6ES5375-8LA12 三位式调节是为了克服二位式调节容易产生的升温速度与温度过冲量(超调)之间的矛盾而发展的一种调节方式.以电炉加热为例.三位式调节可以用两个继电器的触电组成”升温加热”、 “恒温调节”以及 “停止加热”三种输出状态.
    具体实现方法为采用辅助加热器A和主加热器B两组加热器,当测量值低于下限设定值时,上、下限继电器均吸合,系统进入”升温加热”状态,此时A,B二组加热器同时加热,因此升温速度较快.
    6ES5375-8LA12当测量值到达下限设定值,当尚低于上限设定值时,下限继电器释放,断开辅助加热器A的能源供给,升温效率随之下降,系统进入 “恒温加热”状态.
   6ES5375-8LA12 当测量值到达上限设定时,下限继电器仍保持断开状态,上限继电器开始释放,断开主加热器B能源供给.此时由于主辅加热器均失去能源供给,故温度逐渐下降,直至降到上限设定回差的下限时,上限继电器又吸合,接通主加热器B的能源供给,温度又逐渐上升,周而复始,由此可见三位式调节比二位式调节升温的速度快,进入恒温调节状态后温度的波动小,精度高.

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 6ES5375-8LA12
6ES5375-8LC11
6ES5375-8LC21
6ES5376-1AA11
6ES5376-1AA21
6ES5376-1AA31
6ES5377-0AA11
6ES5377-0AA21
6ES5377-0AA32
6ES5377-0AA41
6ES5377-0AB21
6ES5377-0AB31
6ES5377-0AB41
6ES5377-0BA31
6ES5377-0BB41
6ES5380-8MA11
6ES5385-8MA11
6ES5385-8MB11
6ES5390-0UA11
6ES5393-0UA14
6ES5393-0UA15
6ES5396-0UA11
6ES5420-4UA13
6ES5420-4UA14
6ES5420-7LA11
6ES5420-8MA11
6ES5421-8MA12
6ES5422-8MA11
6ES5430-2BA11
6ES5430-4UA13
6ES5430-4UA14
6ES5430-7LA12
6ES5430-8MB11
6ES5430-8MC11
6ES5430-8MD11
6ES5431-2BA11
6ES5431-2CA11
6ES5431-4UA12
6ES5431-7LA11
6ES5431-8FA11
6ES5431-8MA11
6ES5431-8MC11
6ES5431-8MD11
6ES5432-4UA12
6ES5432-7LA11
6ES5433-3BA11
6ES5433-8MA11
6ES5434-4UA12
6ES5434-7LA12
6ES5435-4UA12
6ES5435-7LA11
6ES5435-7LB11
6ES5435-7LC11
6ES5436-4UA12
6ES5436-4UB12
6ES5436-7LA11
6ES5436-7LB11
6ES5436-7LC11
6ES5437-8EA12
6ES5440-8MA11
6ES5440-8MA12
6ES5440-8MA21
6ES5440-8MA22
6ES5441-4UA13
6ES5441-4UA14
6ES5441-7LA11
6ES5441-7LA12
6ES5441-7LA13
6ES5441-8MA11
6ES5450-8FA11
6ES5450-8FA12
6ES5450-8MB11
6ES5450-8MD11
6ES5451-2BA11
6ES5451-2CA11
6ES5451-4UA13
6ES5451-4UA14
6ES5451-7LA11
6ES5451-7LA12
6ES5451-7LA21
6ES5451-8MA11
6ES5451-8MD11
6ES5451-8MR12

DETECTOR HPLC UV975
JDS FITEL SB SERIES FIBER OPTIC SWITCH SB02B5-C2FP 100-240V
JDSU ACTERNA QT-200 DSL TEST HEAD
JDSU ACTERNA TTC FIREBERD 500 2GB-HDD 166MHZ-CPU 32MB-RAM INTERNETWORK ANALYZER
JDSU ACTERNA TTC PR2000 ASCII THERMAL PRINTER
JDSU TTC T-BERD 105 T-CARRIER MONITOR
JENCO PH-VISION 6091 RS-232C DATALOGGER MICROCOMPUTER
JEOL JSM-T330A ELECTRON SCANNING MICROSCOPE UNIT SET
Jetter JetMove 600 JM-603-480-SB1
JETTER SERVO MOTOR JLS-6800-162-3RVP Nr 212831 SHAFT DIA 38MM
J-KEM SCIENTIFIC MODEL 100-JKT THERMOCOUPLE METER P/N 100-2820
J-KEM SCIENTIFIC MODEL 210 TIMER THERMOCOUPLE UNIT
JOHNSON-JOHNSON VITROS SYSTEM DT60 II CHEMISTRY
JT-19 TRUE RMS DIGITAL MULTIMETER GOOD CONDITION
JVC COLOR VIDEO CAMERA DIGITAL MODEL : TK-C921EG
JVC TK-C720E COLOR DIGITAL VIDEO CAMERA W/ COMUTAR LENS
Kappler LS417 NexGen 2X Coveralls Case of 25
Karl Storz 27085 K ultrasonic generator
KARL-STORZ ENDOSKOPE FLASHGENERATOR 600 BA
K-B AEROTECH MODEL 800 MULTISCANNER S/N 0116
KB ELCTRONICS KBLC-240DS 9116 DC MOTOR SPEED CONTROL
KB ELECTRONICS KBLC-240DS 6017 DC MOTOR SPEED CONTROL
KCI Freedom V.A.C VAC FREEDOM Portable System WITH battery operated unit
KCI V.A.C ATS Clinical advantage Wound Suction Pump , battery operated unit
Kd SCIENTIFIC 780230 MULTIPLE TUBE DISPENSE REMOVE PUMP SYSTEM
Keeler Ophthalmoscope Otoscope fiber optic and keeler vista 20 w/ power supply
KEITHLEY 175 AUTORANGING MICROVOLT DMM
Keithley 175A AUTORANGING Digital Multimeter
KEITHLEY 196 6.5 DIGIT SYSTEM DMM
Keithley 2361 Trigger Controller unit good unit
KEITHLEY 487 PICOMMETER / VOLTAGE SOURCE
KEITHLEY KEITHLEY 740 SYSTEM SCANNING THERMOMETER WITH 7402 THERMOCOUPLE .
KELLER MODEL NO PD 10 AF 4
KEMA-KEUR CAMERA POWER SUPPLY 240VAC 50Hz.
Kendall SCD SEQUEL Compression Pump 6325
KENSINGTON LABS AXIS BOARD 4000-60002 BOARD CARD
KENSINGTON LABS AXIS BOARD 4000-60010 BOARD CARD
KENWOOD AG-203A OSCILLATOR 600ohm output
KENWOOD AG-203D OSCILLATOR SIGNAL GENERATOR
KENWOOD CS-5175 100MHZ OSCILLOSCOPE
KENWOOD CS-5375 100MHZ THREE CHANNEL OSCILLOSCOPE
KENWOOD CS-6040 150MHZ READ OUT OSCILLOSCOPE
KENWOOD CV-1245 PAL WAVEFORM