The variance in output values when approaching a specific input checkpoint from an upscale direction versus a downscale direction.
Inputs are applied in a continuous ascending cycle up to 100%, followed immediately by a descending cycle back to 0%. The maximum variance between the upscale and downscale output curves reveals the device's mechanical or electronic hysteresis. 4. Dead Band Testing
: Measures the precise speed and time delay an instrument takes to settle after a sudden change. iec 612982
Implementing IEC 61298-2 offers immediate advantages across the entire automation supply chain:
The core of IEC 61298-2 revolves around a series of tests that determine essential performance metrics: 1. Accuracy and Error Measurement The variance in output values when approaching a
: Measurements must be repeated over multiple full upscale and downscale cycles. This allows testers to capture directional behavior (hysteresis) and variations over time (repeatability).
The range through which an input can be varied without initiating a measurable change in the output. This is critical for mechanical instruments and valves. Accuracy and Error Measurement : Measurements must be
Part 3 references IEC 61000-4 series (1990s editions). For modern EMC (e.g., 6 GHz radiated, fast transients up to 4 kV), you need the latest IEC 61000-4-3/4/5/6.
Choose Vendor B. Why? Because you know exactly how the instrument will behave in your plant where summer temperatures hit 45°C. Vendor A's vague claim is unverifiable.
: Evaluates how the device copes with real-world disruptions like extreme temperatures, electromagnetic interference (EMI), mechanical vibration, and supply voltage fluctuations.