| The Gemini R is a
blackbody source with which radiation pyrometers, commonly referred to
as IR sensors, can be calibrated. With a temperature range of 30 to
550°C, or 700°C, the temperature of the cavity can be set with 0.1°C
resolution. The temperature of the furnace is set and indicated on a
PID controller. An independent indicator is also provided for higher
accuracy with a standard probe, which indicates the actual radiance
temperature. Temperature variation over a 5-minute period, as viewed
on the temperature controller, is ±0.2°C and a radiation
thermometer directed into the cavity detects similar variations.
The Gemini R's
cavity's size is 2.5" Ø x 6.3" deep (65mm x 160mm). Maximum
temperature differences are ±1°C in the range of 100 to
500°C. The Gemini R is capable of accepting blackbody fixed points to
achieve the highest level of a radiation measurement possible. Typical
fixed-point uncertainties are ±0.25°C. Gallium, indium,
tin and zinc cells are available.
Emissivity is greater
than 0.995, and a calibration certificate is available for the
built-in indicator and/or supplied probe. The Gemini R can be supplied
with RS232 or RS422 communications. |
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