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 megger limited archcliffe road, dover kent ct17 9en england t +44 (0)1 304 5021...
User guide m bmm2500 insulation multimeters.
Contents 2 symbols used on the instrument are: risk of electric shock refer to user guide. Equipment protected throughout by double insulation (class ii). Equipment complies with current eu directives. Equipment must not be connected to installations >500v. >500v safety warnings 3 general descriptio...
3 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 to...
General description 4 the megger ® bmm2500 series instruments are battery powered insulation and continuity testers, with a measurement capability from 0,01 Ω continuity to 200g Ω insulation. Offering multi-voltage facilities, the instruments take full advantage of microprocessor technology and feat...
5 the bmm2500 series instruments have an rs232 interface built in, and will allow the storage and download of results to a pc. The instruments come with all the necessary software to download and tabulate the results. The download format is also powersuite compatible enabling instruments to form par...
Operation 6 refer to safety warnings before using the instrument testing is automatically inhibited if: • an external voltage >25v is present when switched to any insulation range position. • an external voltage >10v is present on all other ranges (excluding off/v/mv). The external voltage is indica...
∼ 7 insulation tests (m Ω) (see fig.1) the insulation tests apply a known voltage to the circuit under test and measure the resulting leakage current. The circuit under test must be completely de- energised and isolated before test connections are made. Insulation tests are only initiated when the t...
8 good procedure whilst insulation testing care must be taken when taking measurements greater than a few g Ω. The leads must be clean dry and in good condition. They must also not be allowed to tangle. It is also advisable that the switched probe sp6f is not used as the accuracy at high value measu...
Continuity testing ( Ω) (see fig.2) the continuity tests are activated when the probes make contact of less than a few k Ω. The test operates without the need to press the test button. When the test leads are removed the reading will hold for a few seconds and then reset. To recall the last result p...
10 possible sources of error measurements and results can be effected by the following: • the impedance of operating circuits connected in parallel • impedance such as inductors that vary during the measurement • a poor connection to the circuit under test. Continuity bleeper the continuity bleeper ...
∼ 11 range (0,01k Ω to 10000kΩ) make the resistance range very useful for general purpose testing. Voltage tests (v) if >1v a.C. Or d.C. Is present at the terminals the measured voltage is indicated on the display. The voltage display will function within specification even if the fuse has blown. If...
12 mv press the key again. For inputs less than 10mv frequency is not displayed. Capacitance tests (uf) (bmm2580 only) the measured capacitance is indicated on the display. 1. Set the selector switch to uf. 2. Connect the test leads to the circuit under test. 3. After a short settling time, the read...
∼ 13 key. 1. Set the selector switch to ma. 2. Connect the test leads. 3. Select either a.C. Or d.C. Ma using the key. 4. Press and hold down the test button for approx. 2 seconds. 5. After a short settle time, the reading will be displayed automatically. To view the frequency of the a.C. Ma being m...
14 testing may now continue with all subsequent results associated with the new distribution board number. Storing a result on completion and display of the measurement:- 1. Press and hold the key. After about 1 second, a bleep will be heard. For both continuity and insulation, a code, as given in t...
15 delete all data 1. Move the rotary selector switch to the rcl position. The code rcl is displayed. 2. Press the and keys together. The code del is displayed. 3. Confirm that the data is no longer required by pressing the key or abort by pressing any other key. The code rcl is displayed. Print res...
16 the above order. Hold a key down to auto- repeat. A long bleep is sounded when the end of the list is reached. 7. Press the exit button to return to the circuit number selection screen, or press the key to scroll through the stored test results, together with any additional connection information...
17 storage v. Datalogging comparison. By storage, we mean the saving to memory of results one-by-one as tests are performed. Each result has to be individually saved after associating it with user-selectable connection data and circuit number, along with a previously chosen distribution board number...
18 alternatively, logging can be left running and will stop automatically a short while after the memory becomes full. The number of results which can be logged is about 300, after which the message ‘full’ will be flashed on the display for a few minutes. The instrument will then shut down. Other co...
∼ 19 given by a printer, and therefore waits at the end of each line. This time (“printer delay time”) and the printer report language can be changed. 1. Press and hold the key then turn the rotary selector switch from the off position to the rcl position. The code pdt is displayed. 2. Release the k...
∼ 20 setting the data-logging interval. 1. While log is being displayed, press the key. Int will appear on the display. 2. Press the key to see the value of the logging interval (in seconds) 3. Set the interval in 10 second steps with the and keys (max. Value 1990 seconds, min. Value 10 seconds) 4. ...
21 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 ch...
Specification 22 (all quoted accuracies are at +20ºc.) insulation ranges nominal test 250v,500v,1000v (bmm2500) voltage (d.C.): 50v,100v,250v,500v,1000v (bmm2580) test voltage accuracy: +15% maximum on open circuit short circuit current: test current on load: 1ma at min. Pass value of insulation spe...
23 voltage measuring range: ±1v to ±500v (0 to 1000v on analogue scale) accuracy: 0-500v d.C. ±2% ±3 digit 0-500v a.C (50/60hz) ±2% ±3 digits 0-500v 400hz a.C. ±5% ±3 digits input resistance: approx 200k Ω. Detector threshold: 1v millivolts measuring range: ±0,1mv to ±1999mv (0 to 1000mv on analogue...
24 basic and service errors for insulation and resistance ranges. The basic error is the maximum inaccuracy of the instrument under ideal conditions, whereas the service error is the maximum inaccuracy taking into effect of battery voltage, temperature, interference, and system voltage and frequency...
25 safety the instruments meet the requirements for double insulation to iec 1010-1 (1995), en 61010-1 (1995) to category iii*, 300 volts phase to earth (ground) and 440 volts phase to phase, without the need for separately fused test leads. If required, fused test leads are available as an optional...
26 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 ...
Repair and warranty 27 the instrument circuit contains static sensitive devices, and care must be taken in handling the printed circuit board. If the protection of an instrument has been impaired it should not be used, and be sent for repair by suitably trained and qualified personnel. The protectio...
