15.5 Determination of Slope
The following slope settings (applicable for sensors in 2-color mode) are approximate and will vary depending on
the metal alloy and surface finish, as well as the application. These are supplied here as examples.
Set the slope to approximately 1.000 for measuring the following metals with oxidized surfaces:
• Stainless Steel
• Cobalt
• Steel
• Iron
• Nickel
Set the slope to approximately 1.060 for measuring the following metals with smooth, clean, unoxidized surfaces:
• Iron
• Nickel
• Tantalum
• Stainless Steel
• Tungsten
• Cobalt
• Steel
• Molybdenum
• Platinum
• Rhodium
Molten iron also has an approximate slope setting of 1.060.
How to determine slope?
The most effective way to determine and adjust the slope is to take the temperature of the material using a probe
sensor such as an RTD, thermocouple, or other suitable method. Once you determine the actual temperature,
adjust the slope setting until the sensor’s temperature reads the same as the actual temperature reading. This is
the correct slope for the measured material.
Alternatively you can also use the sensor’s matching function, see section 6.2.3 Unit Setup Menu, page 49.
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