Congratulations on choosing a Spectroline
®
DMXA-Series or DMHA-Series
digital radiometer. Spectronics Corporation has designed it to provide
the most desirable features, the best performance and, when used prop-
erly, years of trouble-free operation. Please read the instructions in this
manual carefully before using the unit.
SECTION I INTRODUCTION
1.1 GENERAL
The Spectroline DMXA-Series and DMHA-Series digital radiome-
ters provide readings from 0-19,990 µW/cm
2
or 0-199.9 mW/cm
2
(0-199,900 µW/cm
2
), respectively. They feature an easy-to-read LED
display. Their overall accuracy is better than ±5%.
These radiometers use high-quality interference filters that exhibit
accurate and carefully controlled spectral coverage, practically
eliminating unwanted meter sensitivity to infrared interference and
other undesirable radiations. This allows the readings to be obtained
directly instead of by calculation, a time-consuming and error-
producing procedure required by certain competitive devices. The
interference filters also minimize the “solarization” effect upon the
response of the meters over time.
All Spectroline radiometers are calibrated to NIST standards by pyro-
electric methods for maximum accuracy. They are designed with a
low electrical impedance, making their linearity vastly superior to
that of any other comparably priced radiometers. The sensor heads
are provided with a special diffuser-sensor window that ensures
accurate Lambertian or Cosine response.
The metering electronics of the DMXA-Series and DMHA-Series
radiometers feature better than ±5% accuracy, integrated circuitry,
and solid-state LED display. Additional features of the electronics are
excellent temperature and over-ranging characteristics. The DMXA-
Series and DMHA-Series radiometers also have built-in autozeroing.
1.2 FEATURES
1.2.1 The Spectroline DMXA-Series and DMHA-Series digital radiome-
ters are pocket-sized, battery-operated units suitable for use in the
measurement of 254nm, 300nm, 365nm or 450nm wavelengths.
1.2.2 The radiometers feature nonrechargeable and rechargeable
options. With the nonrechargeable option, the meters require four
‘‘AA’’ 1.5 volt, alkaline batteries. With the rechargeable option,
the meters require four ‘‘AA’’ 1.25 volt, nickel-cadmium batteries
and the Spectroline Model DM-15C0001 battery charger (separately
available).
3
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