Traditional resistance measurement methods can sometimes yield inconsistent results when applied to hand tools, due to factors such as limited contact surface area or movement during testing. To address these limitations, RMV Technology employed proprietary instruments and additional specialized methodologies designed to capture accurate performance data and ensure measurement integrity. The testing program was specifically focused on verifying compliance with established ESD resistance criteria, as summarized in the chart below.
At Mountz, we address these gaps by providing clear, verifiable ESD performance data for our tools—helping customers maintain effective static control and protect product quality in their assembly processes. Introduction With no dedicated ESD standard for torque tools, Mountz partnered with RMV Technology Group to develop a rigorous testing program that would provide clear, verifiable data. Working under the guidance of ESD specialist Bob Vermillion, our screwdrivers were evaluated for static control performance across a range of operating conditions.
Methods And Results A series of tests were conducted to verify that Mountz ESD-safe torque screwdrivers adhere to the highest standards of safety and reliability. Testing included both standardized methods and adapted procedures to account for the unique form factor of hand tools. Environmental Conditions All tests conducted by RMV Technology Group were done so at 12% ±3% RH and 50% ±3% RH, with temperature maintained at 73°F ±5°F. Tools were preconditioned for 72 hours prior to testing to ensure stable results. 1. Two-Point Resistance Mapping per ANSI/ESD STM11.13:
Method: ANSI/ESD STM 11.13 specifies that materials with a surface resistance of 1x10⁴ to 1x10¹¹ ohms are considered static dissipative, with compliance typically verified through 2-point probe testing. For torque screwdrivers, this method measures resistance of the ESD coating at localized points along the tool body. It is important to note that due to the unique form factor and functionality of the screwdrivers, traditional 2-Point Probe testing may not fully capture the grounding continuity of the entire tool assembly. Because it samples only isolated spots, results can appear inconsistent or misleading.
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