Hitachi SRP-4 Calibration Standard (also called Cmi500 Calibration Standard and Cmi700 Calibration Standard and PTH Hole calibration standard plate<\/span>) is a core precision tool for PCB thru-hole copper thickness testing. Specifically designed for Hitachi CMI500 Hole Cu Thickness Tester (specialized in hole copper detection) and CMI700<\/a> Cu Thickness Tester (dual-purpose for surface and hole copper), it serves as a “reference benchmark” to correct gauge drift over time\u2014critical for reliable data in PCB electroplating and quality control. Made of high-purity copper with precision-drilled thru-holes (matching PCB PTH hole specifications), this Calibration Standard Plate eliminates measurement deviations caused by uncalibrated equipment. As part of our one-stop PCB testing solutions, it works seamlessly with PTH Hole ETP Probe<\/a> (for hole copper testing), providing comprehensive support for PCB factories and testing labs.<\/p>\n The integrity of the Calibration Standard Plate<\/b> is defined by its material construction and the rigor of its certification.<\/p>\n The plate replicates the geometry and material composition of a real PCB being measured:<\/p>\n Substrate:<\/b> Typically a non-conductive, high-grade laminate material (similar to FR4) to simulate the actual product environment.<\/p>\n<\/li>\n Coating:<\/b> Features highly uniform Certified Thickness<\/b> layers of pure copper. These copper layers are deposited under strict quality control to ensure minimal variation across the standard’s surface.<\/p>\n<\/li>\n<\/ul>\n The set usually comprises multiple plates, each representing a distinct, critical thickness point across the SRP-4’s operating range (e.g., 5\u03bcm<\/span>, 18\u03bcm<\/span>, 35\u03bcm<\/span>, 70\u03bcm<\/span>). These values are verified by independent, high-accuracy methods.<\/p>\n The Hitachi SRP-4 Calibration Standard<\/b> plays a non-negotiable role in PCB Quality Control (QC).<\/p>\n Establishing Zero and Span:<\/b> The standard set is used to define both the zero point<\/i> (unplated substrate) and the span<\/i> (the maximum thickness) of the gauge, ensuring the entire measurement curve is accurate.<\/p>\n<\/li>\n Eliminating Drift:<\/b> Regular use of the standard plate compensates for environmental factors (temperature, humidity) and electronic drift within the CMI instrument, ensuring long-term measurement consistency.<\/p>\n<\/li>\n Post-Maintenance Verification:<\/b> After any significant event, such as SRP-4 Probe replacement or instrument servicing, the Standard Plate is the first item measured to confirm operational accuracy before production testing resumes.<\/p>\n<\/li>\n<\/ul>\n The primary usage is confined to the Surface Finishing Industry and Electronics Manufacturing.<\/p>\n Hitachi SRP-4 Calibration Standard is used to accurately calibrate SRP-4 micro-resistance probes, ensuring precise and repeatable copper thickness measurements on printed circuit boards<\/p>\n Material: <\/strong>High-purity electrolytic copperMaterial Technology and Certified Values<\/h2>\n
1. Material Construction<\/h3>\n
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2. Certified Thicknesses<\/h3>\n
Key Features and Essential Role<\/h2>\n
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Application<\/h2>\n
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\n Application Scenario<\/strong><\/td>\n Search terms<\/strong><\/td>\n Value Delivered<\/strong><\/td>\n<\/tr>\n<\/thead>\n\n \n Routine QC Checks<\/b><\/span><\/td>\n Calibration Standard Plate<\/b> \/ Standard Calibration Plate<\/b><\/span><\/td>\n Ensures that every measurement taken during a production run is accurate and verifiable, reducing scrap rates.<\/span><\/td>\n<\/tr>\n \n New Probe Installation<\/b><\/span><\/td>\n CMI700 Calibration Standard<\/b> \/ SRP-4 Calibration Kit<\/b><\/span><\/td>\n Essential for setting the gain and offset of the new probe, guaranteeing its initial \u00a01% <\/span>accuracy.<\/span><\/td>\n<\/tr>\n \n Compliance & Audits<\/b><\/span><\/td>\n NIST Traceable Copper Thickness Standard<\/b><\/span><\/td>\n Provides the necessary documentation and traceability required for ISO 9001 and high-reliability industry audits (e.g., automotive).<\/span><\/td>\n<\/tr>\n \n Technical Research<\/b><\/span><\/td>\n Calibration Plate Meaning<\/b> \/ Calibration Standard Definition<\/b><\/span><\/td>\n Used to define and validate the accuracy limits of new PCB materials or plating processes.<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n FAQ<\/strong><\/h2>\n
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