5.1.3 ANALOG TO DIGITAL CONVERTER SECTION
The analog-to-digital converter uses a large-scale integrated (LSI)
circuit and changes the DC voltage into digital information. This
digital information is decoded into 7-segment information for the LED
display.
5.1.4 DISPLAY
The DMXA-Series radiometers feature a 4
1
⁄2 digit LED display that
reads directly in microwatts per square centimeter (µW/cm
2
), while
the DMHA-Series feature a 3
1
⁄2 digit LED display that reads directly in
milliwatts per square centimeter (mW/cm
2
).
SECTION VI OPERATOR SERVICING
6.1 GENERAL
The radiometer is carefully designed and constructed with high quality
components. By providing reasonable care and following the
instructions in this manual, the user can expect a long, useful service
life from the instrument.
6.2 WARRANTY
The warranty policy for the DMXA-Series and DMHA-Series radiome-
ters is provided on the Certificate of Limited Warranty enclosed sep-
arately with each unit.
NOTE: For assistance of any kind, contact the Customer Service
Department at Spectronics Corporation. In the U.S. and Canada,
call toll-free 1-800-274-8888. Give full details of the difficulty and
include the model and serial numbers of the unit and the date of
purchase. If return of the radiometer to the factory is deemed nec-
essary, shipping instructions will be provided. If an estimate of
charges for nonwarranty work or other service work is required, a
quote will be furnished upon evaluation of the unit. Service work will
not be performed without customer approval.
WARNING
The following operator servicing instructions are intended to be used
by qualified personnel for limited maintenance of the radiometer.
Do not perform any servicing other than that contained in these
operator instructions. Return the unit to the factory for other main-
tenance not covered in this section.
10
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