GB/T 38615-2020 in English
VALIDGeneral specification of ultrasonic levelmeter
- Issued on:2020-04-28
- Implemented on:2020-11-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$214.00
《GB/T 38615-2020超声波物位计通用技术条件》由TC124（全国工业过程测量控制和自动化标准化技术委员会）归口，TC124SC2（全国工业过程测量控制和自动化标准化技术委员会控制仪表及装置、工业控制计算机系统分会）执行，主管部门为中国机械工业联合会。
Introduction
Analysis of the core content of the standard
| Technical dimensions | General requirements | Additional requirements for explosion-proof type |
|---|---|---|
| Protection level | ≥IP54(indoor)/IP65(outdoor) | Must comply with GB 3836 series standards |
| Operating temperature | -20℃~+55℃ | Special provisions according to explosion-proof type |
| EMC immunity | Electrostatic discharge level B | Must pass the encapsulation/explosion-proof test |
Detailed explanation of key technical indicators
Take the 30m range level meter as an example:
- Blind zone requirement: ≤0.7m (specified in Table 3 of the standard)
- Beam angle selection: 4°~14° can be customized, ≤8° is recommended for narrow space
- Class 0.5 accuracy: must meet the inaccuracy of ±0.5% of the range
Implementation and application recommendations
Selection guide
In corrosive environments, a split structure should be selected to separate the electronic unit from the transducer; a surge protector should be configured in situations with strong electromagnetic interference.
Installation specifications
Note when installing the flange:
- Avoid turbulent areas at the feed inlet
- Ensure there are no fixed obstacles within the beam angle
- Four-wire power supply lines must be routed independently
Background of standard evolution
For the first time, this standard includes the EMC requirements (such as electrical fast transient pulse group immunity) of ultrasonic level meters into mandatory testing items, reflecting the higher requirements for instrument reliability in the era of Industry 4.0. Major improvements compared to the old version:
- Added digital signal output specifications
- Refined the explosion-proof classification (Ga-level EPL)
- Clarified the starting drift test method
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