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3.2 Adjusting the Default Sensitivities
Using the program mode, the detection threshold for setting 7 can be adjusted to make the sensor more
or less sensitive. Because there is some noise in the readings, the threshold can only be set as low as 10.
The threshold for each sensitivity dial setting is automatically calculated by doubling the threshold from
the next most sensitive setting. The net result is that each dial setting is twice as sensitive as the
previous setting.
4 Operating Modes
There are several operating modes that can be entered while the sensitivity dial is in position 0. The
sensor will not start operating in a given mode until the sensitivity dial is set to a non-zero position.
Before connecting the Sasquatch to a controller, the mode must be set to back to Normal. If the mode
is not set to Normal, the detection algorithm will not run and the COM port will be setup to interact with
ETC Vision instead of running the Modbus slave. Data transmitted out the COM port will cause a
controller to interpret it as an arrival.
4.1 Normal
This is the mode that each sensor is shipped in by default. When the sensitivity dial is set to any number
other than 0, the sensor will take magnetic readings, calculate a baseline and compare the current
reading to see if it has surpassed the threshold. When the threshold is exceeded, the velocity is
calculated and stored in a Modbus register that can be read from the RS-485 port and the switch is
closed on the SIG wire. (See 5.2 Output Switch - Modes of Operation).
ETC Vision provides a SCADA viewer to view and modify registers on the Sasquatch when it is operating
in Normal Mode
4.2 Capture - Full Debug
This mode will run just like the normal mode, except the RS-485 port is used to stream live data to ETC
Vision. This data includes the current readings, baseline, current switch position and velocity. Run a
capture in ETC Vision to see the real time stream of these values.
4.3 Capture - Raw Samples
The Raw Samples mode is similar to the Full Debug mode. It will take magnetic readings and stream
data that is captured by ETC Vision. The difference is that no other filtering or calculations is done on
the data before being sent to ETC Vision. This mode essentially eliminates all internal algorithms to give
an accurate picture of the readings coming from the magnetic sensor.
3
T x 16
2
T x 32
1
T x 64
7
400
800
1600
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