Spectronics DM-254XA - Page 4

2.3 INSTALLATION
The radiometer may be operated in any position without compro-
mising accuracy. The sensor probe may also be positioned at any
angle.
TABLE 1-1 TECHNICAL DATA
1.Readout Unit
Irradiance Range
DMXA-Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0-19,990 µW/cm
2
DMHA-Series . . . . . . . . . . . . . . 0-199.9 mW/cm
2
(0-199,900 µW/cm
2
)
Resolution
DMXA-Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 µW/cm
2
DMHA-Series. . . . . . . . . . . . . . . . . . . . . . . 0.1 mW/cm
2
(100 µW/cm
2
)
Display
DMXA-Series. . . . . . . . . . . . . . . . . . . . . . . . . 4
1
⁄
2
digit, 7 segment, LED
0.5 inch (12.7mm) high
DMHA-Series . . . . . . . . . . . . . . . . . . . . . . . . 3
1
⁄
2
digit, 7 segment, LED
0.5 inch (12.7mm) high
Conversion Rate. . . . . . . . . . . . . . . . . 3 readings per second nominal
Overall Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Better than ±5%
with reference to NIST standards
Temperature Coefficient . . . . . . . . . . . . . . . . . ±0.025%/°C (0 to 50°C)
2.Sensor
Spectral Ranges
DM-254XA, DM-254HA . . . . . . . . . . . . . . . 230-280 nanometers (nm)
DM-300XA, DM-300HA . . . . . . . . . . . . . . . 280-320 nanometers (nm)
DM-365XA, DM-365HA . . . . . . . . . . . . . . . 320-400 nanometers (nm)
DM-450XA, DM-450HA . . . . . . . . . . . . . . . 420-480 nanometers (nm)
Temperature Coefficient . . . . . . . . . . . . . . . . . . ±0.20%/°C (0 to 50°C)
3.Power Requirements
Battery Operation
Four nonrechargeable ‘‘AA’’ size alkaline battery cells are included
as standard.
Four rechargeable ‘‘AA’’ size nicad battery cells and a battery
recharger are available as an option.
4.Reference Conditions . . . . . . Specified on Certificate of Calibration.
5.Dimensions
Readout Unit
Length . . . . 7.25 in (18.4cm) Width . . . . . . . 3.50 in (8.9cm)
Thickness. . . . . . 2 in (5.1cm) Weight . . . . . . . . 1 lb (0.45kg)
Sensor
Length . . . . . . . . 3 in (7.6cm) Width . . . . . . . . . . 2 in (5.1cm)
Thickness. . . . 0.70 in (1.8cm) Weight . . . . . . .
1.25 oz (35.4g)
Sensor Cord Length. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 ft (0.6m)
5
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