Hydrological instrument solar radiation test

The heating effect of solar radiation tests (xenon lamp exposure test, carbon arc lamp exposure test, halogen lamp exposure test) is mainly produced by the mid-infrared spectrum part of solar radiation energy, which mainly causes short-term high temperature and local overheating of the product, causing the failure of some temperature-sensitive components, mechanical damage to structural materials and overheating damage to insulation materials, etc.
Hydrographic instrument solar radiation testing determines the ability of hydrographic instruments used in field exposure to withstand the heat and degradation effects of solar radiation. Zhongke Testing Reliability Experiment Center has environmental testing capabilities for various hydrological instruments, and provides professional environmental testing services such as solar radiation testing for hydrological instruments.

Instruments, equipment or devices for observing hydrological elements, collectively referred to as hydrological instruments, are mainly divided into: water level instruments, flow velocity instruments, precipitation instruments, water temperature instruments, ice ice instruments, soil water instruments, sediment testing instruments, water quality sampling instruments, hydrological testing equipment and measuring tools, counting display and recording instruments, communication telemetry instruments and equipment, data conversion and processing instruments
Specifically, it includes: hydrological patrol vehicles, automatic hydrological reporting devices, water level sensors, water level needles, remote thermometers, semiconductor thermometers, neutron water meters, suspended sediment samplers, ultrasonic detectors, etc.

1. According to the purpose of the test, one of the following test procedures can be used:
a) Test procedure A: thermal effect evaluation, with 24 hours as a cycle, irradiation for 8 hours, irradiation for 16 hours, and repeated tests as required (the total radiation amount of each cycle is 8.96 kW·h/m² , which is equivalent to the harshest natural conditions). 3 cycles should be performed.
b) Test procedure B: Evaluation of degradation effects, taking 24 hours as a cycle, irradiating for 20 hours, stopping for 4 hours, and repeating the test as required (the total radiation amount of each cycle is 22.4 kW·h/m²). It is advisable to carry out 3 cycles, but 10 or 56 cycles can also be carried out.
2. During the irradiation period, the temperature in the test chamber should rise to 55°C at a nearly linear rate and be maintained. In test procedure A, the temperature in the test chamber should be raised 2 hours before the start of each irradiation stage. During the illumination-stop phase of test procedures A and B, the temperature in the test chamber should drop to 25°C at a nearly linear rate and maintain a stable temperature. During the entire conditional test, the temperature in the test chamber should be maintained within ±2°C of the value specified in the program.

GB/T 9359-2016 Basic environmental test conditions and methods for hydrological instruments
GB/T 1771 Paints and varnishes - Determination of resistance to neutral salt spray
GB/T 2421.1 Environmental testing of electrical and electronic products Overview and Guide
GB/T 2421.2 Environmental testing of electrical and electronic products Information for specification preparers Test summary
GB/T 2422-2012 Environmental Testing Guidelines for Writing Test Methods Terms and Definitions
GB 4208-2008 Shell protection level (IP code)
GB/T 4796 Classification of environmental conditions for electrical and electronic products Part 1: Environmental parameters and their severity
GB/T 19677 Hydrological Instrument Terminology and Symbols
GB/T 50095 Basic Hydrological Terminology and Symbol Standards