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INTRODUCTION
Features
· Small Size: 1.3” x 0.95” x 0.25”
· Lightweight: 0.33 ounces
· MicroCure measures total energy density in Joules/cm2
· MicroCure Plus measures total energy density in
Joules/cm2 and peak power density in Watts/cm2
· Battery powered
· High sample rate: 2000 Samples per second
· Automatic operation
· High temperature resistance
Applications
· UV systems requiring small size and automatic operation
· Small container curing (bottles, cans, etc.)
· Three-dimensional objects
· Web printing
· Very small conveyorized and batch applications
(semiconductor printing, small part bonders, etc.)
· Statistical Process Control measurements
Introduction
EIT’s new MicroCure and MicroCure Plus measurement
systems are comprised of two separate stand-alone items; the
data collection radiometer which is placed in the ultraviolet
(UV) environment to be measured, and a DataReader which
reads and displays the measurement results from the
radiometer.
The UV integrating radiometer is a microprocessor-based,
electro-optical instrument that measures and accumulates the
total UV energy that is applied to the measurement surface of
the instrument. The MicroCure radiometer measures the total
amount of UV energy that would be impinged on a work piece
passing through the curing system. The MicroCure Plus also
measures the peak UV irradiance. The radiometer combines
very small physical size and adaptability to address a variety
of demanding physical and thermal measurement
environments.
Operation
The MicroCure radiometer is designed to be placed in a
UV curing environment so that the UV radiation strikes the
radiometer in the same manner as it would strike an actual
work piece. The radiometer is designed so that when UV
strikes the measuring face of the instrument, it automatically
measures and stores electronically the amount of UV energy
impinged upon it. MicroCure Plus additionally measures the
peak UV irradiance. Upon completion of the measurement,
the operator places the radiometer in a stand-alone
DataReader. Depressing the “Select” button on the
DataReader downloads the information in the radiometer and
displays on an LCD the total UV energy seen by the
radiometer (MicroCure) or both total UV energy and peak UV
irradiance (MicroCure Plus). In the case of MicroCure Plus,
short pushes of the “Select” button toggles between the dosage
and UV irradiance measurement readings. Pressing the
“Reset” button on the DataReader will clear the electronic
storage in the radiometer and the readings on the DataReader
display. The radiometer is now ready to take another reading.
If no UV radiation above a threshold value is encountered
for four minutes, the radiometer will enter a “deep sleep”
mode. In the “sleep” mode, the radiometer batteries will last a
minimum of one year. Alternatively, the unit can make 200
measurements on the same battery.
To ensure that the radiometer battery has sufficient
remaining energy, the DataReader display indicates how many
readings have been made by the individual radiometer since
new.
The DataReader is battery powered and can perform
26,000 readings on a single battery. A low battery condition is
indicated on the display.
Applications
The MicroCure radiometer is very versatile because of its
small size and automatic operation. Exact method of use will
depend on the given application. Some specific examples are:
Small Conveyor or Batch Mode – In this application, the
radiometer is placed in the UV curing environment in the
same manner as an actual work piece. The radiometer’s very
small size and ability to withstand harsh environments
provides measurements in such previously inaccessible areas
as small conveyorized semiconductor marking, credit cards,
small part curing, etc.
Small Container Curing – UV environments encountered in
small container curing such as cosmetic or drink containers,
are generally characterized by putting the radiometer in the
place of one of the containers. In the case of cylindrical
containers like shampoo bottles, the radiometer can be
attached onto the product using EIT’s innovative Web
Accessory Kit. The radiometer can also be placed inside a
container with the measurement being made through a pre-cut
hole. The radiometer is retrieved at the end of the process and
inserted in the DataReader. The DataReader displays the
radiometer readings.
3-D Objects - Attach the radiometer to objects such as
furniture or vehicle dashboards to monitor UV levels on
unusual shapes and processes.
Web Press – In this application, the radiometer is attached and
moved from the web using a special Web Accessory Kit. The
measurement is made as the radiometer passes under the lamp
station in question. (The radiometer is placed on the web while
it is stationary or moving and removed prior to the print
station). Because of its very small size, it can pass over rollers
without damage.
Compact Disc Manufacture – The MicroCure radiometer is
sufficiently small that it can be inserted directly into one of the
CD “nests” to measure the UV radiation used to cure UV
coatings and finishes.
Flexible Light Guide Curing Systems - Some flexible light
guide systems, such as those used in curing adhesives on small
objects, are fixed into geometries that make it impossible to
place a standard radiometer in the curing region. The
MicroCure radiometer’s very small size makes such
measurements generally possible.
SPECIFICATIONS:
MICROCURE RADIOMETER
Range Low Power (-2 Version): 100mW/cm2
to 2W/cm2
High Power (-10 Version): 500mW/cm2
to 10W/cm2
Spectral Response UVA (320-390nm, 10% power points)
Sample rate 2000 per second
Total Energy 0 to 9999 Joules/cm2
Resolution 0.001 Joules/cm2
Accuracy +/- 7% typical @ 25oC, -0.2% per oC over operating range
Peak UV Irradiance
(MicroCure Plus only)
Low Power (-2 Version): 100mW/cm2 to 2W/cm2
High Power (-10 Version): 500mW/cm2 to 10W/cm2
Spatial Response Cosine approximation
Operating Temperature Range 15-70oC internal
Time-out Period Approximately 4 minutes after last UV exposure
Batteries Permanent lithium cell
MicroCure Radiometer Life 200 readings or 1 year , whichever comes first
Dimensions 1.30” long x 0.95” wide x 0.25 thick (33.00mm x 24.13mm x 6.35mm)
Weight 0.33oz (9.4 grams)
Materials Plated Aluminum, nylon
Display flashes on over-range.
Display flashes on over-ra
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UV-integrator
