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Summary of Contents for Major tech MT478
- Page 1 MT478 Voltage Tester User Manual 2018...
- Page 3 Index Page no...
- Page 4 1. Safety 1.1 International Safety Symbols Warning of a potential danger, comply with instruction manual. Caution! Dangerous voltage. Danger of electrical shock. Double insulation. Important information. Consult the instruction sheet Hazardous Voltage. Suitable for live working. This product complies with the WEEE Directive (2012/19/EU) Conforms to European Union Directives.
- Page 5 1. Safety 1.3 Warnings In order to avoid electrical shock, the valid safety and VDE regulations regarding excessive contact voltages must receive utmost attention, when working with voltages exceeding 120V (60V) DC or 50V (25V) rms AC. The values in brackets are valid for limited ranges (as for example medicine and agriculture).
- Page 6 1. Safety 1.4 The safely can no longer be insured if the instrument: • Shows obvious damage • does not carry out the desired measurements • has been stored for too long under unfavorable conditions • has been subjected lo mechanical stress during transport. All relevant statutory regulations must be adhered to when using this instrument 1.5 Safety Advices...
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Page 7: Appropriate Usage
2. Appropriate Usage The instrument may only be used under those conditions and for those purposes for which it was designed. For this reason, in particular the safety references, the technical data including environmental conditions and the usage in dry environments must be followed, When modifying or changing the instrument, the operational safety is no longer ensured. - Page 8 3. Specifications Voltage detection automatic Polarity detection Full range Range detection Automatic Internal basic load Maximum 3.5 mA at 1000 V impedance Peak current 350 kΩ / ls< 3.5 mA (no RCD tripping) Operation time Duration Time = 30 seconds Recovery time Recovery Time = 240 seconds Switchable Load...
- Page 9 4. Voltage Tester Description...
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Page 10: Operation
5. Operation 5.1 Preparing the test • Prior to every test, please ensure that the instrument is in perfect condition: • For example, keep an eye out for a broken housing or leaking batteries. • Always carry out a function test before using the voltage tester, see below. -
Page 11: Single-Pole Phase Test
5. Operation 5.3 Single-pole phase Test • The single-pole phase test is only possible when batteries are installed and in good condition. • The single-polephase test starts at an AC voltage of approx.100V (pole>100V AC). • When using single-pole phase tests to determine external conductors the display function may be impaired under certain conditions (e.g. - Page 12 5. Operation 5.6 Resistance Test • The Tester measures low ohm resistance between 1Ω and 1999Ω at a resolution of 10. To do a resistance test: • Do a Voltage test to make sure the UUT (unit under test) is not live. •...
- Page 13 5. Operation "L" signifies that the supposed phase L1 is the actual phase L2 and the supposed phase L2 is the actual phase L1. When re-testing with exchanged test probes the opposite symbol has to be illuminated. 5.8 Measurement Point Illumination Voltage testers are equipped with a measurement point illumination feature.
- Page 14 5. Operation 5.11 Battery Replacement • If no signal sound is audible when short-circuiting the test probes or display battery symbols on the screen, proceed with the battery replacement. • Completely disconnect voltage tester from the measurement circuit. • Remove discharged screw , battery cover and batteries. •...
- Page 16 T9 Industrial Village, Sam Green Road, Tunney Ext. 9, Elandsfontein, South Africa P.O. Box 888, Isando 1600 South Africa Telephone: +27 11 872 5500 National Contact Number: 08 61 62 5678 Sales Facsimile: +27 11 822 2806 Admin Facsimile: +27 11 822 1411 E-mail: sales@major-tech.com Rev.