LumaSense technologies ISR 320, Руководство пользователя

Страница: 27 / 40

ISR 320 Manual Maintenance
•
27
6 Maintenance
6.1 Cleaning ISR 320 Window
Because there are no moving parts in the ISR 320, the only regular maintenance required is a
periodic inspection of the front window for build-up of foreign particles, which, in time, can
influence the energy received by the instrument. The ISR 320 has a “Dirty Window” warning
alarm feature that can measure the current window/optical path transmission and provide a
contact closure alert when the window transmission falls below the user set point.
The ISR 320 window is not water-soluble and; therefore, can be cleaned with standard lens
tissue dampened with a camera-store lens-cleaning solution. A soft blower/brush (also at camera
stores) should be used to remove any grit on the window before you rub the lens with lens
tissue and solution.
Attention: NEVER CLEAN THE ISR 320 WINDOW WITH A DRY TISSUE OF ANY
KIND!
The only time dry lens tissue may be used is to dry a window which has already
been cleaned with wet lens tissue.
6.2 Calibration
LumaSense calibrated your pyrometer at the factory and delivered your instrument with a
Works Certificate. Normally we advise against changing the factory set calibration. If you believe
that the calibration may have changed, perhaps because your operating environment is severe,
an approximate field (on-site) calibration is possible. You have the choice of an on-site
calibration or arranging a more precise calibration at the LumaSense factory.
6.2.1 Laboratory Calibration
Contact LumaSense for information about calibration at the LumaSense factory. For most of our
customers who do not have large numbers of infrared thermometers in service, we recommend
that our laboratory be chosen to do calibration. When you have many infrared thermometers,
you may find it most convenient and economical to have your own calibration laboratory.
LumaSense has a variety of blackbody calibration sources including very economical ones.
Among these you may find the source most suitable for your own laboratory.
6.2.2 On-Site Calibration
See the Chapter 9: Troubleshooting in this manual before attempting to perform your own
calibration. The instrument was calibrated at the factory to its original accuracy as stated.
Nearly all erroneous temperature readings are caused by application problems such as:
•
Emissivity Factor: Carefully read “Emissivity Slope K” found in section 4.2 of this
manual for information on this topic. Also use the InfraWin “K: AutoFind” function as
described in the InfraWin manual to determine the actual emissivity ratio of the target.
•
Reflections: Unexpectedly high readings may be caused by the ISR 320 “seeing” a
reflection of another hotter source, especially if the target emissivity is less than 0.8.