ISR 12-LO • IGAR 12-LO Operating Manual Introduction • 9
2 Introduction
2.1 Appropriate use
The pyrometers ISR 12-LO and IGAR 12-LO are digital, highly accurate 2-color pyrometers with
fiber optic for non-contact temperature measurement on metals, ceramics, graphite etc.
between 300 and 3300 °C.
The pyrometers measures in the 2-color principle (ratio principle) in which two adjacent
wavelengths are used to calculate the temperature. This technique offers the following
advantages compared with the standard one-color pyrometers:
• The temperature measurement is independent of the emissivity of the object in wide
ranges.
• The measuring object can be smaller than the spot size.
• Measurements are unaffected by dust and other contaminants in the field of view or by
dirty viewing windows.
Additionally, the pyrometer can be switched to 1-color mode and used like a conventional
pyrometer.
The metal mode allows measurements of metals and alloys with unknown K-factor (emissivity
slope).
The instrument is equipped with an optical fiber (length up to 30 m), which can be used in very
high ambient temperatures up to 250 °C without cooling and it is unaffected by electromagnetic
interferences.
2.2 Scope of delivery
Pyrometer, optical fiber and optical head as per configuration, works certificate, PC software
InfraWin, and user manual.
Note: The connection cable is not included with the instrument and must be ordered
separately (see section 8, Reference numbers).
2.3 Technical data
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