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| GENERAL FEATURES & SPECIFICATIONS | 一般功能和规格 |  
|  | AR-813 | AR-833 | AR-823 |  |  
| Measuring Range | 1~100,000lux | 0.01~50,000lux | 1~100,000lux |  |  
| 测量范围 |  |  
| Accuracy | <4%rgd±0.5%f.s | <3%rgd±0.5%f.s | <3%rgd±0.5%f.s |  |  
| 测量精确度 |  |  
| Unit Selection | Lux | Lux | Lux/Fc |  |  
| 单位转换 |  |  
| Measure Level Seletion | Auto | Auto | Auto/MANUAL |  |  
| 测量档位选择 |  |  
| Data Hold Function | √ | √ | √ |  |  
| 数据保持显示功能 |  |  
| Auto Power Shut Off | √ | √ | √ |  |  
| 自动关机功能 |  |  
| Low Battery Indication | √ | √ | √ |  |  
| 低电显示功能 |  |  
| LCD Back Light Selection | _______ | _____ | √ |  |  
| 背光显示选择功能 |  |  
| Repeatability | ±2% | ±2% | ±2% |  |  
| 重复性 |  |  
| The Change As Temperature Change | 0.1%/℃ | 0.1%/℃ | 0.1%/℃ |  |  
| 温度特性 |  |  
| Samping Frequency | 1.5times/sec | 1.5times/sec | 1.5times/sec |  |  
| 取样率 |  |  
| Resolution | 1Lux | 0.01~1Lux | 1Lux |  |  
| 解析度 |  |  
| Response Time | 1s | 1s | 1s |  |  
| 响应时间 |  |  
| Over level Indication | √ | √ | √ |  |  
| 过载提示 |  |  
| Max And MinReading Hold Function | ____ | ____ | √ |  |  
| 最大、最小值锁定功能 |  |  |  
|  |  
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| GENERAL CHARACTERISTICS | 一般特征 |  
| Power | 9v Battery | 9v Battery | 9v Battery |  
| 供电 | 9v电池 | 9v电池 | 9v电池 |  
| LCD size | 48*31.8mm | 48*31.8mm | 59 |  |  |