Banner U-GAGE Sonic OMNI-BEAM Ultrasonic Sensors - Manual (Page 4)

Adjustment Information
4
Power Blocks with ELECTROMECHANICAL RELAY Output
Two operating parameters are programmable via a set of four DIP switches located at the base
of the sensor head (see photo, right). The four captive screws that fasten the sensor head to the
power block are loosened to gain access to the switches. The switches may be flipped up ("on")
or down ("off") using the tip of a ballpoint pen or a small screwdriver. See drawing below.
Switches #1, #2, and #3 select the number of consecutive sensing cycles required for target
presence or absence verification. This feature enables the sensor to be adjusted for smooth
response in any sensing application:
All switches "off" = 1 cycle (25ms response)
Switch #1 "on" = 3 cycles
More than 1 switch "on" = (cycle count
Switch #2 "on" = 10 cycles is additive)
Switch #3 "on" = 30 cycles Factory setting is switch #1 "on" = 3 cycles
Switch #4 selects the output control mode. Switch #4 "on" = ON/OFF mode (factory setting).
Switch #4 "off" = HIGH/LOW mode.
Sensing Window Adjustment
The LOAD indicator LED is used to locate and "size" the sensing window. The NEAR limit and
window WIDTH adjustments are 15-turn potentiometers, clutched at both ends of travel. They
are adjusted using a small, flat-blade screwdriver. Clockwise rotation of the NEAR limit
adjustment moves the near window limit farther away from the sensor, and counterclockwise
rotation moves the near window limit closer to the sensor. Clockwise rotation of the window
WIDTH adjustment increases the size of the sensing window; counterclockwise rotation
decreases the size of the sensing window. The window adjustment procedure is slightly different
for each control mode. NOTE: the TARGET PRESENT indicator LED lights whenever a target
is sensed anywhere within the 4 to 26-inch sensing range, regardless of the window adjustments.
The factory settings are:
NEAR limit = control fully counterclockwise
window WIDTH = 26 inches
NOTE: With the NEAR limit control fully counterclockwise, the sensing window width is
referenced to the sensor face (zero inches). With these limit settings, and with switch #4 at its
factory setting for ON/OFF operation, the unit will function as a presence detector over its full
sensing range (i.e. the output relay will be energized whenever a target is sensed within the
sensor's 4 to 26-inch range). The window adjustment procedures discussed below begin with
these factory settings.
Window adjustment for the ON/OFF output control mode
(programming switch #4 "on"):
1) Position the target material at the desired near limit of the sensing window. Rotate the
NEAR limit control clockwise to find the point where the load indicator just turns "off".
2) Move the target material to the desired far limit of the sensing window and rotate the window WIDTH control counterclockwise to find
the point at which the LOAD indicator just turns "off".
3) Reposition the target at the near window limit and readjust the NEAR limit control (if necessary) to re-establish the switching point.
4) Check the far window limit if any adjustments where made in step #3. Readjust the window WIDTH control, if necessary.
5) The moving-dot LED display will confirm the window dimensions by indicating the relative position of the target within the
established window, in 10% increments.
Window adjustment for the HIGH/LOW output control mode (programming switch #4 "off"):
1) Remove all objects within the sensing range. The TARGET PRESENT indicator should be "off"; the LOAD indicator should be "on".
2) Position the target material at the desired near limit of the sensing window. Rotate the NEAR limit control clockwise to find the point
at which the LOAD indicator just turns "off".
3) While keeping the target within the sensing field (TARGET PRESENT indicator always "on"), carefully move the target to the desired
far window limit. Then rotate the window WIDTH control counterclockwise to find the point at which the LOAD indicator just turns "on".
4) Reposition the target at the near limit and readjust the NEAR limit control, if necessary, to re-establish the switching point.
5) Check the far limit if any adjustments where made in step #3. Readjust the window WIDTH control, if necessary.
APPLICATION NOTES (see also page 6)
1) The sensing pattern is narrow. Flat targets must be parallel to the face of the sensor to within +/-3 degrees (depending upon target reflectivity).
2) The transducer is protected by a KAPTON
® film. However, the transducer must be kept clean and dry during operation.
3) Sensing at less than 4 inches from the face of the transducer is not reliable.