Catalogues - mini-a-series

Catalogue Mini-A series

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MINI-A (PB)--- page 2

Series MINI-A Instrument Grade, Environmental Grade, and Open Face Specifications

Power Requirements......8 to 24 VDC (for 5V output)

12 to 24 VDC (for 10V output) (Maximum Current = 30 mA)

Operating Temperature.........................-40 to +85° C

(-40 to 185° F)

Weight.....................................................17 grams (0.6 oz)

Dimensions

Thickness........................................0.950 inch

Diameter........................................... 1.700 inch

Mounting Diameter................................. 1.525 inch

Use RTV silicone or edge clips to secure in place

Housing, Standard Finish

Instrument Grade ...........Flat Black Cold Rolled Steel

Environmental Grade......304 Stainless Steel

Open Face........................Parylene Coated 304

Stainless Steel

Distance Ranges:

0.025 - 0.3 M.........0.15 - 6.10 M........0.3 -12.2 M

(1.0 - 12 inches)......(0.5 -20 feet).......(1.0 - 40 feet)

Accuracy (over entire range)..................± 0.1%

(0.025-0.3 M range = ± 1.0%)

Beam Pattern..........See Graph (Typically 15° nominal)

Repetition Rate (astable)........................10 Hz

May be externally triggered up to a 50 Hz rate

Output Voltage (Analog)........................0 to 5 VDC

(or 0 to 10 VDC)

Output Current (maximum).................... 5 ma

Output Response Time:

Analog output is filtered to the approximate formula:

Vout = 0.9 (Vnew value) + 0.1(Vpast avg. value⁾

Specifications subject to change without notice

General Installation Procedures

1. Always Mount the MINI-A in a suitable dry location. The MINI-A is designed to be used in indoors or protected environments only. The MINI-AE and the MINI-AO are designed for harsher environments and higher humidity conditions. Excessive moisture in the circuit board (and MINI-A transducer) will result in damage and improper operation, and will void all warranties.

2. Mount the MINI-A as far off the ground as practical, in a location where environmental interference sources are minimized (examples are EMI sources, air industrial nozzles, excessive air turbulence, etc.)

3. If necessary, adjust the gain to the minimum setting necessary to insure reliable target detection (excessive gain can result in false detections).

4. As supplied the MINI-A has been calibrated and should function without further calibration. See manual for factory settings.

Calibration Procedures (if required)

1. Apply DC power ( see requirements above) to the MINI-A (connector header pin 1)

2. Allow several minutes warm-up time for the MINI-A to reach operating temperature before calibrating the unit.

3. Connect a Dc voltmeter's (DVM) Plus (+) lead to the Analog Output (pin 6) and the DVM Minus (-) lead to Common (pin2).

4. Cover the sensor face tightly with a stiff piece of flat paper. Adjust the "SCALE Adjust" potentiometer until a +5.0 VDC (or +10.0 VDC) reading is obtained.

5. Place the target at the desired distance desired for the full scale voltage output. This can be either the minimum range or the maximum range between the sensor and the target. Depress and hold the "MAX VOLT RANGE SET" push button, and wait for the LED indicator to stop flashing and the transducer generates a "chirp" sound before releasing. The MINI-A is now calibrated to your desired target distance for full scale analog voltage output.

6. Place the target at the desired distance desired for the zero voltage output. This can be either the minimum range or the maximum range between the sensor and the target. Depress and hold the "MIN VOLT RANGE SET" push button, and wait for the LED indicator to stop flashing and the transducer generates a "chirp" sound before releasing. The MINI-A is now calibrated to your desired target distance for zero analog voltage output.

7. Gain Control: The MINI-S gain was pre-set at the factory for optimum performance. To re-calibrate the "GAIN Set" potentiometer, place the target at the maximum desired detection distance. Rotate the GAIN potentiometer fully counterclockwise (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

(the 0 to 10 VDC analog output requires a +12 to +24 VDC power source).

Pin 2 - Common------------------Common Return for Dc power supply manufacturer, analog output, and clock signals.

Pin 3 - External Trigger--------Accepts TTL compatible logic level clock signals (0-5 VDC).

Pin 4 - Trigger Enable----------Allows the MINI-A to accept an external trigger signal. Enable by connecting this pin (pin 4) to common

(pin 2).

Pin 5 - Clock Output------------Delivers a TTL compatible echo return 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 - Analog Output----------0 to +5 VDC (or 0 to +10 VDC) analog measurement output.

Pin 7 - no connection