This standard specifies the test implementation conditions, test cycle, test device, testing method for temperature uniformity of the working zone of gas heat treatment furnace as well as the assessment of the temperature uniformity of working zone, etc.
This standard is applicable to the gas heat treatment furnace direct firing gas for heating inside it, including periodic (intermittent) and continuous heat treatment furnace.
2 Normative References
The following documents for the application of this document are essential. Any dated reference, just dated edition applies to this document. For undated references, the latest edition (including any amendments) applies to this document.
GB/T 1598 Platinum-10% Rhodium/Platinum Thermocouple Wires - Platinum-13% Rhodium/Platinum Thermocouple Wires - Platinum-30%Rhodium/Platinem-6% Rhodium Thermocouple Wires
GB/T 2614 Nickel-Chromium/Nickel-Silicon Thermocouple Wires
GB/T 4989 Extension and Compensating Cables for Thermocouples
GB/T 4990 Alloy Wires of Extension and Compensating Cables for Thermocouples
GB/T 7232 Terminology of Metal Heat Treatment
GB/T 9452 Testing Method for Working Zone of Heat Treatment Furnace
GB/T 13324 Terminology of Heat Treatment Equipment
GB/T 17615 Nickel-Chromium-Silicon/Nickel-Silicon-Magnesium Thermocouple Wires
GB/T 18404 Mineral Insulated Thermocouple Cables and Thermocouples
3 Terminologies and Definitions
For the purposes of this document, the following terminologies and definitions established in GB/T 9452, GB/T 7232 and GB/T 13324 as well as the followings apply.
3.1
Temperature control system error
The deviation of the temperature control system composed of temperature sensor, compensating cable and display controller, etc. to the temperature measurement result. Its value is the algebraic sum of error of all components such as temperature sensor, compensating cable and display controller, etc.
3.2
Maximum permit error
