GB18523-2001
General specification for hydrologic instrument safety requirements
水文仪器安全要求
GB 18523-2001 is a current mandatory Chinese national standard for General specification for hydrologic instrument safety requirements. It appears in the Machinery compliance cluster with a product safety focus and has an implementation date of Mar 1, 2002.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard specifies the general safety requirements for various types of hydrologic instruments. It is applicable to equipment used in hydrological monitoring, including sensors and data collection devices deployed in water environments. Compliance with this standard is mandatory for all manufacturers of hydrologic equipment entering the Chinese market. It replaces the previous GB 9359.7-1988.
Technical requirements
The standard outlines general safety requirements, emphasizing that instruments must not pose risks to personnel or the environment during normal operation or potential faults. It specifically addresses environmental pollution, human health, and the safety of instruments mounted on carriers like vehicles or cableways. For long-term unattended instruments, manufacturers must prioritize low-voltage DC power supplies to mitigate safety risks. Structural safety requirements cover stability, mechanical hazards, and mechanical strength. Instruments must withstand harsh climates and improper operations, with specific provisions for devices fixed on carriers, outdoor buildings, or underwater. The standard also details protective measures against electric shock and mandates clear marking and color-coding for control mechanisms, referencing symbols from GB 4793.1. Electrical safety requirements classify instruments into Class I, II, and III safety categories based on voltage and grounding. The standard specifies basic electrical protection, including overcurrent protection, lightning protection, and grounding resistance limits. Engineers must ensure proper protective grounding and lightning protection measures are implemented for all signal and power ports. A notable addition in this revision is the inclusion of software and data security requirements. Application software must be solidified in non-volatile memory and possess fault-tolerance capabilities. Instruments must incorporate hardware watchdog circuits and password protection to prevent system crashes and unauthorized data modifications.
Testing methods
The standard mandates several key testing procedures to verify compliance. These include insulation resistance testing and leakage current testing, which are conducted after a 48-hour humidity preconditioning process. Additionally, a dielectric strength test is required, which must be performed in accordance with the relevant provisions of GB 4793.1-1995. Visual inspections are also mandated for structural stability and marking verification.
FAQs
What products are regulated under GB 18523-2001?
GB 18523-2001 applies to all types of hydrologic instruments, including sensors, data collection devices, and monitoring equipment used in water environments.
Is GB 18523-2001 a mandatory standard?
Yes, all technical content within this standard is mandatory. Manufacturers must comply with these safety requirements to sell hydrologic instruments in China.
What are the main updates from the previous version?
The standard replaces GB 9359.7-1988 and introduces new requirements for software and data security, environmental pollution, and long-term unattended instruments. It also updates electrical safety testing methods.
The summary above provides a high-level overview of GB 18523-2001. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 18523-2001 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Safety
- CCS
- N93
- ICS
- 07.060
- Competent department
- Ministry of Water Resources
- Technical committee
- National Technical Committee on Hydrology of Standardization Administration of China
Relationships
Replaces:GB 9359.7-1988