JB/T 51089-1999
Electromagnetic ammeters for tractors and internal combustion engines - Product quality grading (Internal use)
拖拉机、内燃机用电磁式电流表 产品质量分等（内部使用）
Catalogue
前言 → 1 范围 → 2 引用标准 → 3 一般要求 → 4 产品质量的分等 → 5 产品质量等级指标 → 6 试验方法 → 7 检验规则 Foreword → 1 Scope → 2 Normative References → 3 General Requirements → 4 Product Quality Grading → 5 Product Quality Grade Indicators → 6 Test Methods → 7 Inspection Rules
Scope
This standard specifies the product quality grading, test methods, and inspection rules for electromagnetic ammeters used in tractors and internal combustion engines. This standard applies to the quality inspection and grade evaluation of electromagnetic ammeters (hereinafter referred to as ammeters) for tractors and internal combustion engines.
本标准规定了拖拉机、内燃机用电磁式电流表产品质量分等、试验方法和检验规则。本标准适用于拖拉机、内燃机用电磁式电流表（以下简称电流表）产品质量的检测和等级评定。
Normative References
Keywords
Application Summary AI generated
Manufacturers and testing organizations of tractors and internal combustion engines use this standard to grade and evaluate the quality of electromagnetic ammeters. By defining specific technical indicators for qualified and first-grade products (such as basic error, vibration resistance, and durability), it ensures the reliability and consistency of ammeters under various operating conditions. This standard is crucial for maintaining stable electrical system performance and quality control in tractors and engines.
拖拉机、内燃机制造商和检测机构使用该标准来对电磁式电流表进行质量分等和等级评定。该标准通过规定合格品和一等品的具体技术指标（如基本误差、耐振动、耐久性等），确保电流表在不同工况下的可靠性和一致性。它对于保障拖拉机、内燃机电气系统的稳定运行和产品质量控制具有重要意义。
AI Summary AI generated
This standard specifies the product quality grading, test methods, and inspection rules for electromagnetic ammeters used in tractors and internal combustion engines. It classifies ammeters into two grades: qualified and first-grade, and details technical indicators including structural dimensions, appearance, basic error, damping, overload, voltage withstand, temperature effect, vibration resistance, dustproofing, waterproofing, durability, damp-heat cycling, and salt spray resistance. Test methods cover dimensional measurement, visual inspection, and performance testing. Inspection rules follow the sampling plan of GB/T 2828, with evaluation based on defect classification. The standard applies to quality inspection and grade evaluation of these ammeters.
本标准规定了拖拉机、内燃机用电磁式电流表的产品质量分等、试验方法和检验规则。标准将电流表分为合格品和一等品两个等级，并详细列出了结构尺寸、外观、基本误差、阻尼、过载、耐电压、温度影响、耐振动、防尘、防水、耐久性、交变湿热和耐盐雾等多项技术指标。试验方法包括结构尺寸检测、外观检查、性能测试等，检验规则采用GB/T 2828的抽样方案，按不合格分类进行评定。该标准适用于电流表的质量检测和等级评定。
Key Sentences extracted from text
电流表的基本误差在刻度盘工作部分所有分度线上为两上限绝对值之和的±7.5%。
电流表应能承受试验参数符合表1的定频振动和表2的扫频振动。
电流表应能承受电流循环变化的试验。循环变化次数应符合表5的规定。
湿热型电流表应能承受高温温度40℃、6个周期循环的交变湿热试验。
本标准按GB/T 2828规定的一次正常抽样方案。并规定使用一般检查水平Ⅱ。
The basic error of the ammeter at all scale divisions of the working part of the dial is ±7.5% of the sum of the absolute values of the two upper limits.
The ammeter shall withstand fixed-frequency vibration with test parameters conforming to Table 1 and sweep-frequency vibration conforming to Table 2.
The ammeter shall withstand a test of current cycling. The number of cycles shall conform to the provisions of Table 5.
The damp-heat type ammeter shall withstand a damp-heat cyclic test at a high temperature of 40°C for 6 cycles.
This standard adopts the single normal sampling plan specified in GB/T 2828, and specifies the use of general inspection level II.
Standard Timeline
Changes from replaced version:
- 取消了冲击和绝缘介电强度项目
- 增加了耐电压、交变湿热和耐盐雾项目
- 在耐振动项目中增加了扫频振动
- Removed the items of impact and insulation dielectric strength
- Added items of voltage withstand, damp-heat cycling, and salt spray resistance
- Added sweep-frequency vibration in the vibration resistance item