EDH0170FE1010 – 09/98
22
LDS1000 Controller for Laser Diode Sensors
7.4.1.3
Display of Result in Arc-Seconds (LDS-Vector)
=>
(
F4
) =>
(
F1
) =>
(
F1
)
The calibration certificate gives the values Ycoef, Zcoef, Yincr and Zincr for
result display in µrad. In general, Yincr and Zincr are equal to 1. The resolu-
tion of the display is then 0.1 µrad.
To display the result in arc-sec:
1 arc-sec = 4.85 µrad
1 µrad = 0.2062 arc-sec
Thus: Y µrad = (0.20
x
1.0309
x
Y) arc-sec
Thus we will use the increments Yincr = 0.2 and Zincr = 0.2. That gives dis-
play limits of -400 to + 400.
The values Ycoef and Zcoef are corrected by 1.0309:
Ycoef
1
= Ycoef
x
1.0309 (rounded to the nearest unit).
Zcoef
1
= Zcoef
x
1.0309 (rounded to the nearest unit).
The unit sec will be chosen.
You are advised not to delete the initial parameters, in µrad. You only need
to program a new sensor number.
7.4.1.4
Programming a New Sensor
When an LDS-Vector autocollimator is delivered with its electronic control-
ler, the sensor parameters are fed into the memory of the controller. The
number 0 is used for the current sensor.
The other memories are normally empty, and the values of the parameters
are therefore equal to the default values.
To program a new sensor, a spare place must be found, generally recogni-
zable when S/N = 000000. You can choose to delete an existing sensor.
Access to the mode that enables rapid visualization of the various heads is
obtained by the sequence:
=>
(
F4
) =>
(
F1
) =>
(
F3
)
It is then possible to modify the number of the current sensor:
(
F2
)
Previous number (-1).
(
F3
)
Next number (+1).
(
F4
)
Visualization of parameters of the sensor envisaged.
(
F5
)
Save the new configuration.
Programming the new sensor is done by the
menu (see modification
of sensor parameters).
