| general features & specifications | 一般功能和規(guī)格 | |
| | | | |
| | ar-842a | ar-852a | ar-872s |
| temperaturerange | -18℃～330℃ | -18℃～500℃ | -18℃～1050℃ |
| 測溫范圍 | 0～626℉ | 0～932℉ | 0～1922℉ |
| accuracy | ±2%or±2℃ | ±2%or±2℃ | ±2%or±2℃ |
| 測溫精確度 |
| ℃/℉ se-lection | √ | √ | √ |
| ℃/℉溫度單位轉(zhuǎn)換 |
| distance spot ratio | 12:1 | 12:1 | 12:1 |
| 測量距離比率 |
| data hold function | √ | √ | √ |
| 數(shù)據(jù)保持顯示功能 |
| auto power shut off | √ | √ | √ |
| 自動關(guān)機功能 |
| emissivity | √ | √ | √ |
| 發(fā)射率 |
| backlight display se-lection | √ | √ | √ |
| 背光顯示選擇功能 |
| laser target pointer se-lection | √ | √ | √ |
| 鐳射目標顯示選擇功能 |
| average and difference function | √ | √ | √ |
| 平均值和溫差測量功能 |
| max and min function | √ | √ | √ |
| 最大、最小值測量功能 |
| high low temperature alarm setup | √ | √ | √ |
| 高低溫報警設定功能 |
| data store/recall function | √ | √ | √ |
| 測量數(shù)據(jù)儲存功能（斷電記憶） |
| response time & wavelengh | 500ms & (8-14)um | 500ms & (8-14)um | 500ms & (8-14)um |
| 響應時間和響應值長 |
| repeatability | ±1%or±1℃ | ±1%or±1℃ | ±1%or±1℃ |
| 重復性 |