Welch Allyn RETeval-DR, Directions For Use Manual

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Specifications
Specifications
Light source Red LED (621 nm) Green LED (530 nm) Blue LED (470 nm) White (RGB)
Flash
luminance
energies
(cd
∙
s/m
2
)
0.0001 – 15 0.001 – 17 0.0001 – 5 0.002 – 30
Background
luminance
(cd/m
2
)
0.03 – 3000 0.2 – 3500 0.03 – 1200 0.4 – 6000
To convert to Trolands, multiply luminance by the pupil area in mm
2
.
Input Type Custom 3 pin connector with positive, negative, and right leg drive signals.
Noise < 0.1
μ
Vrms at the flicker frequency for flicker protocols
CMRR > 100 dB at 50-60 Hz
Frequency Range DC-coupled
Flicker Frequency Approximately 28.3 Hz
Data Resolution Approximately 71 nV / bit
Input Range ± 0.6 V
Sampling rate Approximately 2 kHz
Timing accuracy
(electronic eye)
1
< ±0.1 ms
Timing precision
1
(human eye, 1 σ )
Typically < ±1 ms
Pupil
measurements
1.3 mm – 9.0 mm, < 0.1 mm resolution
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