INTRODUCTION
Thank you for purchasing General Tools & Instruments’ UV254SD UVA and UVC Light Meter
with Datalogging SD Card. Please read this user’s manual carefully and thoroughly before
using the instrument.
Many industrial and commercial applications require or can benefit from measurement of
the intensity of UVA and/or UVC light. Among them are welding (to minimize exposure to
“blue light” radiation), UV sterilization of food, photochemical matching, erasure of
electrically programmable read-only memory (EPROM) chips, production of graphic arts
products, exposure of photoresists, and curing of inks, adhesives and coatings.
The UV254SD has the performance and features needed to satisfy the most demanding
aspects of these applications. For example, it combines the capabilities of UVA (black light
in the long-wave 365-nm band) and UVC (short waves in the 254-nm band) measurement
in one instrument. The meter also can measure surface temperature, if mated with a Type K
or Type J thermocouple. A UVA probe and a UVC probe are supplied with the instrument.
Because it is microprocessor-based, the UV254SD can make full use of the portability,
reliability and large storage capacities that SD memory cards offer. Measurements of light
intensity or temperature can be made automatically at any of 11 sampling rates between
one second and one hour. After time-stamping and storing the measurements on an SD
card plugged into the instrument (a process called datalogging), the user can remove the
card and transfer the measurements to a laptop or desktop computer either directly or via a
USB card reader.
The UV254SD has a backlit 2-1/2 in. diagonal display and is powered by six “AA” Alkaline
batteries or an optional 9-VDC AC adapter.
KEY FEATURES
• Includes UVA and UVC probes
• Measures light intensity within two automatically switched full-scale ranges:
2 mW/cm
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and 20 mW/cm
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• Displays maximum and minimum readings
• Performs real-time automatic datalogging at sampling time settable from
1 second to 1 hour
• Also supports manual logging and changing of card storage location
• Comes with 2 GB SD memory card, but works with cards up to 16 GB
• Big (2.5 in. diagonal) front-panel green backlit LCD is easy to read
• Auto power off function
• Powered by six “AA” batteries or 9V AC/DC adapter
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