Ametek LAND R1500T, User Manual, Page: 7 / 28

User Guide Landcal Blackbody Source
Type R1500T
Page 1
1 Introduction
The LANDCAL blackbody type R1500T provides a temperature source for the on-
site or in-laboratory calibration of radiation thermometers up to a temperature
of 1500°C (2750°F). The source has been designed primarily for the calibration
of short wavelength thermometers (silicon cell and Germanium detectors)
but it can also be used for thermometers fitted with other types of detectors.
However when the calibration of longer wavelength thermometers are checked it
is recommended that the calibration by comparison method is adopted.
Calibration is made by comparing the output from the thermometer under test
with the target temperature.
The target temperature can be measured in 3 ways:
1) If traceability to national standards is not required, a check on the
thermometer can be conducted by using the controller indication. From
previous work, the indicated temperature has been found to agree with the
radiance temperature to within ±10°C at 1000°C when using thermometers
operating at short wavelengths.
2) The temperature of the target can be measured by using a radiation
thermometer of similar detector and optical characteristics, the calibration
of which is traceable to national standards. This method of calibration
can be described as calibration by comparison with a standard radiation
thermometer.
3) Prior to supply, the relationship between the indicated controller
temperature and the true radiance temperature, as measured by a
secondary standard radiation thermometer, will have been determined
and reported in a traceable calibration certificate for the source. The
temperature of the target is determined using the controller indication and
corrected for any errors as reported in the certificate.
A UKAS (United Kingdom Accreditation Service) Certificate of Calibration is
available from LAND Instruments International for either the source or the
radiation thermometer.