Rotary Chair Nydiag 200
Page
25
The eye movements are measured as soon as the stimulation has been terminated. During the
measurement the chair should not be moving at all (=
Stop time t2
). After that, the chair can be
moved manually by clicking the
Zero position
button, or automatically if the
Move to zero after
test
box has been ticked.
Testing the Trapeze Function:
Velocity °/s
–
constant velocity during “stable time”
Acceleration °/s²
–
linear increase in velocity up to peak velocity
Stable time
–
period of constant velocity
De-acceleration
–
linear decrease in velocity before complete stop.
Stop time
–
pause before next cycle is initiated
Maximum acceleration is 100°/S² and must never exceed this value.
1.
Velocity: does the chair move faster with increasing values for velocity? Compare values
20°/s with 100°/s
2.
Acceleration: Check that low values (such as 10°/s²) produce soft acceleration and that high
values (such as 50°/s²) produce abrupt acceleration.
3.
Stable time: Enter the value „50‟ in the
Stable Time t1 box and measure the duration of the
Stable time period
4.
De-acceleration: Does the chair de-accelerate faster from one cycle to another with values
>1 entered in the acceleration change box?
5.
Cycles: check that the chair performs the number of cycles ordered. One cycle is the
combined duration of acceleration, stable time and de-acceleration.
After clicking the ok-button the program must be left pressing the EXIT and save button. The program
now saves the parameters which have been used last.