UCM Calibration
FlexPI Product Guide
Page 35
To calibrate the FlexPI sensor via the onboard switches:
1.
Set switch S5-4 to the ON position (switch calibration).
2.
Reboot the processor (cycle the power OFF, then ON).
3.
Toggle the on-board switches to adjust the detection parameters, gain, and filters, as required.
4.
Test the settings.
Area Preparation
See
.
Bar graph (received signal strength indicator)
For switch calibration, the bar graph provides a visual indication of the sensor cable response. The
bar graph is comprised of 10 LEDs. The 5th LED (D15) is yellow, and the 6th LED (D18) is green.
All other LEDs are red. The yellow and green LEDs are indicators of the alarm Threshold. When
the yellow LED is illuminated, the signal is just below the Threshold. When the green LED is
illuminated, the signal has exceeded the Threshold. When the Threshold is exceeded the input
(impact or sustained attack) is added to the Cut Count or Climb Time.
Note
Switch S5-4 must be set to ON to operate the FlexPI processor with
switch configuration settings.
Switch/Parameter
Parameter description
S1 Climb
(Sustained Attack)
Sets the minimum period of a sustained attack that must accumulate within the specified
Time Window to cause an alarm (0.5 to 7.5 seconds).
(A sustained attack refers to a continuous action such as drilling, boring, sawing, cutting,
digging, chiselling, climbing.) If the Time Window lapses before the Time setting is
exceeded, the processor resets both parameters.
S2 Time Window
Sets the maximum time in which the specified Climb Time must accumulate to cause an
alarm.
AND
Sets the maximum time in which the specified number of Cuts (impacts) must occur to
cause an alarm. (8 to 128 seconds)
S3 Cut
Sets the number of impacts, which must occur within the specified Time Window to cause
an alarm. (1 to 15 impacts)
S4 Gain/Threshold
Sets the processor’s input signal Gain based on the type of mounting surface and the
installation conditions. (1 = low, 4 = high)
S5 Misc
(controls)
S5-1 OFF sets the filter response to the high band (300 Hz to 900 Hz)
S5-1 ON sets the filter response to the low band (100 Hz to 300 Hz)
use the low band filter for rigid structures that do not conduct vibrations well such as
cement, brick, masonry, wood, drywall, etc.
use the high band filter for surfaces that conduct vibrations well such as fencing, sheet
metal, steel, etc.
S5-2 OFF sets the onboard bar graph to envelope mode
S5-2 ON sets the onboard bar graph to peak mode
envelope mode shows an averaged response from the sensor cables and provides the
most realistic indication of signal strength for calibration;
peak mode shows the maximum received signal strength at the processor’s sampling rate
S5-3 OFF disables the audio alarm
S5-3 ON enables the audio alarm
S5-4 OFF selects UCM calibration and UCM run-mode
S5-4 ON selects onboard switch calibration and switch run-mode
