Pids

U-GAGE™ QT50U Series Sensors with Analog Output
Long-Range Ultrasonic Sensors with TEACH-Mode Programming

Features
• Fast, easy-to-use TEACH-Mode programming; no potentiometer adjustments • Scalable output automatically distributes the output signal over the width of the programmed sensing window. • Minimum and Maximum window limits can be adjusted independently. • Selectable 0 to 10V dc or4 to 20 mA output, selected via DIP-switch • Access to bank of 8 DIP switches through sealed cover for superior user functionality • Rugged encapsulated design for harsh environments • Unique housing design allows for multiple mounting configurations. • Choose models with integral 2 m (6.5') or 9 m (30') cable, or with Mini-style or Euro-style quick-disconnect fitting • Wide operating range: -20°to +70°C (-4° to +158°F) • Temperature compensation • Programmable for either positive or negative output slope

Ultrasonic

Models
Models
QT50ULB QT50ULBQ QT50ULBQ6 200 mm to 8 m (8" to 26')

Sensing Range

Cable*
5-wire, 2 m (6.5') cable 5-pin Mini-style QD 5-pin Euro-style QD

Supply Voltage

Output
Selectable: 0 to 10V dc or 4 to 20 mA

10 to 30V dc

* NOTES: • 9 m cablesare available by adding suffix “w/30” to the model number of a cabled sensor (e.g., QT50ULB w/30). • A model with a QD connector requires a mating cable; see page 10.

Information about discrete-output models is available on Banner’s website: www.bannerengineering.com

WARNING . . .

Not To Be Used for Personnel Protection

Never use these products as sensing devices for personnelprotection. Doing so could lead to serious injury or death. Ultrasonic Proximity These sensors do NOT include the self-checking redundant circuitry necessary to allow their use in personnel safety applications. A sensor failure or malfunction can cause either an energized or de-energized sensor output condition. Consult your current Banner Safety Products catalog for safety products which meet OSHA, ANSIand IEC standards for personnel protection. Printed in USA 03/04 P/N 70137 rev. A

Mod

U-GAGE™ QT50U Series Sensor — Analog Output
Principles of Operation
Ultrasonic sensors emit one or multiple pulses of ultrasonic energy, which travel through the air at the speed of sound. A portion of this energy reflects off the target and travels back to the sensor. The sensor measures the total timerequired for the energy to reach the target and return to the sensor. The distance to the object is then calculated using the following formula: D = ct 2 D = distance from the sensor to the target c = speed of sound in air t = transit time for the ultrasonic pulse To improve accuracy, an ultrasonic sensor may average the results of several pulses before outputting a new value.

TemperatureEffects
The speed of sound is dependent upon the composition, pressure and temperature of the gas in which it is traveling. For most ultrasonic applications, the composition and pressure of the gas are relatively fixed, while the temperature may fluctuate. In air, the speed of sound varies with temperature according to the following approximation: Cm/s = 20 √273 + TC Cm/s = speed of sound in meters persecond TC = temperature in °C Or, in English units: C ft/s = 49 √460 + TF Cft/s = speed of sound in feet per second TF= temperature in °F The speed of sound changes roughly 1% per 6° C (10° F). QT50U series ultrasonic sensors have temperature compensation available, via the 8-pin DIP switch. Temperature compensation will reduce the error due to temperature by about 90%. NOTE: If the sensor ismeasuring across a temperature gradient, the compensation will be less effective.
Current-Sourcing Models

20
Analog Output (mA)

Positive Slope

4

Near Limit Target Position

Far Limit

Voltage-Sourcing Models

10
Analog Output (V dc)

Positive Slope

Analog Output Slope
The U-GAGE QT50U sensor may be programmed for either a positive or a negative output slope, depending on...