描述
測(cè)量前要先檢查數(shù)字兆歐表是否完好,即在數(shù)字兆歐表未接上被測(cè)物之前,打開(kāi)電源開(kāi)關(guān),檢測(cè)數(shù)字兆歐表電池情況,如果數(shù)字兆歐表電池欠壓應(yīng)及時(shí)更換電池,否則測(cè)量數(shù)據(jù)不可取。將測(cè)試線插入接線柱“線(L)和地(E)”,選擇測(cè)試電壓,斷開(kāi)測(cè)試線,按下測(cè)試按鍵,觀察顯示是否數(shù)字是否顯示無(wú)窮大。將接線柱“線(L)和地(E)”短接,按下測(cè)試按鍵,觀察是否顯示“0”。如液晶屏不顯示“0”,表明數(shù)字兆歐表有故障,應(yīng)檢修后再用。必須正確接線。數(shù)字兆歐表上一般有三個(gè)接線柱,分別標(biāo)有L(線路)、E(接地)和G(屏蔽)。其中L接在被測(cè)物和大地絕緣的導(dǎo)體部分,E接被測(cè)物的外殼或大地,G接在被測(cè)物的屏蔽上或不需要測(cè)量的部分。接線柱G是用來(lái)屏蔽表面電流的。如測(cè)量電纜的絕緣電阻時(shí),由于絕緣材料表面存在漏電電流,將使測(cè)量結(jié)果不準(zhǔn),尤其是在濕度很大的場(chǎng)合及電纜絕緣表面又不干凈的情況下,會(huì)使測(cè)量誤差很大。為避免表面電流的影響,在被測(cè)物的表面加一個(gè)金屬屏蔽環(huán),與數(shù)字兆歐表的“屏蔽”接線柱相連。這樣,表面漏電流IB從發(fā)電機(jī)正極出發(fā),經(jīng)接線柱G流回發(fā)電機(jī)負(fù)極而構(gòu)成回路。IB不再經(jīng)過(guò)兆歐表的測(cè)量機(jī)構(gòu),因此從根本上消除了表面漏電流的影響。接線柱與被測(cè)設(shè)備間連接的導(dǎo)線不能用雙股絕緣線或絞線,應(yīng)該用單股線分開(kāi)單獨(dú)連接,避免因絞線絕緣不良而引起誤差。為獲得正確的測(cè)量結(jié)果,被測(cè)設(shè)備的表面應(yīng)用干凈的布或棉紗擦試干凈。
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主營(yíng):世界知名品牌的PLC、DCS系統(tǒng)備件模塊
①Allen-Bradley(美國(guó)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(guó)西屋)系列產(chǎn)品》
⑤SIEMENS(西門(mén)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(chǎng)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(mén)子):Siemens MOORE,Siemens Simatic C1,Siemens數(shù)控系統(tǒng)等。
⑩Bosch Rexroth(博世力士樂(lè)):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。
REXROTH INDRAMAT SIOB-01 COMMUNICATIONS PROCESSOR
REXROTH INDRAMAT SIOB0100 COMMUNICATIONS PROCESSOR
REXROTH INDRAMAT SOT02-ER-FW STATION OPERATOR CONTROL PANEL
REXROTH INDRAMAT SOTO2-E2R-FW OPERATOR TERMINAL
REXROTH INDRAMAT SSE PROGRAMMER
REXROTH INDRAMAT TAM PROGRAMMING PANEL FOR TRANS01 KEYPAD REMOTE MOUNT
REXROTH INDRAMAT TBM1.1-020-W1 BLEEDER MODULE
REXROTH INDRAMAT TBM1.1-20-W1/115 BLEEDER MODULE
REXROTH INDRAMAT TBM1.1-20-W1/220V SERVO BLEEDER AC
REXROTH INDRAMAT TBM1.20-040-W1/220 SERVO BLEEDER W/220VAC INTERNAL FAN
REXROTH INDRAMAT TBM1.2-040-W1-024 BLEEDER MODULE
REXROTH INDRAMAT TBM1.20-W1-220 BLEEDER MODULE
REXROTH INDRAMAT TBM1.2-40-W1/115 BLEEDER MODULE
REXROTH INDRAMAT TBM1.2-40-W1-220 BLEEDER MODULE
REXROTH INDRAMAT TCM1.1-08-W0 SERVO MOTOR AC WO/BLOWER Z5 NON STANDARD
REXROTH INDRAMAT TDA1.3-100-3-L00 SERVO SPINDLE DRIVE
REXROTH INDRAMAT TDM1.2-030-300-W0 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-030-300-W1 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-030-300-W1-000 AC SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-030-300-W1.050 SERVO MODULE
REXROTH INDRAMAT TDM1.2-030-600-W1-000 AC SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-050-300-W1 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-050-300-W1-0 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-050-300-W1-000 SERVO DRIVE
REXROTH INDRAMAT TDM1.2-050-300-W1-115 SERVO DRIVE
REXROTH INDRAMAT TDM1.2-100-300-W1 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/0 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/000 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/115 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/2 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/220 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-100-300-W1/2 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM1.2-30-300-W0 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-30-300-W1 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.2-50-300-W1 SERVO DRIVE
REXROTH INDRAMAT TDM1.2-50-300W1-000 SERVO CONTROL MODULE
REXROTH INDRAMAT TDM1.2-50-300-W1/115 SERVO DRIVE
REXROTH INDRAMAT TDM1.2-50-WO-115V SERVO DRIVE
REXROTH INDRAMAT TDM13100300W1000 SERVO DRIVE
REXROTH INDRAMAT TDM14050300W1 MODULE
REXROTH INDRAMAT TDM1.4-050-300-W1-000 SERVO CONTROLLER
REXROTH INDRAMAT TDM1.4-050-300-W1-115 SERVO DRIVE
REXROTH INDRAMAT TDM14100300W10 SERVO DRIVE
REXROTH INDRAMAT TDM1.4-100-300-W1/00 SERVO AMPLIFIER
REXROTH INDRAMAT TDM1.4-100-300-W1-000 SERVO DRIVE
REXROTH INDRAMAT TDM1.4-100-300-W1-115 SERVO CONTROLLER
REXROTH INDRAMAT TDM2.1-30-300-W0 SERVO CONTROLLER
REXROTH INDRAMAT TDM2.1-50W-115V SERVO DRIVE
REXROTH INDRAMAT TDM2.4-050-220/300-W1/115/220 POWER SUPPLY MODULE FOR SERVO SYSTEM
REXROTH INDRAMAT TDM3-030-300-W1 SERVO CONTROLLER
REXROTH INDRAMAT TDM3.2-020-300-W0 SERVO DRIVE ADVANCED CONTROLLER
REXROTH INDRAMAT TDM32020300WO MOTOR CONTROL
REXROTH INDRAMAT TDM3.2-030-300-W0 SERVO DRIVE
REXROTH INDRAMAT TDM3.2-030-300-W1 SERVO DRIVE
REXROTH INDRAMAT TDM3.2-20-300-00 SERVO CONTROLLER
REXROTH INDRAMAT TDM3.2-20-300-W0 SERVO CONTROLLER
REXROTH INDRAMAT TDM3.2-20-W1 DRIVE
REXROTH INDRAMAT TDM4.1-020-300-W0 SERVO CONTROLLER AC
REXROTH INDRAMAT TDM/X8 CABLE MOTOR POWER
REXROTH INDRAMAT TFM3.1-050-300-W1 SERVO DRIVE
REXROTH INDRAMAT TH10492C IC
REXROTH INDRAMAT TP500MF2031011 CONTROL
REXROTH INDRAMAT TPT-1.0-3-A-1 TEACH PENDANT
REXROTH INDRAMAT TRANS-01 CONTROL PANEL














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