- Background Suppression
- The ability of a special set of photo electric sensors to
distinguish targets against various backgrounds and of various
colors.
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- Banking Screw
- Banking screws - made of hardened steel - provide limited
mechanical protection to the inductive sensors buried therein
when hit by an object. Advantage: very robust, quick and easy
change of sensors.
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- Basic Switch
- Self-contained switching unit. It can be used alone, gang-mounted, built into assemblies or enclosed in metal housings.
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- Baud Rate
- The rate of information transfer in serial communications,
measured in bits per second.
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- Best Fit Straight Line (BFSL)
- Method for defining linearity. A straight line placed on a sensor output curve such that half the data points lie above and half below that line. The method for determining BFSL, is the sum of least squares.
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- Bias
- Compensate input for drift of an input value due to deterioration of a sensor or other cause.
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- Bidirectional Differential Pressure Sensor
- Differential pressure sensor allowing the greater input pressure to be applied to either pressure port.
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- Binary Code
- This code type is constructed similarly to the decimal
system, but has only the digit values "0" and "1".
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- Binary Coded Decimal (BCD) Code
- To avoid converting a decimal number into a binary number,
instead of using natural binary code, often only the individual
digits of the decimal number are encoded in binary.
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- Blackbody
- An ideal surface that absorbs all incident radiation,
regardless of wavelength, the direction of incidence and
polarization. It radiates the maximum energy possible for given
spectral and temperature conditions. A blackbody has an
emissivity of 1.00. See also
Emissivity.
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- Blanking
- The emitter sends a short pulsed signal with a relatively
long pause between two pulses. The light energy of the LED can
therefore be enormously increased. If emitter and receiver are
mounted in the same housing, the receiver is clocked to the
emitted pulse. Interference is therefore suppressed 98% of the
time.
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- Blind Range ST
- Reliable object recognition is not possible within the blind
range (St). Objects within this blind range may cause false
switching of the sensor.
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- Break
- To open an electrical circuit.
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- Break Distance
- Minimum distance between separated mating contacts in their fully open position.
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- British Thermal Unit (BTU)
- In specific terms, a BTU is the amount of energy required to heat one pound of water (beginning at 60 degrees F and 14.696 psia) one degree Fahrenheit. An easier way to visualize this amount of energy is to burn a standard wooden match stick. The full burning of the match stick releases approximately one BTU.
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- Bumpless Transfer
- Change from manual mode to automatic mode of control, or vice versa, without change in control signal to the process.
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- Burnout (Sensor Break Protection)
- If input fails, indicated PV signal increases (upscale) or decreases (downscale) with indication on the interface.
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- Burst Fire
- A power control method that repeatedly turns ON and OFF full
AC cycles. Also called zero-cross fire, it switches close to the
zero-voltage point of the AC sine wave. Variable-time-base burst
fire selectively holds or transits AC cycles to achieve the
desired power level.
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- Burst Pressure
- Specified pressure that will rupture the sensing element but not the sensor case.
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