ABB UT372B GKWN0007R1
数字万用表的交流电压挡很灵敏,哪怕周围有很小的感应电压都可以有显示。根据这一特点,可以当作测试电笔用。用法如下:将万用表打到AC20V挡,黑表笔悬空,手持红表笔与所侧路线或器件相接触,这时万用表会有显示,如果显示数字在几伏到十几伏之间(不同的万用表会有不同的显示),表明该线路或器件带电,如果显示为零或很小,表明该线路或器件不带电。
2.区分供电线是火线还是零线
第一种方法:可以用上面的方法加以判断:显示数字较大的就是火线,显示数字较小的就是零线。这种方法需要与所测量的线路或器件接触。
第二种方法:不需要与所测量的线路或器件接触。将万用表打到AC2V挡,黑表笔悬空,手持红表笔使笔尖沿线路轻轻滑动,这时表上如果显示为几伏,表明该线是火线.如果显示只有零点几伏甚至更小.则说明该线是零线。这样的判断方法不与线路直接接触.不仅安全而且方便快捷。
3.寻找电缆的断点
当电缆线中出现断点时,传统的方法是用万用表电阻挡一段一段地寻找电缆的断点,这样做不仅浪费时间,而且会在很大程度上损坏电缆的绝缘。利用数字万用表的感应特性可以很快地寻找到电缆的断开点。先用电阻挡判断出是哪一根电缆芯线发生断路.然后将发生断路的芯线的一头接到AC220V的电源上,随后将万用表打到AC2V挡的位置上,黑表笔悬空,手持红表笔使笔尖沿线路轻轻滑动,这时表上若显示有几伏或零点几伏(因电缆的不同而不同)的电压,如果移动到某一位置时表上的显示突然降低很多,记下这一位置:一般情况下。断点就在这一位置的前方10~20cm之间的地方。
用这种方法还可以寻找故障电热毯等电阻丝的断路点。
4.测量ups电源的频率
对于UPS电源来说.其输出端的电压的稳定性是重要参数,其输出的频率也很重要。但是不能直接用数字万用表的频率挡去测量,因为其频率挡能承受的电压很低.只有几伏。这时可以在UPS电源的输出端接一220V/6V或220V/4V降压变压器,将电压降低,而不改变电源的频率,然后将频率挡与变压器的输出相接,就可以测量出UPS电源的频率。
万用表使用注意事项
(1)在使用万用表之前,应先进行“机械调零”,即在没有被测电量时,使万用表指针指在零电压或零电流的位置上。
(2)在使用万用表过程中,不能用手去接触表笔的金属部分,这样一方面可以保证测量的准确,另一方面也可以保证人身安全。
(3)在测量某一电量时,不能在测量的同时换档,尤其是在测量高电压或大电流时,更应注意。否则,会使万用表毁坏。如需换挡,应先断开表笔,换挡后再去测量。
(4)万用表在使用时,必须水平放置,以免造成误差。同时,还要注意到避免外界磁场对万用表的影响。
(5)万用表使用完毕,应将转换开关置于交流电压的最大挡。如果长期不使用,还应将万用表内部的电池取出来,以免电池腐蚀表内其它器件。
TURCK Bi15-CP40-VN4X2 *USED*
HEIDENHAIN LS 106 / 336 958-40 *NEW OUT OF BOX*
GENERAL ELECTRIC 22D155G2 110V COIL *USED*
LOT OF 4 BUSS FUSE HOLDER JT60030 600VAC *USED*
FACTS ENGINEERING FA-REC3 *NEW OUT OF A BOX*
ORMEC QTG910 PC BOARD *USED*
LUTZE DG 3-10-0,5M *USED*
GOULD 69171 *USED*
ITT 6000-04 *USED*
LOT OF 2 HOLJERON ZONELINK CONTROLLER ZL-C401-D *USED*
ANTUNES CONTROLS 8221210034 *USED*
LOT OF 2 DECCO 9-86-056 COIL *USED*
PCB LOAD CELL 203M22 *NEW*
MURR ELEKTRONIK 51120 *USED*
LOGICAL DEVICES INC. SHOOTER EE/EPROM PROGRAMMER RS232 ...
LOT OF 4 MAC VALVE 180027 *NEW*
EDWARDS 5530BHV-Y6 *NEW IN A BOX*
ATLAS COPCO POWER FOCUS 2101-S7-115R *NICE*
PHOTOSWITCH 47CN4 MODEL 1005 PHOTO ELECTRIC SENSOR *USE...
EDWARDS 5530BHV-Y6 *NEW OUT OF BOX*
FISHER 2U219533272 *NEW IN A BOX*
PYRONICS PS-0 *NEW IN A BOX*
MAC VALVE INC. 45A-AA1-DDAJ-1K?D SOLENOID VALVE *NEW IN ...
CUTLER-HAMMER CIRCUIT BREAKER HMCP003A0C *USED*
PLC DIRECT D2-16ND3-2 INPUT MODULE *USED*
BARKSDALE PRESSURE SWITCH D1T-A3SS *USED*
DURANT 6-Y-41346-402-M?EU *NEW OUT OF A BOX*
TURCK Bi15-CP40-VN4X2 *USED*
HEIDENHAIN LS 106 / 336 958-40 *NEW OUT OF BOX*
GENERAL ELECTRIC 22D155G2 110V COIL *USED*
LOT OF 4 BUSS FUSE HOLDER JT60030 600VAC *USED*
ALLEN BRADLEY 194R-NJ303P3 SER.B *USED*
LOT OF 6 ELECTROMATIC S408 10A/380V *USED*
TURCK BI5-G18-AZ3X-B3?331 *USED*
BOSTON GEAR RATIOTROL AC INVERTER ACE-T-230V-3P--?1HP
MANNESMANN REXROTH VT5008-17B *USED*
FUJI ELECTRIC CIRCUIT BREAKER BU-ESB3060 *NEW*
HONEYWELL 926AB4XM-A9T-L *USED*
FISHER 1U230224492 *NEW IN BOX*
FIREYE TYPE.45UV5 MOD.1005 *USED*
ZZ-ANTRIEBE K080-0649-002 GEAR REDUCER *USED*
KRAUS & NAIMER CG4 *USED*
CRANE RM327777NN-0240 RESISTOFLEX *USED*
TAISEI KOGYO CO. LTD. ISF-04 SUCTION FILTER *USED*
BATTFELD GLOUCESTER ENGINEERING D40074099 REV.C POTENTI...
RELIANCE ELECTRIC 0-57170 PRINTER CIRCUIT DRIVE CARD *U...
MILAND ROSS 626-0194 *USED *
ACME/STANDARD POWER SPWS-59-OV POWER SUPPLY *NICE*
TOLEDO SCALE 1996 *USED*
YARWAY 711 721 *USED*
LENZE 961-334 BAS DRIVER BD *USED*
ALLEN BRADLEY 1305-BA03A SERIES A *USED*
MILLTRONICS MFA-4-1221 MOTION FAILURE ALARM *USED*
FANUC A06B-0512-B001 *USED*
ACROMAG 712-DA BOARD *USED*
TEMPOSONICS 011048070321050?0 48" STROKE ANALOG OUTPUT M...
TRIG-TEK 619B+1 *NICE*
BENTLY NEVADA 90050-01-00-00-?00-00-00-00 *USED*
GENERAL ELECTRIC CR104PXG22 TRANSFORMER UNIT *USED*
TRIG-TEK 619-2 *NICE*
MITSUBISHI FX-20P-CADP *USED*
BAUMER ELECTRIC IWRM 30U9501 *USED GOOD CONDITION*
WHITNEY CO. 151SR PNEUMATIC ACTUATOR *USED *
FOSTEC 20500.2 *USED* (NO POWER CORD)
HARRIS INSTRUMENT CORPORATION 10XRA SCAN A LINE *USED*
ITW RANSBURG 78084-50 CABLE 9040 LOW VOLTAGE *NEW*
TACO MK-3141-0-2 PNEUMATIC DAMPER ACTUATOR 3-1/2" *NEW ...
LOT OF 5 ALLEN BRADLEY 0L11 440V COIL *USED*
SQUARE D S2936-S1-C33A 480V COIL *USED*
ALLEN BRADLEY 42EF-P2RCB-G4 SER.A *USED*
CUTLER HAMMER E50DS3 SER.A1 OPERATING HEAD *USED*
LOT OF 4 NUMATICS 139-145P 115-120/60 COIL *USED*
LOT OF 3 GENERAL ELECTRIC SNAP SWITCH CR115B4 *USED*
PHOENIX CONTACT UM45-D35SUB/B BREAK OUT MODULE *USED*
GE 9T58B45 TYPE IP INDUSTRIAL CONTROL TRANSFORMER *USED...
LOT OF 2 MAC 45A-L00-DDAJ-2T?E9 *USED*
ALLEN BRADLEY 872C-D4NP12-D4 SER.D PROXIMITY SENSOR *U...
CERUS INDUSTRIAL CRD-9 *USED*
ATLAS COPCO CABLE 4220-1616-10 *NEW*
JEFFERSON ELECTRIC 637-0461-000 TRANSFORMER *NICE*
VSE V5004GP012-V- *NEW OUT OF A BOX*
ASAHI/AMERICA DUO-BLOC 21 PVDF 1/2" BALL VALVE *NEW I...
DAYTON TIME SWITCH 6X759 *NEW OUT OF BOX*
EFECTOR II5829 *NEW IN BOX*
CUTLER-HAMMER 1510-3 440V COIL *USED*
BIMBA 313-DXP PNEUMATIC CYLINDER (AS PICTURED) *USED*
INDUSRTIAL TIMER CORPORATION MODEL GP-6SSEC TIMER *USED...
ORIENTAL MOTOR REVERSIBLE MOTOR 2RK6GK-AA *USED*
LOVATO BF9.10-120AC CONTACTOR *USED*
SHINDENGEN ELECTRIC GY242R1GN *USED*
PARKER GP10A *USED*
AIOI SEIKI INC. VRP210M VALVE *USED*
STI SAFTEY RELAY SR103AM02 *USED*
SQUARE D 2N-301 CURRENT TRANSFORMER *USED*
ITW RANSBURG 78084-50 CABLE 9040 LOW VOLTAGE *NEW*
TACO MK-3141-0-2 PNEUMATIC DAMPER ACTUATOR 3-1/2" *NEW ...
LOT OF 5 ALLEN BRADLEY 0L11 440V COIL *USED*
SQUARE D S2936-S1-C33A 480V COIL *USED*
ALLEN BRADLEY 42EF-P2RCB-G4 SER.A *USED*
CUTLER HAMMER E50DS3 SER.A1 OPERATING HEAD *USED*
LOT OF 4 NUMATICS 139-145P 115-120/60 COIL *USED*
LOT OF 3 GENERAL ELECTRIC SNAP SWITCH CR115B4 *USED*
PHOENIX CONTACT UM45-D35SUB/B BREAK OUT MODULE *USED*
GE 9T58B45 TYPE IP INDUSTRIAL CONTROL TRANSFORMER *USED...
LOT OF 2 MAC 45A-L00-DDAJ-2T?E9 *USED*
ALLEN BRADLEY 872C-D4NP12-D4 SER.D PROXIMITY SENSOR *U...
CERUS INDUSTRIAL CRD-9 *USED*
ATLAS COPCO CABLE 4220-1616-10 *NEW*
JEFFERSON ELECTRIC 637-0461-000 TRANSFORMER *NICE*
VSE V5004GP012-V- *NEW OUT OF A BOX*
ASAHI/AMERICA DUO-BLOC 21 PVDF 1/2" BALL VALVE *NEW I...