GB/T 11606.4-1989 Environmental test methods for analytical instruments High temperature test GB/T11606.4-1989 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Environmental test method for analytical instruments
High temperature test
The method of environmental test for analytical instrumentsHigh temperature test
Subject content and scope of application
This standard specifies the high temperature test grouping, test conditions and test methods for analytical instruments (hereinafter referred to as instruments). This standard is applicable to the assessment of the adaptability of instruments to work under high temperature environmental conditions. High temperature test groupingbzxZ.net
Working temperature
Limit working temperature
Rated working temperature
3 Test conditions
3.1 Requirements for test equipment
GB11606.4---89
3.1.1 The test chamber (room) shall be able to provide the temperature specified in Chapter 2 of this standard in its working space, with an allowable error of ±2°C. The instrument shall not be directly radiated by any heating and cooling elements. 3.1.2 Instruments with special requirements for wind speed, vibration and other influencing factors of the test chamber (room) may be stated in the product standard. 3.1.3 The volume of the test box (room) should be greater than 3 times the volume of the instrument. 3.1.4 The water vapor in the test box (room) shall not exceed 20g/m (equivalent to 50% relative humidity at 35°C). When the test temperature is lower than 35°C, the relative humidity shall not exceed 50%. 3.2 Requirements for instruments
When the working space of the test box (room) is not enough for the whole machine test, if the instrument allows, it can be connected to the whole machine in the form of a sub-unit to form a system for separate tests.
4 Test duration
The duration of the instrument temperature test should be selected from the following times: 1, 2, 4h. If there is no separate regulation, 1h is taken. 5 Test method
5.1 Pretreatment
Place the instrument under normal (or reference) environmental conditions to allow it to reach temperature equilibrium. 5.2 Initial inspection
Inspect the instrument in accordance with the relevant standards. 5.3 Test
Put the instrument in the test box (room) and power it on, then raise the temperature of the test box (room) to the specified value at an average temperature change rate of less than 1C/min. Approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on March 25, 1989 and implemented on March 1, 1990
GB11606.4-89
and maintain it for the specified temperature test duration. 5.4 Intermediate inspection
Immediately after the temperature test duration is reached, perform performance inspection in accordance with the relevant standards. After the recovery
The instrument should remain in the test box (room) and stop working, and then reduce the temperature to normal (or reference) environmental conditions at an average temperature change rate of less than 1℃/min. The recovery time after reaching normal temperature is 1h if there is no separate regulation. 5.6 Final inspection
Inspect the instrument in accordance with the relevant standards. Details to be specified when citing this standard
Items and requirements for initial inspection;
Duration of test:
Items and requirements for intermediate inspection during the test; Items and requirements for final inspection.
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