Megger BMM2500 User Manual

Insulation multimeters

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User manual (83 pages)

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Page 1 F +1 416 298 0848 E casales@megger.com This instrument is manufactured in the United Kingdom. The company reserves the right to change the specification or design without prior notice. Megger is a registered trademark Part No. 6172-491 V06 0207 www.megger.com...
Page 2 BMM2500 Insulation Multimeters User Guide...
Page 3: Table Of Contents
CONTENTS Safety Warnings General Description Continuity Testing Continuity Bleeper Millivolt Tests Capacitance Tests Milliamps Tests Storing Results Datalogging Setup Modes Specification Symbols used on the instrument are: Repair and Warranty Risk of Electric Shock Refer to User Guide. Equipment protected throughout by Double Insulation (Class II).
Page 4: Safety Warnings
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-energized and isolated before connections are made except for voltage measurement. , Circuit connections must not be touched during a test.
Page 5: General Description
The BMM2500 Series instruments have the unique capability of being able to measure voltages down The BMM2500 series instruments have a current to a resolution of 0,1mV. This gives the user the facility which enables up to 500mA to be measured, this together with Ω, V and mV ranges...
Page 6 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.
Page 7 OPERATION Refer to Safety Warnings before using voltages above 30V, particularly in high energy the instrument systems. Fused test leads are available as optional accessories for local situations where Testing is automatically inhibited if: increased protection is required. • An external voltage >25V is present when switched to any insulation range position.
Page 8 Insulation enabled). The last reading will hold on the display. Tests (MΩ) 5. Any capacitive circuits charged during a test (See fig.1) will automatically discharge. If significant voltage remains the voltage warning will occur The insulation tests and the voltage present displayed. apply known 6.
Page 9 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 Accessories page.
Page 10: Continuity Testing
Continuity Testing (Ω) (See fig.2) 3. When the reading has stabilised, press The continuity tests are activated when the probes the TEST button. make contact of less than a few kΩ. The test zero offset operates without the need to press the TEST symbol will button.
Page 11: Continuity Bleeper
Possible sources of error the same way as the continuity ranges. Measurements and results can be effected by the 1. Set the selector switch to kΩ. following: 2. Connect the test leads. 3. The test will activate automatically. • impedance operating circuits connected in parallel...
Page 12: Millivolt Tests
range (0,01kΩ to 10000kΩ) make the resistance 2. Select either a.c. or d.c. mV using the ∼ range very useful for general purpose testing. key. 3. Connect the test leads. Voltage Tests (V) 4. After a short settling time, the reading will be displayed automatically.
Page 13: Capacitance Tests
mV press the key again. For inputs less than The range is suitable for the testing of discrete 10mV frequency is not displayed. components and short low interference level signal lines. If electrolytic capacitors are being tested Capacitance Tests (uF) then the red lead should be connected to +ve of the capacitor.
Page 14: Storing Results
Storing Results on MΩ and Ω (RCL) ∼ key. After an insulation test or continuity test the result 1. Set the selector switch to mA. is displayed on the screen, this may be saved with 2. Connect the test leads. additional information.
Page 15 Testing may now continue with all subsequent procedure aborted by pressing the EXIT results associated with the new distribution board button. number. 7. When the result is saved, the code Std is displayed (accompanied by a long bleep) to Storing a result confirm that the data has been saved.
Page 16 Delete all data The distribution board numbers are shown in 1. Move the rotary selector switch to the RCL the order that the results were stored. A long position. The code rcl is displayed. bleep is sounded when the end of the list is ∼...
Page 17: Datalogging
the above order. Hold a key down to auto- guide giving you full instructions on the use of repeat. A long bleep is sounded when the end Download Manager. of the list is reached. Cable Configuration 7. Press the EXIT button to return to the circuit Normally, a double-ended 9-way ‘D’...
Page 18: Setup Modes
Storage v. Datalogging Comparison. Starting a logging session By storage, we mean the saving to memory of Once logging has been enabled and the interval results one-by-one as tests are performed. Each set up, a session of data-logging can begin. (see result has to be individually saved after associating Setup Modes) it with user-selectable connection data and circuit...
Page 19 Contact Megger Product Support for details. Viewing logged data. Logged results can only be retrieved via the Printer Setup Mode instrument’s RS232 port, using a PC connected via...
Page 20 given by a printer, and therefore waits at the end of Note: Language 2 can be changed – see below. each line. This time (“Printer delay time”) and the 3. Press the key until the required language printer report language can be changed. setting is displayed 1.
Page 21 Using the Megger SP6F Switched Probe Operation Battery Replacement The Megger SP6F is an accessory for designated When the low battery symbol appears, the cells Megger installation test instruments. When fitted in are nearly exhausted and should be replaced as the specially designed connector, in place of the soon as possible.
Page 22 cells are fitted 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. Fuse Checking and Replacement To check the instrument fuse, switch to an insulation range and press the TEST button.
Page 23: Specification
0,01MΩ to 200GΩ (0-100GΩ on analogue scale). EN61557 Operating range: 0,10MΩ to 1,00GΩ Nominal Test Leakage Current: 10% ±3digits 250V,500V,1000V (BMM2500) Voltage (d.c.): 50V,100V,250V,500V,1000V (BMM2580) CONTINUITY Test voltage accuracy: +15% maximum on open circuit Short circuit current: < 2 mA Measuring Range: 0,01Ω...
Page 24 VOLTAGE MILLI-AMPS Measuring Range: ±1V to ±500V (0 to 1000V Measuring Range: 0,1mA to 500mA (0 to 1000mA on on analogue scale) analogue scale) Accuracy: 0-500V d.c. ±2% ±3 digit Accuracy: 0,1mA to 10mA d.c. or a.c. (50/60 Hz) ±2% ±5 digits 0-500V a.c (50/60Hz) ±2% ±3 digits 10mA to 500mA d.c.
Page 25 Basic and service errors for Insulation Resistance – MΩ Insulation and Resistance ranges. Limit Min. Indicated Reading Limit Min. Indicated Reading The basic error is the maximum inaccuracy of the 0,10 0,14 2,00 2,12 instrument under ideal conditions, whereas the service 0,20 0,25 3,00...
Page 26 SAFETY POWER SUPPLY The instruments meet the requirements for double Battery Type: 6x1,5V Alkaline cells insulation to IEC 1010-1 (1995), EN 61010-1 (1995) to IEC LR6 type or 1.2V NiCd Category III*, 300 Volts phase to earth (ground) and 440 re-chargeable cells.
Page 27 ACCESSORIES Supplied: Part Number Test lead set 6220-437 Test-&-carry case 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’...
Page 28: Repair And Warranty
A number of independent instrument repair companies board. If the protection of an instrument has been have been authorised for repair work on most Megger impaired it should not be used, and be sent for repair by instruments, using genuine Megger spare parts. Consult suitably trained and qualified personnel.

Megger BMM2500 User Manual

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