User Guide User Guide
Page 23 Page 23
Fibroptic Thermometer
Fibroptic Thermometer
4.0 LASER ALIGNMENT UNIT
4.1 About the Laser Alignment Unit
The Laser Alignment Unit for Land UNO Fibroptic Thermometers is designed to
aid the installation of the themometer optic head by defining the target area on
which the optic head is aligned. This is particularly useful in applications where
the target size is small and/or where correct alignment is critical.
The Laser Alignment Unit may also be used for finding the correct distance from
the target at which to mount the optic head, as the laser image is sharpest at this
point. This distance may not necessarily be the nominal focal distance.
If you have a thermometer fitted with an A10 optic head, the laser image projected
by the alignment unit will be an almost full bright spot. For A25 and A50 optic
heads, the laser image will consist of many individual bright light spots, spaced
randomly within the field of view.
4.2 Laser Alignment Unit Specification
Embedded laser product classification Class 1
Laser ‘on’ duration 115 seconds
Laser pulse frequency 2.5Hz, 54% duty cycle
Emission wavelength 635nm
Thermometer performance degradation Noise, Response time and Ambient drift
increased by a factor of 2 (for bottom 5% of
span only)
Thermometer ambient temperature limits 0 to 40°C specified and operating
(operation outside these limits will greatly
reduce the life expectancy of the laser)
All other Fibroptic Thermometer specifications are unaffected by the Laser
Alignment Unit.
4.0 LASER ALIGNMENT UNIT
4.1 About the Laser Alignment Unit
The Laser Alignment Unit for Land UNO Fibroptic Thermometers is designed to
aid the installation of the themometer optic head by defining the target area on
which the optic head is aligned. This is particularly useful in applications where
the target size is small and/or where correct alignment is critical.
The Laser Alignment Unit may also be used for finding the correct distance from
the target at which to mount the optic head, as the laser image is sharpest at this
point. This distance may not necessarily be the nominal focal distance.
If you have a thermometer fitted with an A10 optic head, the laser image projected
by the alignment unit will be an almost full bright spot. For A25 and A50 optic
heads, the laser image will consist of many individual bright light spots, spaced
randomly within the field of view.
4.2 Laser Alignment Unit Specification
Embedded laser product classification Class 1
Laser ‘on’ duration 115 seconds
Laser pulse frequency 2.5Hz, 54% duty cycle
Emission wavelength 635nm
Thermometer performance degradation Noise, Response time and Ambient drift
increased by a factor of 2 (for bottom 5% of
span only)
Thermometer ambient temperature limits 0 to 40°C specified and operating
(operation outside these limits will greatly
reduce the life expectancy of the laser)
All other Fibroptic Thermometer specifications are unaffected by the Laser
Alignment Unit.
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