US 8,138,936 B2Granted

Method for testing personnel ESD grounding devices with function of near-fail alert and device for performing the same

OwnerTony-Sheng Lininventor

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Abstract

A method for testing personnel ESD grounding devices with a function of near-fail alert is disclosed. A near-fail range is set. When the measurement of the resistance for a wrist strap or a footwear is within the near-fail range; an alarm is actuated to alert the user that the static electricity prevention device worn by the user will fail soon. The near-fail range is provided so that the user can receive an alert when the wrist strap or the footwear being worn on will fail soon in the near future and thus to remind the user to adopt proper reactions to change or fix the personnel ESD grounding device to prevent its sudden failure during actual use. Furthermore, the test provides digital readouts and has higher precision to avoid faulty results. Moreover, the wrist strap and footwear are tested simultaneously and individual results can be derived so as to avoid errors in test. A device for performing the method is also provided.

Claims3

Dependent claims

A device for testing personnel ESD grounding devices with a function of near-fail alert;

the device having a tester;
wherein a near-fail range is set in the tester;
when the measurement of the resistance for a wrist strap or a footwear is within the near- fail range;
an alarm is actuated to alert a user that the static electricity prevention devices worn by the user will fail soon;
and wherein the near-fail range is set in the test pass range, but near a test fail limit;
wherein the tester includes a plurality of LED alarm lights serve for displaying test results;
wherein each set of LED alarm lights includes three lights of different colors for displaying various test results;
wherein the lights includes a red light, a yellow light and a green light;
wherein the yellow light shows that the value of resistance of the object under test is bigger than the upper limit;
and the test is a fail;
the red light shows that the value of resistance of the object under test is smaller than the lower limit;
and the test is a fail;
the green light shows that the value of resistance of the object under test is allowable;
and the test is a pass;
if both the green light and yellow light turn on simultaneously, it represents that the resistance of the object under test is within a permissible range but it is also near an upper limit, that is, the object under test is near-fail high;
and
if both the green light and red light turn on simultaneously, it represents that the resistance of the object under test is within a permissible range but it is also near a lower limit, that is, the object under test is near-fail low.

14 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/178,589Filed 23 Jul 2008
Published: US 2010/0019914 A128 Jan 2010
Granted: 20 Mar 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01R 35/00
Testing or calibrating of apparatus covered by the other groups of this
G01R 27/14
Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant: measuring…
G01R 31/001
Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by…
A61N 1/14
Electrotherapy; Circuits therefor: leading-off electric charges, e.g. by earthing