IEC 60151-2:1963 pdf download,Measurements of the electrical properties of electronic tubes and valves – Part 2: Measurement of heater or filament current.
IEC 60151-2:1963 specifies the conditions to be observed when measuring the heater or filament current of electronic tubes and valves. The heater or filament is responsible for bringing the emitting cathode to its required operating temperature, so its current is an important parameter affecting cathode emission, warm-up behavior, power consumption, temperature, reliability, and service life.
The document establishes a common basis for obtaining comparable current measurements under clearly defined operating conditions. It addresses matters such as the tube or valve’s normal mounting and connection, the applicable heater or filament supply, stabilization before measurement, the relationship between heater voltage and current, and the need to avoid disturbances caused by measurement instruments, wiring, contact resistance, temperature changes, or unstable operating conditions.
Importantly, this Part does not prescribe a specific measuring circuit or detailed measurement method. Instead, it defines the conditions that should be followed so that different laboratories and manufacturers can perform measurements consistently using suitable instruments and procedures. Results should be associated with the relevant tube type, heater or filament configuration, rated operating conditions, supply mode, and other factors that may influence the measured value.
The standard is intended for type testing, production inspection, technical specifications, quality control, and comparison of electronic tubes and valves. Overall, it promotes accurate and reproducible evaluation of heater or filament current and supports reliable operation and interchangeability of tube-based equipment.