10 20 Humidity Static Electricity Vinyl Envelope
Static is rarely a problem.
10 20 humidity static electricity vinyl envelope. Walking across a carpet. Static electricity 1 like lightning. Nfpa 77 1 batterymarch park quincy ma 02169 situation electrostatic voltages kv rh 10 20 rh 65 90 walking across a carpet 35 1 5 walking across a vinyl floor 12 0 25 working at a bench 6 0 1 vinyl envelopes for work instructions 7 0 6 poly bag picked up from bench 20 1 2. Walking on a vinyl tile floor.
Increasing humidity to 60 limits static build up because surface moisture on materials makes a good conductor. Walking across a carpet 35 000 v 1 500 v. The shock is from the build up of static electricity. Unfortunately 60 relative humidity is extremely uncomfortable can cause equipment problems and introduce contaminants into your system.
Walking on a vinyl tile floor 12 000 v 250 v. During the winter the humidity inside a heated space can be very low. Worker at bench 6 000 v 100 v. 7 000v 600v poly bag picked up from bench 20 000v 1 200v work chair padded with urethane form 18 000 v 1 500 v q 10.
Two levels of relative humidity rh ref. 10 to 20 relative humidity 65 to 90 relative humidity walking on carpet 35 000 1 500 walking on vinyl floor 12 000 250 worker at bench 6 000 100 vinyl work instruction envelopes 7 000 600 common poly bag picked up from bench 20 000 1 200 polyurethane foam padded chair. Table 6 3 electrostatic voltage at workstations static voltage means of static generation relative humidity 10 20 relative humidity 65 90 walking across carpet 35 000 1 500 walking over vinyl floor 12 000 250 worker at bench 6 000 100 vinyl envelopes for work instructions 7 000 600 common polly bag picked up from bench 20 000 1 200 work chair padded with urethane foam 18 000 1 500. This increases the condutivity of most things enough that static charges are drained off.
Means of static generation. Table 2 1 typical measured static charges in volts relative humidity item low 10 20 high 65 90 walking across carpet 35 000v 1 500v walking over vinyl floor 12 000v 250v worker at bench 6 000v 100v vinyl envelopes for work instruct. Vinyl envelopes for work instructions 7 000 v 600 v. Table 10 1 typical measured electrostatic voltages voltage levels relative humidity means of static generation low 10 20 high 65 90 walking across carpet 35 000 1 500 walking over vinyl floor 12 000 250 worker at bench 6 000 100 vinyl envelopes for work 7 000 600 instructions common poly bag picked up from 20 000 1 200 bench work chair padded with urethane 18 000 1 500 foam 10 16.
Means of static generation rh 10 20 rh 65 90.