The Herz 3K is a digital pressure and vacuum measurement device purpose‑built for the airtightness testing of plastic and textile welding seams. Rather than relying on the operator to interpret a simple pressure decay reading, the 3K enables QA managers to pre‑program pass/fail limit values and precise measurement times, turning a traditionally subjective inspection into an automated, repeatable quality control process. The built‑in 3‑channel datalogger captures the full test history, and the included PC reporting software prints a complete, uneditable measurement record—providing objective QA documentation for customer audits, contractual compliance, and internal statistical process control. A built‑in serial gateway connects the device directly to a PC, eliminating the need for a separate PLC or proprietary interface and enabling seamless integration into the plant's existing quality data management infrastructure.

Digital Pass/Fail Logic — Removing Subjectivity from Weld Testing

• Pre‑Programmable Limit Values: The 3K allows the QA supervisor to define pressure and vacuum thresholds for a pass/fail decision before the test begins. The operator simply connects the test bell to the weld seam, initiates the cycle, and the device automatically compares the measured pressure level against the programmed limit, indicating a clear pass or fail on the display. This eliminates variability between different operators on different shifts and ensures that every weld seam is evaluated against the same objective criteria.
• Adjustable Measurement Times: Different products and materials require different test durations. The 3K allows the measurement time to be adjusted according to the specific environmental conditions—ambient temperature, material thickness, or pipe diameter—ensuring consistent test results across production runs and between different testing locations within the plant.

3‑Channel Datalogging and PC Software — Total Traceability for QA Audits

• Built‑In 3‑Channel Datalogger: Every measurement cycle is automatically recorded and stored in the device's internal memory, with three measurement channels capturing pressure/vacuum levels, time stamps, and pass/fail status. This data is stored in a format that can be retrieved even if the device has been powered off between test cycles, providing a reliable, non‑volatile record of all quality inspections.
• PC Reporting Software for Complete Measurement Records: The included PC software communicates with the 3K via a serial gateway and generates a complete, formatted measurement record—including the measured values, the limit thresholds, the pass/fail decision, and the date/time stamp. This report can be printed directly from the software and attached to the shipment documentation, giving customers and auditors concrete, traceable evidence that each weld has been tested and approved before it left the factory.
• Direct Integration into Existing IT Infrastructure: The serial gateway provides a standard interface that allows the 3K to be connected to any PC with an available RS‑232 port. No proprietary communication protocol or dedicated hardware is required, making the device compatible with the plant's existing quality data management systems and reducing the integration effort compared to closed‑architecture testing equipment.

Applications

• Final‑inspection testing of plastic membrane weld seams on flat‑roof waterproofing, truck covers, and advertising banners
• Continuous quality assurance for butt‑welded joints in pipe and fitting manufacturing
• Laboratory‑scale weld strength and airtightness characterization during new material qualification
• On‑site commissioning testing of installed plastic liners in landfill and pond construction
• Any application where demonstrable weld‑seam integrity testing is required as part of the manufacturer's quality management system