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1. SAFETY WARNINGS

1.1. International Safety Symbols

Warning of a potential danger, comply with instruction manual.

Caution! Dangerous voltage. Danger of electrical shock.

Double insulation.

1.2. Safety Notes

• Reference. Please use utmost attention.
• Do not exceed the maximum allowable input range of any function
• Be sure to read the instructions carefully before using and check that the 

battery is adequate. Do not remove the voltage detector without 
authorization from professional technicians. If the voltage detector is not 
used for a long time, take out the battery and store it in a dry tool box.

1.3. Safety Advices

• Depending on the internal impedance of the voltage detector there will be 

a different capability of indicating the presence or absence of operating 
voltage in case of the presence of interference voltage.

• A voltage detector of relatively low internal impedance, compared to the 

reference value of 100kΩ, will not indicate all interference voltages having 
an original voltage value above the ELV level. When in contact with the 
parts to be tested, the voltage detector may discharge temporarily the 
interference voltage to a level below the ELV, but it will be back to the 
original value when the voltage detector is removed.

• When the indication "voltage present" does not appear, it is highly 

recommended installing earthing equipment before work.

• A voltage detector of relatively high internal impedance, compared to the 

reference value of 100kΩ, may not permit to clearly indicate the absence 
of operating voltage in case of presence of interference voltage.

• When the indication "voltage present" appears on a part that is expected 

to be disconnected of the installation, it is highly recommended 
confirming by another means (e.g. use of an adequate voltage detector, 
visual check of the disconnecting point of the electric circuit, etc.) that 
there is no operating voltage on the part to be tested and to conclude 
that the voltage indicated by the voltage detector is an interference 
voltage.

• A voltage detector declaring two values of internal impedance has passed 

a performance test of managing interference voltages and is (within 

 

 

Summary of Contents for MT476

Page 1: ...INSTRUCTION MANUAL 690V VOLTAGE TESTER MT476...

Page 2: ...2...

Page 3: ...on 8 4 Explanation of Symbols 9 5 Inserting Changing the Batteries 9 6 Measuring Point Lighting 9 7 Carrying Out Measurements 10 8 Voltage Measurement with Low Internal Impedance 10 9 Rotating Field D...

Page 4: ...an original voltage value above the ELV level When in contact with the parts to be tested the voltage detector may discharge temporarily the interference voltage to a level below the ELV but it will...

Page 5: ...the ranges specified and within low voltage systems up to 690V Prior to usage ensure perfect instrument function e g on known voltage source The voltage testers may no longer be used if one or severa...

Page 6: ...If the safety of the operator cannot guarantee the instrument must be fixed If the following situations occur security is no longer guaranteed Appropriate Usage The instrument may only be used under...

Page 7: ...LV a c LCD On 4 5V AC DC Single pole Phase Test Voltage range 100 400V AC ACV Frequency range 50 60Hz Continuity Test Resistance range 400k Test current 5 A Overvoltage protection 400V AC DC 690V DC R...

Page 8: ...3 Measurement point illumination 4 LEDs for voltage display 5 LED for single pole phase test 6 LED for low impedance test 7 LED for left right rotary field 8 LED for continuity 9 Low impedance switch...

Page 9: ...ible use alkaline batteries They guarantee a longer service life Then carefully close and screw down the battery compartment lid again The batteries need to be changed if the Low Bat symbol lights up...

Page 10: ...ay If the measured voltage falls below 4 5 V AC DC the voltage tester switches off automatically The LCD display shows the voltage values numerically and in the form of a bargraph The type of voltage...

Page 11: ...ECTION DISPLAY The voltage tester can show the direction of the rotating field with three phase systems Hold the voltage tester by the handles and provided Never touch the device beyond the handle end...

Page 12: ...tage tester can also be used as a single pole phase tester Always hold the voltage tester by the handles designed for this purpose 3 and 6 Never touch the device beyond the handle ends This phase test...

Page 13: ...he device has become unusable dispose of it in accordance with the current statutory regulations 13 DISPOSAL OF BATTERIES AND RECHARGEABLE BATTERIES You as the end user are required by law Battery Ord...

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Page 16: ...www major tech com www majortech com au sales major tech com info majortech com au MAJOR TECH PTY LTD South Africa Australia...

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