Resistance -To- Ground -Tester Z109

The grounding of ESD protective equipment is used to reduce the chance of damage to susceptible parts and assemblies resulting from ESD. The first step in ensuring that everything is at the same electrical potential is to ground all components to the same electrical ground point. This point is called the common point ground and is defined by ANSI EOS/ESD/S6.1 as a system or method for connecting two or more grounding conductors to the same electrical potential.

ANSI S6.1: Highly conductive work surfaces and ESD protective flooring should be connected directly to ground eliminating the resistor. For static dissipative work surfaces and ESD protective floor mats the resistors are optional. The total DC resistance from the ground point of a device such as wrist strap or table mats to the common point ground or equipment ground should be less than 1 ohm. The DC resistance from the common point ground to the equipment ground should also be less than 1 ohm. The total impedance of the conductor from the common point ground to the neutral bond point at the main shall be less than 1.

ANSI recommends an equipment ground impedance meter or indicator, with a measurement range upto 1 ohm for verifying the ground.

The Model 109 verifies that the bonding-to-ground of the ESD workstation is less than 1 or 2 Ohms, depending on the range selected. This hand-held, portable unit allows the user to make fast, accurate checks of point-to-ground connections on ESD workstations and other associated items.