描述
Rm為被測阻抗,當(dāng)電子開關(guān)Kd閉合時(shí)R12=R1//R2,當(dāng)Kd打開時(shí)R12=R1。Kd用于調(diào)節(jié)被測阻抗的范圍。當(dāng)R1選擇30MΩ時(shí),被測阻抗可高達(dá)lOGΩ。Usc經(jīng)分壓后送主控芯片作A/D轉(zhuǎn)換可得到含水量。
5軟件驅(qū)動(dòng)LCD
綜合測試儀要求低成本和小體積。本系統(tǒng)通過軟件由主控芯片直接驅(qū)動(dòng)LCD,省掉了LCD驅(qū)動(dòng)芯片。由于LCD必須交流驅(qū)動(dòng),所以必須在LCD的每一個(gè)段上產(chǎn)生交替變化的正向和反向驅(qū)動(dòng)電壓。綜合測試儀的LCD有三位數(shù)字顯示,共有8×3=24個(gè)顯示段。被配置成4個(gè)com和6個(gè)seg用于動(dòng)態(tài)掃描。
圖3通過coml與segl、com2與segl的輸入來說明對(duì)應(yīng)的顯示段是否被顯示。如果希望coml與segl對(duì)應(yīng)的顯示段點(diǎn)亮,而com2與segl對(duì)應(yīng)的顯示段熄滅,則coml與segl應(yīng)有相反的輸出電平,反之com2與segl應(yīng)有相同的輸出電平。合成的波形如圖3的第三行。LCD顯示的閥值應(yīng)設(shè)置略微大于Vdd/2,用于減少或消除可能出現(xiàn)的鬼影。com口l/2電平由主控芯片將I/O口設(shè)置成輸入口,由外接上拉和下拉電阻分壓而產(chǎn)生。
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主營:世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國AB)系列產(chǎn)品》
②Schneider(施耐德電氣)系列產(chǎn)品》
③General electric(通用電氣)系列產(chǎn)品》
④Westinghouse(美國西屋)系列產(chǎn)品》
⑤SIEMENS(西門子系列產(chǎn)品)》
⑥銷售ABB Robots.FANUC Robots、YASKAWA Robots、KUKA Robots、Mitsubishi Robots、OTC Robots、PanasonicRobots、MOTOMAN Robots。
⑦estinghouse(西屋):OVATION系統(tǒng)、WDPF系統(tǒng)、MAX1000系統(tǒng)備件。
⑧Invensys Foxboro(??怂共_):I/A Series系統(tǒng),F(xiàn)BM(現(xiàn)場輸入/輸出模塊)
順序控制、梯形邏輯控制、事故追憶處理、數(shù)模轉(zhuǎn)換、輸入/輸出信號(hào)處理、數(shù)
據(jù)通信及處理等。Invensys Triconex:冗余容錯(cuò)控制系統(tǒng)、基于三重模件冗余(TMR)
結(jié)構(gòu)的zui現(xiàn)代化的容錯(cuò)控制器。
⑨Siemens(西門子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂):Indramat,I/O模塊,PLC控制器,驅(qū)動(dòng)模塊等。
◆Motorola(摩托羅拉):MVME 162、MVME 167、MVME1772、MVME177等系列。
ALLEN BRADLEY 1336F-BRF200-AE?-EN-HAS2-L5 15 HP AC DRIVE
ALLEN BRADLEY 1336F-BRF20-AA-?EN USPP 1336FBRF20AAEN
Allen Bradley AB VS 1336F-BRF15-AA-?EN-HAS2-L9E 1.5 HP
Allen Bradley 1336 Plus II 1336F-BRF200-AA?EN New no box
ALLEN BRADLEY 1336F-BRF20-AA-?EN-HAS1 USPP 1336FBRF20AAE
Allen Bradley 1336F-BRF200-AA?-EN 20 HP AC VS VF Drive
ALLEN BRADLEY 1336F-BRF20-AE-?EN USPP 1336FBRF20AEEN
ALLEN-BRADLEY 1336F BOARD 74101-212-51 MS110314 USED.
ALLEN BRADLEY 1336F-BRF30-AE-?EN USPP 1336FBRF30AEEN
Allen Bradley AB 1336F-BRF100 VS Drive MCC Bucket 30A
Allen Bradley AB 1336F-BRF200 VS Drive MCC Bucket 60A
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HCS2-L6E USPP 1336FBRF5
Allen Bradley AB 1336F-BRF200 VS Drive MCC Bucket 50A
ALLEN BRADLEY 1336F-BRF50-AA-?EN-LA2-LA3 USPP 1336FBRF50
ALLEN BRADLEY 1336F-BRF150-AE?-EN DRIVE 15HP 460V*XLNT*
ALLEN BRADLEY 1336F BRF20
Allen Bradley 1336F-BRF50-AA-?EN-HCS1-L5#10847
NEW ALLEN BRADLEY 1336F-BRF150-AN?-EN-L6 DRIVE 15HP
ALLEN BRADLEY 1336F-BRF75-AN-?EN-HCS1-L6 USPP 1336FBRF75
1336F-BRF100-AA?-EN Allen Bradley 1336FBRF100AAEN
Allen Bradley 1336F-BRF200-AA?-EN-HCS2 20HP AC Drive
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HAS2-L5 NSFP 1336FBRF50
ALLEN BRADLEY 1336F-BRF150-AA?-EN NEW 1336FBRF150AAEN
ALLEN BRADLEY 1336F-BRF50-AA-?EN USPP 1336FBRF50AAEN
ALLEN BRADLEY 1336F-BRF150-AN?-EN NEW 1336FBRF150ANEN
ALLEN BRADLEY 1336F-BRF20-AA-?EN-HAS2-L6 NSFP 1336FBRF20
ALLEN BRADLEY 1336F-BRF200-AN?-EN NEW 1336FBRF200ANEN
ALLEN BRADLEY 1336F-BRF20-AN-?EN-GMS1 DRIVE 480VAC 2HP
ALLEN BRADLEY 1336F-CWF10-AA-?EN NSPP 1336FCWF10AAEN
ALLEN BRADLEY 1336F-BRF30-AN-?EN-GMS1 DRIVE 480VAC 3HP
ALLEN BRADLEY 1336F-BRF10-AA-?EN5 USPP 1336FBRF10AAEN5
Allen Bradley 1336F-BRF50-AA-?EN-HAS2-L6 5HP
Allen Bradley AB 1336F-BX040-AE-?EN-L6 40 HP VS Drive
ALLEN BRADLEY 1336F-BRF30-AA-?EN-HAS2 USPP 1336FBRF30AAE
Allen Bradley 1336F-BRF100-AE?-EN Series A
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HA2-L6 USPP 1336FBRF50A
ALLEN BRADLEY 1336F B020 AX EN L6 20 HP VFD REFURBISHED
ALLEN BRADLEY 1336F-BRF50-AA-?EN-HCS2-LA2-LA3?-L4 USPP 13
Allen Bradley 1336F Plus II,460 volt,5HP,NIB
Allen Bradley 1336 Plus II 1336F-C040-AN-E?N!BRAND NEW
ALLEN BRADLEY 1336F-CWF150-AN?-EN-HAS2
Allen Bradley 1336F-BRF20-AA-?EN-HC-S2-L6 AC Drive
ALLEN BRADLEY 1336F-MCB-SP1D USPP 1336FMCBSP1D
Allen Bradley 1336F-CWF50-AN-?EN 5HP Drive 575V
ALLEN BRADLEY 1336F-BRF100-AE?-EN-L5 AC DRIVE 10HP
ALLEN BRADLEY 1336F-BRF20-AA-?EN-L5 USPP 1336FBRF20AAENL
ALLEN BRADLEY 1336F-BRF200-AA?-EN-HASP-L6 USPP 1336FBRF2
ALLEN BRADLEY 1336F-AA3 NSFP 1336FAA3
ALLEN BRADLEY 1336F-BRF10-AA-?EN 10 HP DRIVE
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ALLEN BRADLEY 1336F-LA2
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ALLEN BRADLEY 1336F-BRF75-AA-?EN-HAS2-L6 USPP 1336FBRF75
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Allen Bradley Drive Cat 1336F-BRF150-AN?-EN-GMS6-L6 Used
ALLEN BRADLEY 1336F-BRF75-AA-?EN USPP 1336FBRF75AAEN
Allen Bradley 1336F-BRF50-AA-?EN-HAS2-LA2-L6 Drive
Allen Bradley 50 HP Drive Cat#1336F-B050-AN-E?N
Allen Bradley AC Drive Cat#1336F-BRF100-AA?-EN
Allen Bradley 125 HP Drive Cat#1336F-B125-AA-E?N-Q Used
ALLEN BRADLEY 1336F-BRF150-AA?-EN USPP 1336FBRF150AAEN
ALLEN BRADLEY 1336F-B125-AE-E?N USPP 1336FB125AEEN
NEW ALLEN BRADLEY 1336F-BX040-AN-?EN-HCS2-L6 40HP DRIVE
Allen Bradley 1336F 1336F-B020-AX-E?N-L AC Drive 25HP
ALLEN BRADLEY 1336F-BX060-AN-?EN NSFP 1336FBX060ANEN
5668 Allen-Bradley 1336F-BRF100-AA?-EN Motor Controller
ALLEN BRADLEY 1336F-BRF50-AN-?EN-GMS5 AC DRIVE 5HP
ALLEN BRADLEY 1336F-MCB-SP1A CONTROL BOARD*XLNT*
NIB ALLEN-BRADLEY 1336F-B060-AA-E?N-HAS1 AC DRIVE 60HP
Allen Bradley AB 1336F-B050-AA-E?N 50 HP VF VS Drive REM
Allen Bradley AC Drive Cat#1336F-BRF50-AA-?EN Used
Allen Bradley 1336F-BRF50-AA-?EN AC Motor Drive NEW NNB
100 HP 460 Volt Allen Bradley 1336F Drive
1336F-B100C-AA?-CB-CF-D52-HA2?C-LA2C LA3C-L5C-CUSTO?M
Allen Bradley 1336F-BRF50-AA-?EN|AC Drive 5Hp*NIB*
Allen Bradley AB 1336F-B050-AA-E?N 50 HP VF VS Drive NIB
ALLEN BRADLEY 1336F-BRF100-AA?-EN-HASP-L6 USPP 1336FBRF1
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ALLEN BRADLEY 1336F-BX150-AA-?EN-HAS2-L4 150 HP AC DRIVE
ALLEN BRADLEY 1336F-BRF75-AAE?N-HCS1-L6 USPP 1336FBRF75A
ALLEN BRADLEY 1336F-BRF150-AN?-EN 1336FBRF150ANEN
Allen-Bradley 1336F-BRF100-AA?-EN AC Drive(1583)
NEW Allen Bradley 1336F-BRF50-AA-?EN Impact AC Drive
1336F-BRF50-AN?-EN-HCS2-L8E
ALLEN BRADLEY 1336F-BRF05-AN-?EN.5 HP AC DRIVE 460V
Allen-Bradley 1336F PLUS II AC Drive(15 HP)