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Monochromators
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Holographic, dual gratings, Czerny-Turner mountings with 1200 grooves/mm. Five-phase step motor control with minimum step size of .05 nm.
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PMT
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Hamamatsu R562HA
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Wavelength Readability
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< ± 0.05 nm
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Wavelength Range
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190 - 900 nm
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Wavelength Accuracy
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< ± 0.2 nm
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Wavelength Precision
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< ± 0.1 nm
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Wavelength Resolution
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< 0.3 nm (measured at the half-peak height of 486 nm deuterium emission line)
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Slit Width Range
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< .0.01 nm to 15.0 nm, continuously variable
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Stray Light
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at 200 nm: < 0.02%
at 300 nm: < 0.03%
at 700 nm: < 0.01%
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Photometric Ranges
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Absorbance Range: -3.0 to 3.0 Au
Maximum Sensitivity: 0.001 Au full scale
Baseline Offset: -3.0 to 3.0 Au;
Transmittance Range: 0 to 100%
Maximum Sensitivity: 0 to 0.1% full scale
Baseline Offset: 0 to 100%
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Photometric Accuracy
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Deuterium Lamp Supply: current-regulated pulse width modulator with full line isolation. Automatic warmup cycle and regulated two-stage DC filament source for use with 10 V filament, 35 watt Hamamatsu deuterium lamps.
RMS ripple at 60 Hz: 0.01%
RMS noise at 29 kHz: 0.03%
Tungsten-Iodide Lamp Supply: High stability linear element regulator with soft-start capability. Voltage-sensed regulation.
RMS ripple at 60 Hz: 0.008%
RMS noise at <60 Hz: 0.008%
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Signal to Noise Ratio
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at 3 nm slit, 450 nm, slow filter
at 0 Å: < ±0.00005 Au;
at 2 Å: < ±0.001 Au peak to peak
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Photometric Stability
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double beam mode at 550 nm, 3 nm slit
< 0.0004 Au/hour
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Time Drive Speed
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selectable in hours, minutes, and seconds; from .01 seconds to 99 hours, 99 minutes, 99 seconds
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Wavelength Scanning Speed
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0.1 nm/sec to 20 nm/sec
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Repetitive Scanning
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Overlay and sequential with or without storage in sequential locations. Maximum is 99 scans; interval is variable up to 99 hours between scans.
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Baseline Flatness
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in double beam mode, < ±0.001 Au throughout the wavelength range, computer corrected
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Direct Concentration Display
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factor range 0.001 to 10.0
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Inputs/Outputs
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Computer: bi-directional RS-232 I/O for data output and instrument control using command strings
Plotter: RS-232 digital graphics controller
Printer: Centronics-compatible parallel ASCII
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Special Inputs
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kinetics trigger; external x- and y¹-axis inputs programmed full scale from 0.1 to 10.0 volts in 0.1 volt increments
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PMT High Voltage Supply
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DC-DC upconverter with servo loop to maintain constant reference signal level; output 200 to 1400 VDC
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Heat Output
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1000 BTU/hour
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Power Requirements
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120V, 50/60 Hz; 240V, 50/60 Hz; 1000 watts
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Dimensions
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Length: 44 inches (112 cm)
Width: 22 inches (56 cm)
Height: 21.5 inches (55 cm)
Weight: approximately 300 pounds (136 kg)
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* Quoted from original Aminco documentation.
