| General Installation Procedures 1. Always Mount the Mini-S in a suitable dry location. The Mini-S is designed to be used in indoors or protected environments only. Excessive moisture in the circuit board and transducer will result in damage and improper operation, and will void all warranties. 2. Mount the Mini-S as far off the ground as practical. 3. Adjust the gain to the Minimum setting necessary to insure reliable target detection (excessive gain can result in false detections). 4. Mount the Mini-S in a location where environmental interference sources are Minimized (examples are EMI sources, air industrial nozzles, excessive air turbulence, etc.) 5. The two (2) NPN open collector digital outputs require pull-up resistors to an external positive power source of less than 40 VDC (typically 4700 ohms when connected to +5 VDC for interfacing to TTL circuits). 6. The Trigger Enable and External Trigger pins can be left un-connected when the External trigger option is not desired, Calibration Procedures 1. Apply DC power ( +8 to +24 VDC) to the MINI-S (connector header pin 1) 2. Allow several minutes warm-up time the MINI-S to reach operating temperature before calibrating the unit. 3. Setting Output 1: Place the target at the desired detection distance from the face of the MINI-S Depress the "RANGE SET 1" push button, and wait for the LED indicator to stop flashing and the sensor's transducer generates a "chirp" sound before releasing. The MINI-S is now calibrated to your desired target distance for Output 1. 4. Setting Output 2: Place the target at the desired detection distance from the face of the MINI-S. Depress the "RANGE SET 2" push button, and wait for the LED indicator to stop flashing and the sensor's transducer generates a "chirp" sound before releasing. The MINI-S is now calibrated to your desired target distance for Output 2. 5. Gain Control: The MINI-S gain was pre-set at the factory for optimum performance. To re-calibrate the GAIN potentiometer setting, place the target at the maximum desired detection distance. Rotate the GAIN potentiometer fully counter-clockwise (CCW). Slowly rotate the GAIN control clockwise (CW) until detection occurs. Rotate the Gain control CW an additional 1/16 turn. Note: Always calibrate the GAIN control for Minimum gain required for reliable detection. Excessive gain may result in false target detection. System Wiring Information Pin 1 - Power Supply-----Requires a +8 to +24 VDC regulated power source with a 30 mA current capacity. Pin 3 - External Trigger--Accepts TTL compatible logic level clock signals (0-5 VDC). Trigger occurs on the Low to High logic transition. Pin 4 - Trigger Enable-—Allows the MINI-S to accept an external trigger signal. Enable by connecting pin 4 to pin 2. Pin 5 - Clock Output------Delivers a TTL compatible clock signal (0-5 VDC). This signal goes high at the start of a cycle, and returns to a low state when the returned echo from a target is detected. Pin 6 - NPN Output 1-----This NPN open collector output turns on and off when a target is detected (on) or missing (off) as set by the adjusted Range Control 1 setting. Pin 7 - NPN Output 2-----This NPN open collector output turns on and off when a target is detected (on) or missing (off) as set by the adjusted Range Control 2 setting. NPN open collector outputs are continuously energized during the detection period. The outputs switch on (NPN low output to common) when the sensor detects three consecutive target present at the range control set point. The outputs switch off (open collector output) when the sensor detects three consecutive missing targets at the range control set point. |