B & S GAUGE |
THE SAME AS AWG, AMERICAN WIRE GAUGE. |
BAKELITE |
SEE "PHENOLIC" |
BANDWIDTH |
AN "AREA" AROUND THE SETPOINT OF A CONTROLLER AT WHICH PROPORTIONAL CONTROL OCCURS. |
BAUD RATE |
STANDARD TRANSMISSION RATES FOR SENDING OR RECEIVING DATA, AND THE DATA TRANSMISSION SPEED IS EQUAL TO THE NUMBER OF BITS PER SECOND, FOR EXAMPLE: 400 BAUD = 400 BITS PER SECOND |
BCD |
SEE "BINARY CODED DECIMAL" |
BHP |
BRAKE HORSEPOWER |
BIMETAL |
TWO METALS THAT WHEN EITHER HEATED OR COOLED WARP AND CAN CAUSE OTHER DEVICES OR VALVES TO OPEN OR CLOSE |
BINARY CODED DECIMAL |
ALSO REFERRED TO IN-SHORT AS "BCD", WHICH IS A NOTATION IN WHICH THE INDIVIDUAL DECIMAL DIGITS ARE REPRESENTED BY A GROUP OF BINARY BITS. FOR EXAMPLE: 8-4-2-1 CODED DECIMAL NOTATION EACH DECIMAL DIGIT IS REPRESENTED BY FOUR BINARY BITS |
BIOS |
STANDS FOR "BASIC INPUT/OUTPUT SIGNAL" |
BIPOLARITY |
OCCURS WHEN A METER DISPLAYS BOTH POSITIVE AND NEGATIVE READINGS |
BIT |
STANDS FOR "BINARY DIGIT", ALMOST ALWAYS ASSOCIATED WITH COMPUTERS OR COMPUTER-BASED PROGRAMS. EXAMPLE: 8 BITS = 1 BYTE. |
BOILER |
A CLOSED VESSEL WHERE GAS OR OIL IS BURNED IN ORDER TO GENERATE STEAM OR HOT WATER. |
BPS |
STANDS FOR "BITS PER SECOND" |
BRAKE HORSEPOWER |
THE TOTAL HORSEPOWER APPLIED TO THE DRIVE SHAFT OF ANY PIECE OF ROTATING EQUIPMENT; THE ACTUAL POWER REQUIRED TO DRIVE A FAN OR A PUMP. |
BRANCH LINES |
THE TUBING IN A PNEUMATIC CONTROL SYSTEM WHICH CARRIES THE OUTPUT SIGNAL FROM THE CONTROLLER TO THE AUXILIARY DEVICES OR ACTUATORS/OPERATORS. |
BRIDGE |
A CONTROL DEVICE THAT RECEIVES THE RESISTANCE CHANGE FROM THE SENSOR AND PRODUCES A LOW-VOLTAGE CHANGE THAT IS AMPLIFIED TO A HIGHER LEVEL WHICH BECOMES THE CONTROLLER OUTPUT. THE "BRIDGE" IS USUALLY PART OF THE CONTROLLER, OR CAN BE A SEPARATE MODULE. |
BTU |
STANDS FOR "BRITISH THERMAL UNIT", WHICH IS THE ENERGY OR HEAT THAT IS REQUIRED TO RAISE THE TEMPERATURE OF ONE POUND OF WATER 1 DEGREE (F) UNDER STANDARD PRESSURE. |
BUMP |
A SUDDEN INCREASE IN THE OUTPUT POWER INITIATED BY A TEMPERATURE CONTROLLER IN ORDER TO DETERMINE THE SYSTEM RESPONSE DURING A SELF-TUNING PROCEDURE |
BUTTERFLY VALVE |
A VALVE WHICH NORMALLY SERVES AS A FLUID-FLOW REGULATING DEVICE. ALSO, NORMALLY HAS AN INTERNAL ROTATABLE DISC. |
BYPASS CONTROL DAMPER |
A DAMPER WHICH IS MOUNTED INSIDE OF A DUCT THAT PROVIDES AN ALTERNATE PATH FOR AIR TO FLOW. |
