OS523/N NEWPORT ELECTRONICS, OS523/N Datasheet - Page 72

• Manufacturer Part Number: OS523/N
• Description: Temperature Display Panel
• Manufacturer: NEWPORT ELECTRONICS

Specifications of OS523/N

• Temperature Measuring Range: -18°C To +1371°C
• Temperature Tester Type: Thermometer - Infrared
• External Height: 167.6mm
• External Width: 218.4mm
• Lead Free Status / RoHS Status: na

Method 4
Method 5
1.
2.
3.
4.
1.
2.
3.
4.
5.
Figure C-2. Determining Emissivity with a Drilled Hole
Paint a sample of the object material with flat black lacquer paint.
Set the emissivity to 0.97 and measure and record the temperature
of the painted portion of the sample material - Area ‘A’ in Figure
C-1. Make sure that the painted area of object material fills the
FOV of the thermometer.
Aim the thermometer at another spot on the target - Area ‘B’ in
Figure C-1.
Adjust the emissivity of the thermometer until the temperature
reading equals the temperature found in Step 2.
Use this method where practical to measure objects at
temperatures above 500°F (260°C).
Drill a 1.5” (35 mm) diameter hole in a sample of the object
material to a depth of 5” (127 mm). This hole closely resembles a
blackbody (refer to Appendix A).
Set the emissivity to 0.97 and measure and record the temperature
of the hole in the sample material - Area ‘A’ in Figure C-2. Make
sure that the hole fills the FOV of the thermometer.
Aim the thermometer at another spot on the target as close as
possible to Area ‘A’ (Area ‘B’ in Figure C-2).
Adjust the emissivity of the thermometer until the temperature
reading equals the temperature found in Step 3.
Area 'A' Target
Drilled out
Appendix - Determining an Unknown Emissivity
Area 'B' Target
C
C-3