DT-9055 Earth Tester | Fault Loop Measurement | 1999Ω Range | Two-Color LCD Display

DT-9055 EARTH TESTER

Professional Fault Loop Earth Resistance Measurement Instrument

The DT-9055 Earth Tester is a professional instrument designed for measuring earth resistance using the fault loop measurement principle. With its 3½ digit display, two-color backlit LCD, and compact design, this tester provides accurate earth resistance measurements for electrical installations with neutral connections.

Key Features:

Advanced Measurement Technology:

• Principle of measurement by "fault loop" for installations with neutral as per diagram indication

• Earth loop measurement current less than the drop-out threshold of the 30mA circuit breakers

• Measurement of the earth resistance by 3½ digit display from 0 to 1999Ω

• Resolution: 1Ω with measurement updated every 1.5 seconds

Professional Design and Safety:

• Two-colour back-lit LCD display for clear visibility in all lighting conditions

• IEC 61010-1 EN 61557-4 compliant for electrical measurement safety

• Installation category III for appropriate voltage level applications

• Class II double insulation construction

• IP40 protection against solid objects

• IK06 impact resistance rating

Technical Specifications:

Measurement Ranges and Accuracy:

• 0.0Ω - 19.9Ω range: ± 0.8 Ω accuracy

• 19.9Ω - 99.9Ω range: ± 6.5 Ω accuracy

• 100Ω - 999Ω range: ± 7.5 Ω accuracy

• 1.00kΩ - 2.00kΩ range: ± 16.0 Ω accuracy

• Total measurement range: 0 to 1999Ω

Electrical Specifications:

• Operating voltage: 230V(Ph/N) -10/+6%

• Operating frequency: 50/60Hz

Physical Specifications:

• Weight: 415g (compact and portable)

• Size: 195mm x 70mm x 48mm (H x W x D)

Measurement Principle Advantages:

Safe Fault Loop Method:

• Non-intrusive measurement without disconnecting earth connections

• Test current below 30mA to prevent RCD nuisance tripping

• Measurement of installed earth systems in actual operating conditions

• Quick and efficient testing procedure

Professional Applications:

Electrical Installation Testing:

• Earth resistance measurement in new installations

• Periodic inspection and testing of existing systems

• Verification of earth electrode effectiveness

• Earth continuity testing of protective conductors

Compliance and Certification:

• Electrical installation commissioning

• Regulatory compliance testing

• Safety certification documentation

• Quality control in electrical work

Maintenance and Troubleshooting:

• Preventive maintenance programs

• Fault finding in earth systems

• Performance verification after electrical work

• Earth system condition assessment