NDC BETA LaserMike LaserSpeed Pro 8500-4, Инструкция по эксплуатации, Страница: 75 / 348

LaserSpeed Pro 8500-4 Instruction Handbook: Interfacing with the LS8500-4 4-27
0 2 4 6 8 10 12 14 16
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Quality Factor
A
n
a
lo
g
O
u
tp
u
t
/
V
o
lt
s
Analog Output vs Quality Factor
0 10 20 30 40 50 60 70 80 90 100
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
Analog Output vs Internal Gauge Temperature
A
n
a
lo
g
O
u
tp
u
t
V
o
lt
s
Internal Gauge Temperature °C
The LS8500's measured speed can be calculated from the analog output voltage with the following equation:
 









 






V Voltage
V Voltage
V Voltage V
when
V
V
V
V V
Voltage
Speed
FS
ZS
ZS
ZS FS
2
0
2 0
2
Where:
V
FS
= Analog Full Scale Velocity
V
ZS
= Analog Zero Scale Velocity
Voltage = Measured Analog Output Voltage
Note that when the output voltage is at either limit, the exact speed cannot be determined. If the exact speed
is always required, be sure to set the Full Scale Velocity setting to a value higher than what can normally be
encountered.
The analog port can also be configured to output the QF on a 0
–1
V scale by setting the Full Scale Velocity to zero using a serial
command or LaserTrak software. In this case, the analog output
reads 0V when the QF is 0 and 1V when the QF is 15.
When the Analog Output is configured to output Quality Factor,
the Quality Factor can be calculated with the following equation:
15
 
Voltage tor QualityFac
The analog port can also be configured to output the gauge internal
temperature on a 0-1 V scale by setting the
Analog Full Scale Ve-
locity
to one using a serial command or LaserTrak software. In this
case, the analog output reads 0V when the gauge internal tempera-
ture is 0°C and 1V when the internal gauge temperature is 100°C.
when
Speed
Quality Factor = Voltage x 15