Is a grounding mat a worthwhile item?
Static dissipative vinyl work surface that dissipates static from conductive items placed on itProtects table and keeps sensitive components safe from damaging static shocksSingle layer, smooth top surface that is abrasion resistant and easy to wipe cleanMeets or exceeds requirements of ANSI/ESD...
notrax.justrite.com
I have put in LED lighting to replace fluro lighting, use ferrite choke on the power cord to the scale {A&D 120i} that is plugged into a line filter.
I used a gauss meter to check for electromagnetic interference and had to move a fax/phone machine out of the loading area as it too was broadcasting but I have found basically no fluctuations once I have the scale plugged in and let stand warming up for at least 1/2 hour.
The Gaussian Meter is a great tool!!! More expensive than an old AM/FM transistor Radio, with a signal meter, which I used to find EMF signal loss in my Unipoured basement walls with steel reinforcement which creates a semi Faraday Cage!!! This is before cell phones and built in signal strength bars and a time where you drove under and overpass on I-70 in Western Kansas and momentary lost the signal of the best ROCKING AM station "KOMA" (also called COMMA RADIO) located in Oklahoma City transmitting at "100,000 WATTS COMING YOUR WAY" due to the plane (z direction) of heavy steel reinforcement in the bridge and supporting columns!! The Fax Machine has very low Input/Output power!!! And the EMF stray signal of the Fax Machine decreases by a factor or 1/r^3 (1 divided by the distance away from the source by an exponential power of 3 or 1 over r cubed)!!!!!
With the Gaussian Meter, you need to look for larger coil wound devices (motors, transformers, appliances with motor and transformers, PC power supply, AC compressors, refrigerators, freezers, microwave ovens, central air fans, etc) than smaller electronic devices which require a few amps of power input!!!
If you read post 26, the aluminum plate acts as an anti static mat with the scales in the same static charge as the plate!!! Touch the plate before touching the scales does the same thing as a mat!!! And, my elbows are in contact with the large plate when operating the V4 system and 120i scales!!! Plus the plate, stops EMF signals generatored below or parallel to the plate!! Above the plate, It eliminates the stray signal vector components in the x and y plane!! Only the z component affects the impedance of the 120i scales with the straight above stray signal being the strongest!!! THIS IS PART OF THE DEFINITION DAMPING!!! And with all the HVAC ductwork, dryer duct, and 2'x2' metal suspended ceiling grid above the scales, very little of the z components of EMF stray signals will even make it to the scales!!!!
With the plate, I don't need to change out the florescent light fixtures with LEDs!! And, that surface ground top surface really stabilizes standing up brass cases!!!! However, I will change them out for electric power costs savings when the florescent bulbs start going bad or get the 60Hz flicker!!!
By the way, Fire Dog, can you get a reading of the LEDs with the GAUSSIAN Meter????
There is still a definite, directional current flow (DC) which is part of LENZ'S LAWllll Each diode element in series requires a 0.7V drop!!! Just turning the LEDs on, or off, creates an impulse or very short change in current flow!!!! Therefore, leave the lights on when starting the half hour warm up and/or time on of the 120i!!!!
IMO, keep all other AC devices away from the 120i and have them on a different breaker circuit!!! IOW, dedicate the 120i only to one circuit!!!!!!!!!! No other plug in device on that circuit or keep them unplugged when the 120i is on or warming up!!!!!
