Anti-static shoes test
Test sample preparation
A, for sample
With ethanol will be sole surface clean.
With distilled water washing the soles, and according to the prescribed
requirements, make it dry. To ban the use can make soles from corrosion, swell
deformation of organic matter and clean. By the wear, should not make the sole
surface on the soles of clean according to the area of 180 * 40 mm conductive
layer, dry and provisions on the environmental conditions.
Conductive coating resistance measurement.
Electric resistance conductive coating
device is composed of three conductive metal column, metal top radius of 3 mm +
/ - 2 mm. Engagements of columns are separated by 35 MM + / - 0.2 MM. And they
are connected by wires. The third pillar from the other two pillars connect the
midpoint of 160 mm + / - 5 mm, and the insulation between the other two
pillars.
Put shoes, with good conductive layer metal
post. Put the ball part of the shoe to 35 mm away from the two pillars, the
heel on the third pillar, must take the three pillars are in contact with the
conductive coating. Then use rules in front of the test instrument is torn the
resistance between one of the pillars and the third column, circuit principle
of the measurement results, its value must be less than 1 k Ω.
Anti-static shoes test conditions
Environmental requirements: temperature 20 ℃ plus or
minus 2 ℃; Relative humidity: 30% plus or minus 3%.
A, place the test samples specified
environment conditions for 24 hours.
B, if the trial is not within the
prescribed conditions, must be removed in the test sample to complete the test
within 5 min after the environment.
Anti-static shoes test steps
Within the test shoes filled with steel
ball by the regulation (if the upper height is not enough, to hold all the
conductive steel ball, insulating materials available heightening upper level).
Will pack a good ball test sample on the outside electrode regulation,
including, outer electrode connected between dc power, time of 1 min.
Measurement circuit principle.
Records or calculate the voltage value and
current value after the prescribed time.
