Fluke 574 FE 574 Users Manual - Page 15

574 Emissivity - Table and Unknown Value TABLE OF VALUES To choose the emissivity 5 of a material, press EMISS (P). The display C shows a material name (7), an emissivity value, and the calculated P temperature value (5). To choose another material, 7 D use the Up and Down keys (C). Press ENTER (D) to activate this setting. UNKNOWN VALUE To adjust the unit's emissivity value for a material with unknown emissivity, plug in the probe. Pull the unit's trigger. Place the measuring tip of the probe on the area to be measured. Wait for the reading to stabilize. Note the indicated probe temperature reading. Release the trigger. Pull the trigger again. Measure the same area using infrared measurement. Press the emissivity button (P). Use the Up and Down keys (C) to select the material name "Free" which will be shown in the display (7). Press the emissivity button (P) again until the emissivity sign (5) flashes. Use the arrow keys (C) to change the emissivity value until the temperature matches the probe's reading. 15