UA-6 Detector
Section 1 Introduction
1-3
Table 1-1 Technical Specifications for the UA-6
Dimensions and Weight
(Detector cabinet only)
Width: 11.2 in (28.4 cm)
Height: 6.5 in (16.5 cm)
Depth: 13.0 in (33.0 cm)
Weight:14.6 lb (6.6 kg)
Power Requirements
Mains voltage line cord is a
“disconnect device”
(Factory Set)
100 VAC ± 10 VAC, 0.4 Amps
117 VAC ± 10 VAC, 0.4 Amps
234 VAC ± 23 VAC, 0.2 Amps
Line Frequencies
50 Hz or 60 Hz (field convertible)
Power Consumption (maximum)
50 watts (117 VAC, 60 Hz), Type 11
Ambient Temperature Range
0 to 40° C
Humidity
5 to 25° C, 0 to 100% relative humidity maximum with heaters ON
(Type 11 and 12 optical unit)
10 to 40° C, 0 to 95% relative humidity maximum with heaters OFF
(Type 11 and 12 optical unit)
Full-Scale Absorbance
0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 0.5, 1.0, 2.0 Absorbance
Units Full-Scale (AUFS)
Linearity
± 1.5% of full-scale
(maximum deviation measured at mid-point of 2.0 absorbance range)
Noise Specifications for the Type 11
Optical Unit
±10 x 10
-5
AU - 280 nm
±10 x 10
-5
AU - 254 nm (Reference 8 x 10
-5
ASTM)
(All noise specifications are for 95% total trace with dry PREP flow cells,
and 1.5 second RISE TIME setting, reference 1.5 cm/hr chart speed.)
Accuracy (Relative)
3% of full-scale, all ranges
Range-to-Range Tracking
2% of reading
Noise Filter
Bessel (time delay) type. Selectable 0.5, 1.5, and 5.0 seconds RISE TIME
settings (10 to 90% full-scale response).
Stability
(baseline drift after 8 hour warm-up at
constant ambient temperature)
Type 11 optical unit:
2 x 10
-3
AU maximum in 4 hours, 254 or 280 nm wavelengths.
4 x 10
-3
AU maximum in 4 hours, all wavelengths.
(measured with dry prep flow cells and the same wavelength in both
optical beams)
Recorder Outputs
0 to
1 V
1% into 100K ohms or greater.
0 to
10 mV
1% into 1K ohms or greater.
Zero common mode voltage.
Recorder Input
1 V maximum internal recorder input
Integrator Output
1.0 VDC/Absorbance unit;
3% of scale plus
2% of reading
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