Biddle BMM500_EN_UG 电路图.pdf

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1、M Megger Limited Archliffe Road, Dover Kent CT17 9EN England T +44 (0) 1304 502 101 F +44 (0) 1304 207 342 Megger PO BOX 9007, Valley Forge PA 19484-9007 USA T +1 (610) 676 8500 F +1 (610) 676 8610 Megger 4271 Bronze Way, Dallas, Texas 75237-1017 USA T +1 (800) 723 2861 T +1 (214) 330 3203 F +1 (214

2、) 337 3038 Megger SARL 29 Alle de Villemomble 93340 Le Raincy, France T +33 (1) 43.02.37.54 F +33 (1) 43.02.16.24 OTHER TECHNICAL SALES OFFICES Toronto CANADA, Mumbai India and BAHRAIN. Megger products are distributed in 146 countries worldwide. This instrument is manufactured in the United Kingdom.

3、 The company reserves the right to change the specifi cation or design without prior notice. Megger is a re g i s t e red trademark Part No. 6172-697 V02 Printed in England 11HH RadioFans.CN 收音机爱 好者资料库 USER GUIDE GUIDE DUTILISATEUR BENUTZERANLEITUNG GUA DEL USUARIO M BMM500 Series Insulation & conti

4、nuity testers t prior notice. RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 Contents Safety Warnings2 Description3 Operation4 Live Circuit warning4 Voltage testing4 Auto-shut off4 Backlight4 Insulation tests5 Locking Test Button (ltb)5 Polarisation Index Te s t i n g5 Automatic Discharge6 Zeroing

5、of Test Lead Resistance7 Possible sources of error7 Continuity Bleeper8 Resistance Tests (k)8 Diode T e s t i n g8 Voltage Tests (V)9 Battery Replacement10 Fuse Checking and Replacement10 Using the MEGGER SP1 Switched Probe11 Specifi cation12 Repair and Warranty19 1 Symbols used on the instruments a

6、re : Caution, risk of electric shock. Caution, refer to User Guide. Equipment protected throughout by Double Insulation (Class II). Equipment complies with current EU Directives. Equipment must not be connected to voltage sources 600V CAT II. Suitable for electrical installations CAT III 300V to Ear

7、th 600V 2 SAFETY WARNINGS Safety Warnings and Precautions must be read and understood before the instrument is used. They must be observed during use. The circuit under test must be de-energised and isolated before connections are made except for voltage measurement. Circuit connections m u s t not

8、be touched during a test. After insulation tests, capacitive circuits must be allowed to discharge before disconnecting the test leads. The Live Circuit Warning and Automatic Discharge are additional safety features and should not b e regarded as a substitute for normal safe working practice. Replac

9、ement fuses m u s t be of the correct type and rating. Failure to fi t the correctly rated fuse will result in damage to the instrument in the event of an overload. Test leads, including crocodile clips, must be in good order, clean and have no broken or cracked i n s u l a t i o n . Ensure that han

10、ds remain behind guards of probes/clips when testing. U.K. Safety Authorities recommend the use of fused test leads when measuring voltage on high energy s y s t e m s . NOTE THE INSTRUMENTS MUSTONLY BE USED BYSUITABLY TRAINED AND COMPETENTPERSONS Users of this equipment and/or their employers are r

11、eminded that Health and Safety Legislation require them to carry out valid risk assessments of all electrical work so as to identify potential sources of electrical danger and risk of electrical injury such as from inadvertent short circuits. Where the assessments show that the risk is signifi cant

12、then the use of fused test leads constructed in accordance with the HSE guidance note GS38 Electrical Test Equipment for use by Electricians should be used. Description Congratulations on your purchase of a genuine Megger insulation/continuity tester. Megger has over 100 years experience in insulati

13、on testing which is refl ected in its product designs. Your BMM500 has been carefully developed to address the real needs and benefi ts of the user. The Megger BMM500 Series instruments are battery powered Insulation and Continuity testers, with a measurement capability from 0,01 Continuity to 10G I

14、nsulation. O ffering multi-voltage facilities, the instruments take full advantage of microprocessor t e c h n o l o g y and feature a large liquid crystal display combining digital and analogue readings. T h e analogue display has the benefi t of indicating trends and fl uctuations in readings, whi

15、le the digital readout gives direct accurate results. T h e display is also backlit giving clear visibility even in low light conditions. The BMM500 Series instruments have the unique capability of being able to measure voltages down to a resolution of 0,1mV. This gives the user the option to fi t a

16、 wide variety of transducers to further enhance the capabilities of the BMM Series instruments, eg temperature or humidity measurement. A customised connector on the top of the instrument enables the optional Megger SP1 Switched Probe to be used for two handed probe operation. The 250V, 500V and 100

17、0V ranges can be used to test electrical installations in compliance with BS7671 (16th Edition IEE Wi r i n g Regulations) IEC364 and HD384, since each range has a 1mA minimum test current at the minimum pass values of insulation specifi ed in these documents. Designed to IEC1010-1 the BMM500 Series

18、 are protected against connection to a 300V Category III supply. T h e instruments have a basic accuracy of 2% at 20C. The instruments are waterproof and dustproof to IP54. This helps maintain accuracy and ensures maximum reliability in harsh e n v i r o n m e n t s . 3 Operation Refer to Safety Wa

19、rnings before using the instrument Testing is automatically inhibited if: An external voltage 55V is present when switched to any insulation range position An external voltage 10V is present on all other ranges (excluding OFF/V). The external voltage is indicated on the display, on insulation ranges

20、 an audible bleeper will sound if a test is attempted. Live Circuit Wa rn i n g When more than 25V is applied to the terminals in the insulation ranges, the instrument defaults to a voltmeter and gives an audible warning. On all other switch positions except OFF/V when approx 10V is applied the defa

21、ult voltmeter will be activated. Testing will be inhibited. Voltage Testing on High Energy Systems Use extreme care when using or measuring voltages above 30V, particularly in high energy systems. Fused test leads are available as optional accessories for local situations where increased protection

22、is required. Auto-shut Off To conserve battery life, Auto-shut Off (preceded by a series of bleeps) operates after approx. 10 minutes of instrument inactivity on insulation, 5 minutes on all other ranges. If the instrument is switched on whilst holding the key, the Auto shut-off time is extended to

23、60 minutes. To restore operation after Auto- shut Off, select OFF followed by the required switch position. Note: It is recommended that the instrument is switched to the OFF position when not in use. B a c k l i g h t The backlight is activated by pressing the key. The backlight will remain illumin

24、ated for approx. one minute before automatically switching off to conserve battery life, 4 Operation alternatively thekey can be re-pressed. Insulation Tests (M) (See fi g. 1) The insulation tests apply a known voltage to the circuit under test and measure the resulting leakage current. The circuit

25、under test must be completely de-energised and isolated before test connections are made. Insulation tests are only initiated when the TEST button is pressed. 1. Set the range switch to the test voltage required. 2. Connect the test leads, fi rst to the instrument, and then to the isolated item unde

26、r test. 3. Press the TEST button to activate the test voltage. Take the reading. 4.Release the TEST button at the end of the test. 5. Any capacitive circuits charged during a test will automatically discharge. If signifi c a n t voltage remains the voltage warning will occur and the voltage present

27、displayed. 6. Remove the test leads only when no voltage is indicated. Locking Test Button (ltb) When it is desired to do a long insulation test, the test can be locked on by pressing the key while the test button is held down. The warningwill appear on the display and both buttons may be released w

28、hilst the test continues. The next press of the test button will terminate the test. N o t e : T h e re is a short delay on the fi rst operation of 1000V range, each time the range is selected. This is to prevent accidental application of 1kV. Polarisation Index Te s t i n g Polarisation Index (PI)

29、is the term applied to the Dielectric Absorption Ratio when resistance values are measured after 1 minute and again after 10 minutes. Polarization Index is then the resistance value after 10 minutes divided by the resistance value after 1 minute. The test can be run at any voltage. More detailed inf

30、ormation 5 Operation on PI Testing and value assessment can be found in Megger Limited publications listed in the Accessories page. Automatic Discharge When the TEST button is released after an insulation test (or re-pressed if ltb feature is enabled), a 200k load is automatically switched across th

31、e terminals to discharge the item under test. Any voltage present will be indicated on the display so that the discharge can be monitored. Typical Terminal Voltage Characteristics Continuity Testing () (See fi g.2) The continuity tests are activated when the probes make contact of less than a few k.

32、 The tests apply a constant current and measure the resulting volt drop across the circuit under test. The test operates without the need to press the TEST button. When the test leads are removed 6 Fig.1 Operation the reading will hold for a few seconds and then reset. This range is not suitable for

33、 diode testing since the automatic contact detector will not be activated when connected to a diode. 1. Set the selector switch to . 2. Connect the test leads. 3. The test will activate automatically. 4. After the test probes are disconnected, the reading will be held for a few seconds. Z e roing of

34、 Test Lead Resistance The resistance of the test leads can be nulled on the continuity range (up to 9,99). The null information is retained in non-volatile memory and so will be remembered when the instrument is switched off. 1. Select the Continuity range. 2. Short the test leads across a known goo

35、d conductor using prods. 3. When the reading has stabilised, press the TEST button. The zero offset symbol will appear. 4. To release the zero offset press the TEST button again. Possible sources of erro r Measurements and results can be effected by the following: The impedance of operating circuits

36、 connected in parallel Impedance such as inductors that vary during the measurement Apoor connection to the circuit under test. 7 Fig.2 Continuity Bleeper The continuity bleeper sounds continuously when a resistance below the threshold level is detected. This can be selected from several values betw

37、een 2 and 3k. To change the level press the button. Short bleeps will sound for values above the threshold but below approx. 3k 1. Set the selector switch to 2. Connect the test leads. Display (5 level selected):Audible: 5continuous bleep 3kno bleep To turn off the audible tone and replace it with a

38、 visual indication of continuity, press the TEST button whilst switched to the range. will be displayed momentarily and will appear when resistances below the threshold are measured. Resistance Tests (k) This is a low voltage (5V) low current (25A) test for sensitive electronic equipment. It operate

39、s in the same way as the continuity ranges. 1. Set the selector switch to k. 2. Connect the test leads. 3. The test will activate automatically. The resistance range is protected by a high impedance method and therefore if the instrument is connected to a live circuit the fuse will not blow as on th

40、e insulation, continuity and buzzer ranges. The instrument will merely indicate the applied over-voltage. Diode Te s t i n g This range can also be used for diode testing, the positive terminal being the source of the test current. A forward biased semi-conductor junction will typically measure 15 t

41、o 30k and the diode symbol is shown on the display. A reverse junction will measure much higher. These features together with the small test Operation 8 current and wide measurement range(0,01k to 10000k) make the resistance range very useful for general purpose testing. Voltage Tests (V) If 1V a.c.

42、 or d.c. is present at the terminals the measured voltage is indicated on the display. The voltage display will function within specifi cation even if the fuse has blown. If the voltmeter operation is in question, test the voltmeter on a known source. 1. Set the selector switch to V. 2. Connect the

43、test leads. 3. After a short settling time, the reading will be displayed automatically. To view the frequency of the a.c. V being measured, press the key. The frequency will be displayed in the range 16Hz - 460Hz. To view a.c. V press the key. Millivolt Tests (mV) The measured a.c. or d.c. voltage

44、is indicated on the display. 1. Set the selector switch to mV. 2. Select either ac or dc mV using the key. 3. Connect the test leads. 4. After a short settle time, the reading will be displayed automatically. Measuring Other Parameters The BMM500 Series can be used to measure numerous quantities fro

45、m temperature to current to windspeed through the use of mV output probes. Any compatible probe with a known output ratio can be used. eg: a temperature probe with output ratio of 1mV/C will cause the display to indicate directly in C Certain probes require zeroing, eg windspeed anemometer. The mV z

46、ero option described below provides this facility Z e roing of d.c. mV (no a.c. mV zero facility) To zero the d.c. mV range, short the leads together in the d.c. mV position, wait for the reading to settle and then press the TEST Operation 9 Operation button. Up to 9,9mV can be zeroed on the d.c. mV

47、 range. The symbolwill appear to indicate the zero has been adjusted. 1. Select the d.c. mV range. 2. Short the test leads together. 3. When the reading has stabilised, press the TEST button. The zero offset symbol will appear. 4. To release the zero offset press the TEST button again. Battery Repla

48、cement When the low battery symbolappears, the cells are nearly exhausted and should be replaced as soon as possible. Use Alkaline c e l l s IEC LR6 (AA) or NiCd/NiMH rechargeable. To install or replace the cells, disconnect the test leads, switch the instrument to OFF and loosen the captive screws

49、on the rear of the battery compartment. Remove the cover and disconnect the battery holder from the battery leads. Ensure that the replacement cells are fi tted with the correct polarity in accordance with the label in the battery holder. Reconnect the battery holder to the battery leads. Replace and re-secure the battery compartment cover. Remove the cells if the instrument is not going to be used for an extended period of time. The BMM500 Series incorporates an electronic contact detector to minimise the chance of blowing the