-18 °C (0 °F) to -1 °C (30 °F) ± 3 °C (5 °F)above -1 °C (30 °F) to 275 °C (525 °F) ± 2% of reading or 2 °C (3.5 °F) (With the instrument stable between 23-25 °C)
F 63, 66, 68
-32 to -26 oC (-25 to -15 oF): ±3 oC (±5 oF)-26 to -18 oC (-15 to 0 oF): ±2.5 oC (±4 oF)-18 to 23 oC (-0 to 73 oF): ±2 oC (±3 oF) For targets above 23 oC (73 oF): ±1% of reading or ±1 oC (±2 oF), whichever is greater