thanks, Mat.
Click to expand...
Before Radio Shack went belly up. I used snap-caps from them. If you do a search for snap-caps may solve your problem. Just my two cents. Tommy Mc
 
I suggest first trying the scale with no filters etc. Add as needed, it may work OK without any.

I have no filters on my Fx120i, I do have a direct line to the electrical panel, with nothing else on that line. I do have two sets of 8 foot long fluorescent bulbs right above my load bench, and experience no problems from them.
 
An uninterruptible power supply should do the trick, and protect your scale from voltage spikes.
www.techhive.com

Uninterruptible power supply: How to pick the right one

A surge protector will save your equipment; a UPS will do that and save your work, too—or let you save your game during a blackout.
www.techhive.com www.techhive.com

This is simply (?) a battery with converter for output, with a built in battery charger. You're running directly off batteries all the time, but the battery is constantly charged. It protects from brief power interruptions, surges or voltage spikes.
 
I've used an RCBS Chargemaster for over 10 years in several houses in three different states and I've never had a problem with drifting numbers. I think this fear of line noise is just a lot of silly Internet fake crap. Yes, it can be an issue if your house has poor electrical service or was wired incorrectly but modern homes that are built to code wont have a problem unless you've introduced noise in to the system with faulty electrical equipment in your home.
 
Electrician here.. Some homes are worse than others. Inductive loads can and do cause harmonics on your house power. Line noise is not fake. You just cannot read it with out the proper volt/power meter. There are a ton of posts on this forum referencing this and problems with electronic scales. .. Especially when using florescent lights. The new electronic ballasts in these are even worse..
 
TheOtherZilla said:
Electrician here.. Some homes are worse than others. Inductive loads can and do cause harmonics on your house power. Line noise is not fake. You just cannot read it with out the proper volt/power meter. There are a ton of posts on this forum referencing this and problems with electronic scales. .. Especially when using florescent lights. The new electronic ballasts in these are even worse..
Click to expand...

Would AC inverter drives, like now being used to control residential washing machine and AC motors, induce harmonics?
 
Last edited:
Texas10 said:
An uninterruptible power supply should do the trick, and protect your scale from voltage spikes.
www.techhive.com

Uninterruptible power supply: How to pick the right one

A surge protector will save your equipment; a UPS will do that and save your work, too—or let you save your game during a blackout.
www.techhive.com www.techhive.com

This is simply (?) a battery with converter for output, with a built in battery charger. You're running directly off batteries all the time, but the battery is constantly charged. It protects from brief power interruptions, surges or voltage spikes.
Click to expand...
That is only true of an Online UPS. Most lower cost UPS are Standby UPS and connect the load directly to mains in normal service.
 
wkdickinson said:
I've had a GemPro 500 scale for a long time and never really had much problem with it "wandering". But several years ago I bought a RCBS Chargemaster 1500 and had lots of problems. I read a lot on here and other forums about ways to mitigate the problems and have done the following:
I have done several 50 charge studies after each change and can't definitively prove that any of these changes made any statistical difference. Intuitively I'm sure they have, but it just seems that my CM has "good days" and "bad days".
Click to expand...
The tube led lights have switching power supplies in them which can be a source of noise. I built a 48v linear DC supply and converted 3 dual led tube lamps to run off of that. Don't know if the original configuration would've been problematic.
 
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