OPS-UM-001-C User Manual
OmniPreSense Corporation
4
Default Settings
The default settings of the sensor are set to provide solid performance over a wide range of applications.
Upon power-up the default settings are used, and operation begins. Future updates will allow the module
to retain the settings of the sensor from the last operation. The default settings are listed in Table 1.
Table 1. Default Settings
API Command
API Command
Default Value
Output Units
UM
m/s
Data Accuracy
F2
2
Sample Rate
SX
10,000
Sample Buffer Size
S>
1024
Reported Speed Filter
R=
n
Off
Reported Direction Filter
R|
Off
Quash Noise
On
JSON Output
Oj
Off
LED Control
OL
On
Magnitude Report
Om
Off
Number Reports
O
n
1
Raw Data Output
Or
Off
Speed Report
OS
On
Time Report
Ot
Off
Module Power
PA
Active
Operating Range
The maximum speed reported is determined by the Sampling Frequency. For slow moving objects, a
sample rate of 5,000 (SV command) is perfectly fine. The default setting of 10,000 (SX command) provides
a detectable speed of up to 31.1 m/s (69.5 mph) while 20,000 (S2 command) provides up to 62.2 m/s
(139.1 mph). The accuracy of the reported speed increases as the sample frequency goes down. The
range of values is summarized in Table 2.
Table 2. Maximum Operating Speeds
Sample
Frequency
API
Command
Maximum
Speed (m/s)
Maximum
Speed (mph)
Accuracy*
(m/s)
Accuracy*
(mph)
1,000
SI
3.1
7.0
0.006
0.014
5,000
SV
15.5
34.8
0.030
0.068
10,000
SX
31.1
69.5
0.061
0.136
20,000
S2
62.2
139.1
0.121
0.272
50,000
SL
155.4
347.7
0.304
0.679
100,000
SC
310.8
695.4
0.608
1.358
* 1024 buffer size, 512 buffer size accuracy will be twice these values
