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M
MTB7671/2
Test box
User Guide

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Summary of Contents for Megger MTB7671

  • Page 1 MTB7671/2 Test box User Guide...
  • Page 2: G Safety Warnings

    „ Only use the MTB7671/2 when both polarity indicator LEDs are lit. „ The MTB7671/2 is protected by an integral RCD plug which MUST NOT be removed from the tester. „ The interlock protected 13 A socket should only be used with double insulated RCD and Loop testers.
  • Page 4: Operation

    SWITCHING ON To switch on the MTB7671/2, plug the unit into the 230 V 50 Hz mains supply using the integral RCD plug and depress the button on the top of this plug and release, this will switch the plug on.
  • Page 5 TESTING A CONTINUITY TESTER Connect the tester to the continuity and insulation connection sock- ets in the orange and red section of the test box. Warning: Do not apply more than 250 mA. Current Test Set the continuity and insulation test select switch to [I TEST] and perform a continuity test.
  • Page 6 TESTING AN INSULATION TESTER Connect the test instrument to the continuity and insulation connec- tion sockets in the orange and red section of the test box. Warning: Do not apply more than 1250 V d.c. Voltage load test @ 250 V Set the continuity and insulation test select switch to [250 V] and per- form an insulation test with the test instrument set to 250 V output.
  • Page 7 1 MΩ +/-3% is used to provide the test reference. The tester should indicate a measured value of 1 MΩ (+/- operational errors including the tester’s accuracy). If either of the LEDs fail to light the tester should be returned for a full calibration.
  • Page 8 Connect the tester to the RCD and loop test supply socket. When the interlock cover is closed, the earth pin of this socket is connected to the supply neutral. Note: The MTB7671/2 can be used to perform either ‘No Trip’ or ‘High Current’ loop tests. Conducting a Loop Test Set the RCD and loop test select switch to [Loop] and perform a loop test using the tester.
  • Page 9 TESTING AN RCD TESTER Connect the tester to the RCD and loop test supply socket. When the interlock cover is closed, the earth pin of this socket is connected to the supply neutral. Pre-Test Setup Set the RCD test current on the tester and move the RCD and loop test select switch to the appropriate position (e.g.10 mA, 30 mA or 100 mA).
  • Page 10: Fuse Replacement

    If the tester fails to indicate a tripped RCD then the tester should be returned for a full calibration. ✍ - Record the reading on the record card. To reset the test box press the [reset] button in the yellow panel. Conducting a 5I @ 180°...
  • Page 11 BS7671 MTB7671 & tester Megger test Calibration BS EN61557 requirements parameters points Continuity short >200 mA >200 mA >200 mA Circuit test Pass/Fail indication Current (Threshold limits ±2%) Continuity test 4 V - 24 V 4 V - 24 V...
  • Page 12: Mains Supply

    Operation Safety Meets the requirements of IEC61010-1. Refer to safety warnings supplied. Environment Conditions The MTB7671/2 is intended for indoor use only. Cleaning Wipe disconnected instrument with a clean cloth moistened with soapy water or Isopropyl Alcohol (IPA). Accessories Description...
  • Page 13: Repair And Warranty

    Approved Repair Companies Megger operates fully traceable repair and calibration facilities complemented by a network of approved repair and calibration companies, to offer excellent in-service care for your Megger products. Megger’s streamlined Returns Authorization system ensures your product is expected and enables you to track its progress on-line.
  • Page 14 T +1 416 298 6770 F +1 416 298 0848 E casales@megger.com Megger products are distributed in 146 countries worldwide. This instrument is manufactured in the United Kingdom. The company reserves the right to change the specification or design without prior notice.

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