Megger BMM2500, User Manual

Page 1: ...ze Way Dallas Texas 75237 1019 USA T 1 800 723 2861 USA ONLY T 1 214 333 3201 F 1 214 331 7399 E ussales megger com Megger Z A Du Buisson de la Couldre 23 rue Eugène Henaff 78190 TRAPPES France T 33 0 1 30 16 08 90 F 33 0 1 34 61 23 77 E infos megger com Megger Pty Limited Unit 26 9 Hudson Avenue Castle Hill Sydney NSW 2125 Australia T 61 0 2 9659 2005 F 61 0 2 9659 2201 E ausales megger com Megge...

Page 2: ...User Guide M BMM2500 Insulation Multimeters ...

Page 3: ...lass II Equipment complies with current EU Directives Equipment must not be connected to installations 500V 500V Safety Warnings 3 General Description 4 Continuity Testing 8 Continuity Bleeper 10 Millivolt Tests 11 Capacitance Tests 12 Milliamps Tests 12 Storing Results 13 Datalogging 16 Setup Modes 18 Specification 20 Repair and Warranty 25 ...

Page 4: ...strument in the event of an overload Test leads including crocodile clips must be in good order clean and have no broken or cracked insulation Ensure that hands 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 systems NOTE THE INSTRUMENTS MUST ONLY BE USED BY SUITABLY TRAINED AND COMPETENT PERSONS U...

Page 5: ...f the BMM Series instruments eg temperature or humidity measurement A customised connector on the top of the instrument enables the optional Megger SP6F Switched probe to be used for two handed probe operation The 250V 500V and 1000V ranges can be used to test electrical installations in compliance with BS7671 16th Edition IEEE Wiring Regulations IEC364 and HD384 since each range has a 1mA minimum...

Page 6: ...t of an integrated test and certification system The BMM2500 series instruments also have the capability to data log results over an extended time period so that long term measurements of systems can be taken Designed to IEC1010 1 the BMM2500 Series are protected against connection to a 500V Category III supply The instruments have a basic accuracy of 2 at 20 C The instruments are waterproof and d...

Page 7: ... 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 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...

Page 8: ...uits charged during a test will automatically discharge If significant voltage remains the voltage warning will occur and the voltage present 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 warning will appear on the displa...

Page 9: ... 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 information on PI Testing and value assessment can be found in Megger Limited publications listed in the Acc...

Page 10: ...sconnected the reading will be held for a few seconds Zeroing of Test Lead Resistance The resistance of the test leads can be nulled on the continuity range up to 9 99Ω 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 good conductor using prods 3 When the reading...

Page 11: ...tinuity ranges 1 Set the selector switch to kΩ 2 Connect the test leads 3 The test will activate automatically The kΩ range features a range lock facility To LOCK the kΩ range press the key the LOCK symbol will appear To scroll through the available ranges press the key To de select the LOCK feature hold the key down The resistance range is protected by a high impedance method and therefore if the...

Page 12: ...c voltage is indicated on the display 1 Set the selector switch to mV 2 Select either a c or d c mV using the key 3 Connect the test leads 4 After a short settling time the reading will be displayed automatically Note Live circuit warning does not function on mV range Zeroing 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 rea...

Page 13: ...discrete components and short low interference level signal lines If electrolytic capacitors are being tested then the red lead should be connected to ve of the capacitor This range is not suitable for checking capacitance of signal lines which are subject to high levels of a c interference When the test is started will show on the display if there is excessive noise this symbol will remain or fla...

Page 14: ...mber 1 99 may be assigned and circuits may be grouped using the distribution board feature In this way when downloading to PowerSuite the results can be easily split into different test schedules When the results are displayed or printed a change in the distribution board is indicated Changing Distribution Boards DB Before a test the distribution board number may be changed as follows 1 Move the r...

Page 15: ...4 The circuit number is then displayed as 2 digits e g c01 Note Many different tests may be saved under the same circuit number 5 The circuit number may be changed by pressing the and keys to display an appropriate number 6 The number can be accepted and the results saved by pressing the key or the procedure aborted by pressing the EXIT button 7 When the result is saved the code Std is displayed a...

Page 16: ...rotary selector switch to the RCL position The code rcl is displayed 2 Select the required distribution board by pressing the and keys The distribution board numbers are shown in the order that the results were stored A long bleep is sounded when the end of the list is reached 3 Press the key to list the circuit numbers used in the currently displayed distribution board or press the EXIT button to...

Page 17: ...which may be exported to other applications and used to create data backups or reports certificates Download manager also enables certain changes to be made to your instrument setup such as changing the 2nd language of the printouts The CD contains a user guide giving you full instructions on the use of Download Manager Cable Configuration Normally a double ended 9 way D female socket lead suitabl...

Page 18: ...r difference between storage and logging is that the former applies only to insulation and continuity testing whereas all types of measurement can be logged buzzer range excluded Starting a logging session Once logging has been enabled and the interval set up a session of data logging can begin see Setup Modes 1 Hold down the key and turn the rotary switch to the desired function 2 Release the key...

Page 19: ...d Viewing logged data Logged results can only be retrieved via the instrument s RS232 port using a PC connected via a serial cable The disk supplied with the instrument carries a programme capable of handling the data The method is similar to that for downloading stored results For further information see the section entitled Download to PC Note that on millivolts d c and milliamps d c measurement...

Page 20: ...port language is displayed as 1 English or 2 as given on the type label on the User Guide cover Note Language 2 can be changed see below 3 Press the key until the required language setting is displayed 4 To save the new setting press the key The bleeper sounds and is Std displayed To abort the new setting press the EXIT button Changing the Second Printer Language Language 2 can be changed using Do...

Page 21: ... suitable for use with Megger insulation test instruments up to 1kV output test voltage Safety Meets the safety requirements for double insulation to IEC1010 2 031 1995 EN61010 2 031 1995 IEC 1010 1 1995 EN61010 1 1995 Category III 300 V phase to earth and 500V phase to phase The probe is fitted with an internal non replaceable fuse to protect the user should the probe be used accidentally in conj...

Page 22: ...ng to be used for an extended period of time Fuse Checking and Replacement To check the instrument fuse switch to an insulation range and press the TEST button The symbol will appear if the fuse is ruptured To replace the fuse disconnect the test leads switch the instrument OFF and loosen the captive screws holding the battery compartment cover in place Remove the cover and replace the fuse Replac...

Page 23: ...0GΩ 2 2 digits 0 8 per GΩ 100V 20GΩ 2 2 digits 2 0 per GΩ 50V 10GΩ 2 2 digits 4 0 per GΩ Note Above specifications only apply when high quality silicone leads are being used Measuring Range 0 01MΩ to 200GΩ 0 100GΩ on analogue scale EN61557 Operating range 0 10MΩ to 1 00GΩ Leakage Current 10 3digits CONTINUITY Measuring Range 0 01Ω to 99 9Ω 0 to 10Ω on analogue scale EN61557 Operating range 0 10Ω t...

Page 24: ... a c 50 60Hz 2 3 digits 0 1mV to 10mV a c 16 460Hz 5 7 digits 10mV to 1999mV a c 16 460 Hz 5 5 digits d c milliVolts zeroing Up to 9 9mV Input resistance 3MΩ CAPACITANCE Measuring Range 0 1nF to 9 99uF Accuracy 3 2 digits 0 2nF uF zeroing Up to 10nF MILLI AMPS Measuring Range 0 1mA to 500mA 0 to 1000mA on analogue scale Accuracy 0 1mA to 10mA d c or a c 50 60 Hz 2 5 digits 10mA to 500mA d c or a c...

Page 25: ...ment range measuring low resistance is 0 10Ω to 99 9Ω When checking that a measurement does not exceed a limit the service error needs to be taken into account and these tables enable this to be done quickly and easily These will guarantee that the value being measured is greater than or less than the limit value specified as appropriate Insulation Resistance MΩ Limit Min Indicated Reading Limit M...

Page 26: ... 2 Insulation resistance Part 4 Resistance of earth connection and equi potential bonding FUSE 500mA 500V 32x 6mm Ceramic HBC 10kA minimum E M C The instruments meet 61326 1 POWER SUPPLY Battery Type 6x1 5V Alkaline cells IEC LR6 type or 1 2V NiCd re chargeable cells Battery Life typical 2100 5 sec 1kV insulation tests 3200 5 sec 500V insulation tests 4000 5 sec 250V insulation tests 2700 5 sec co...

Page 27: ...6420 112 Optional Part Number Fused lead set FPK8 6111 218 Switch Test Probe SP6F 6220 836 Test Record Cards Pack of 20 6111 216 PowerSuite 6111 237 NiceOne 6111 403 9 way Serial Lead 25955 025 Publications A Stitch in Time AVTM21 P8B Testing Electrical Installations 6231 605 ...

Page 28: ... contact Megger Limited or Megger Archcliffe Road Valley Forge Corporate Center Dover 2621 Van Buren Avenue Kent CT17 9EN Norristown PA 19403 England U S A Tel 44 0 1304 502243 Tel 1 610 676 8579 Fax 44 0 1304 207342 Fax 1 610 676 8625 or an approved repair company Approved Repair Companies A number of independent instrument repair companies have been authorised for repair work on most Megger inst...