| GENERAL FEATURES & SPECIFICATIONS | 一般功能和規(guī)格 |  | 
|  |  |  |  | 
|  | AR-842A | AR-852A | AR872D | 
| TemperatureRange | -18℃~330℃ | -18℃~500℃ | -50℃~1050℃ | 
| 測(cè)溫范圍 | 0~626℉ | 0~932℉ | 0~1922℉ | 
| Accuracy | ±2%or±2℃ | ±2%or±2℃ | ±2%or±2℃ | 
| 測(cè)溫精確度 | 
| ℃/℉ Selection | √ | √ | √ | 
| ℃/℉溫度單位轉(zhuǎn)換 | 
| Distance Spot Ratio | 12:1 | 12:1 | 12:1 | 
| 測(cè)量距離比率 | 
| Data Hold Function | √ | √ | √ | 
| 數(shù)據(jù)保持顯示功能 | 
| Auto Power Shut Off | √ | √ | √ | 
| 自動(dòng)關(guān)機(jī)功能 | 
| Emissivity | √ | √ | √ | 
| 發(fā)射率 | 
| Backlight Display Selection | √ | √ | √ | 
| 背光顯示選擇功能 | 
| Laser Target Pointer Selection | √ | √ | √ | 
| 鐳射目標(biāo)顯示選擇功能 | 
| Average And Difference Function | √ | √ | √ | 
| 平均值和溫差測(cè)量功能 | 
| Max And Min Function | √ | √ | √ | 
| 最大、最小值測(cè)量功能 | 
| High Low Temperature Alarm Setup | √ | √ | √ | 
| 高低溫報(bào)警設(shè)定功能 | 
| Data Store/Recall Function | √ | √ | √ | 
| 測(cè)量數(shù)據(jù)儲(chǔ)存功能(斷電記憶) | 
| Response Time & Wavelengh | 500ms & (8-14)um | 500ms & (8-14)um | 500ms & (8-14)um | 
| 響應(yīng)時(shí)間和響應(yīng)值長(zhǎng) | 
| Repeatability | ±1%or±1℃ | ±1%or±1℃ | ±1%or±1℃ | 
| 重復(fù)性 |