The radiation is captured by a diffuser mounted at the end of
an 18" long probe and delivered to the sensor through a quartz light guide
encapsulated in a metal envelope. This construction places the UV sensor far from the
point of measurement, making the probe suitable for high temperature applications, up to
400°C.The irradiance (intensity of
the UV radiation) is displayed in kW/m2 , W/cm2
or mW/cm2, user selectable. The conversion factor is:
1 W/m2 = 0.1 mW/cm2
The detector's high dynamic range allows measurement of signals as
strong as 20W/cm2 and as weak as 0.1mW/cm2 .
Automatic tracking of the minimum, maximum and average built into the
PMA2100 gives the opportunity to monitor the short term fluctuations of the UV source due
to changing line voltage, equipment configuration or inherent instability of the UV
sources
Making the best use of the UV lamp requires precise knowledge of it's lifetime. It can
be determined either by frequent spot-checks of the lamp's output or by setting the
PMA2100 in the automatic recording mode with the interval as long as 1 hour. The memory
buffer can store
up to 1024 data points, which is an equivalent of 42 days for 24
hour/day operation.
The integral (dose) of the incident radiation can be automatically measured by the
PMA2100. In order to start integrating the measured signal press the START/STOP
button. The Integrated dose as well as the integration period will be displayed on the LCD
below the main reading. A small running clock icon indicates the active integration.
Pressing the START/STOP button again stops the integration, however the dose
and time is still displayed on the LCD along with a halted clock icon. Pressing the START/STOP
button again clears the dose integration information and the cycle can be repeated.
