UT501A Insulation Resistance Tester 2000 Count

The UT501A Insulation Resistance Tester 2000 Count has built a broad user base in fields such as electrical repairs, electrical installation and factory maintenance thanks to its reliable performance and affordable price, making it a best-selling model in the entry-level insulation testing instrument market.

Core Value

'All-in-one, safe and reliable – delivering a professional-grade insulation testing experience at an entry-level price'.

Product Description from the Supplier

Xi'an Mingxi Taida Information Technology Co., Ltd. brings over 12 years of industry expertise to deliver cutting-edge measurement and control solutions.With progressed computerization forms and strict quality control, we guarantee each item meets the most noteworthy guidelines for proficient applications.

Description

The UT501A Insulation Resistance Tester is positioned as an entry-level, general-purpose insulation tester and is the main volume model aimed at the broadest possible audience of electricians. Whilst retaining the core functions of the UT500 series, it meets the vast majority of everyday insulation testing requirements at the most competitive price.

The UT501A builds on UNI-T's high-precision measurement technology in the multimeter sector, extending it to the field of high-voltage insulation testing. Its core DC high-voltage generation circuit utilises switch-mode power supply boost technology, offering advantages such as compact size, light weight and voltage stability compared to traditional hand-crank generators or mains frequency boost methods.

Key Product Features-UT501A Insulation Resistance Tester 2000 Count

Hardware Specifications

• Type: LCD display

• Display resolution: 1999-count (3½-digit)

• Display dimensions: 70.6 mm × 34 mm

• Backlight: Blue backlight for easy reading in low-light conditions

• Display information: Insulation resistance value, test voltage range, low battery indicator, overload indicator

Input Connectors

• LINE terminal: High-voltage output terminal for insulation resistance testing (red)

• EARTH terminal: Ground terminal for insulation resistance testing (black)

• V terminal: Positive input terminal for voltage measurement

• Ω terminal: Low-resistance measurement terminal

• Protection: Input overvoltage protection, protection against incorrect operation

Performance characteristics

Insulation Resistance Test

Operating Environment

• Operating temperature: 0°C to 35°C

• Storage temperature: -20°C to 60°C

• Relative humidity: ≤75% (operating), ≤80% (storage)

• Altitude: ≤2000 m

Key Product Function

Insulation Resistance Test Function

This is the core function of the UT501A Insulation Resistance Tester 2000 Count, used to measure the insulation resistance of electrical equipment, circuits and insulating materials.The instrument generates a stable high-voltage DC current internally, which is applied across the ends of the insulating material under test. The insulation resistance value is calculated by measuring the leakage current. The higher the insulation resistance, the better the insulation performance.

DC Resistance Test Function (Low Resistance Measurement)

• The UT501A features a low resistance measurement function, which can be used to measure the DC resistance of motor windings, wires, switch contacts and similar components.

• Measurement range: 0.01 Ω to 200 Ω

• Test current: >200 mA; four-wire measurement principle effectively eliminates the influence of lead resistance

• Applications: Motor winding resistance measurement, switch contact resistance testing, wire continuity testing

Voltage Testing Function

• AC Voltage Measurement

• Range: 30 V to 750 V AC

• Frequency response: 50 Hz/60 Hz

• Applications: Quickly checking whether a circuit is live, measuring mains voltage, and verifying that the power is off

• Note: Before taking a measurement, ensure that the function dial is set to the ACV position.

Data Logging and Storage Functions

As an entry-level model, the UT501A does not feature built-in data storage, and test data must be recorded manually. If data logging and export functions are required, you may opt for advanced models in the same series, such as the UT502A, UT505A BT or UT515B. These models support:

• Built-in storage for over 1,000 sets of test data

• USB/Bluetooth data transfer

• PC software analysis and report generation

Automatic Calculation Functions (Polarisation Index (PI), DAR, etc.)

The UT501A supports automatic calculation of the Polarisation Index (PI) and Dielectric Absorption Ratio (DAR), which are key parameters for assessing the ageing condition of insulation.

Polarisation Index (PI)

• Definition: The ratio of the insulation resistance value after 10 minutes of application to that after 1 minute of application (R10min/R1min)

• Significance: Reflects the polarisation characteristics of the insulation material; a lower PI value indicates more severe insulation ageing

• Criteria: Generally, PI ≥ 2.0 is required; a PI < 1.0 indicates that the insulation is severely damp or aged

Dielectric Absorption Ratio (DAR)

• Definition: The ratio of the insulation resistance value after 60 seconds of application to that after 15 seconds (or 30 seconds) of application

• Significance: Reflects the degree of moisture absorption in the insulation; a lower DAR indicates more severe moisture absorption

• Criteria: Generally, DAR ≥ 1.3 is required

The UT500 series comprises several sub-models to meet the needs of different users

Note: The UT501A Insulation Resistance Tester 2000 Count is the entry-level model in the series, offering the widest range of voltage settings, the most features and the best value for money.

Comparison with similar products-Insulation Resistance Tester

Note: Among products in the same price range, the UT501A is one of the few models that supports PI/DAR calculations, low-resistance testing and AC voltage measurement, offering a far wider range of functions than its competitors in the same price bracket.

Common hazardous situations

• Residual charge on the device under test- Discharge the system thoroughly using a discharge rod before testing

• Accidental contact with the high-voltage output terminal- Keep your hands well away from the test probes during testing, and use insulated tools

• Electric shock in damp environments- Keep the instrument and your hands dry; do not conduct outdoor tests in wet weather

• Insulation failure on the test lead- Check the test leads before use; replace them immediately if they are damaged

Key Points of the Software User Manual

Names and Functions of Companion PC Software/Apps

The UT501A does not come with dedicated PC software or apps, nor does it feature data storage or communication capabilities. As an entry-level model, the UT501A focuses on core insulation testing functions, prioritising ease of use and high reliability.

Note: The UT501A Insulation Resistance Tester 2000 Count is designed as a 'plug-and-play testing tool’ rather than a ‘data logging and analysis device'. It is suitable for scenarios such as routine inspections and rapid testing, with test results read and recorded manually by the operator.

! If you are simply carrying out routine insulation testing and troubleshooting, the UT501A is perfectly adequate; however, if you require professional insulation diagnostics and need to produce formal test reports, we recommend opting for an advanced model with data storage and software capabilities.

Clients:

✅Power Systems- Insulation resistance testing of equipment such as transformers, instrument transformers, generators, high-voltage motors, power capacitors, power cables and surge arresters

✅Industrial Manufacturing- Maintenance of electrical equipment on production lines, insulation testing of motor windings, and verification of control cabinet insulation performance

✅Construction Engineering- Acceptance testing of electrical circuits in new buildings, grounding system testing, quality inspection of electrical installation works

✅Property Maintenance- Routine inspections of electrical circuits in residential estates, maintenance of lift electrical systems, insulation testing of fire safety equipment

✅Appliance Repair-  Insulation testing of household appliances such as air conditioners, refrigerators and washing machines to prevent electric shock incidents

​​​​​​​✅Education and Training- Practical training for electricians at vocational colleges, demonstrations for electrical safety instruction

​​​​​​​✅Photovoltaic and Renewable Energy- Initial inspection of photovoltaic module insulation performance, DC-side insulation testing of inverters

Custom Design

We get it that standard arrangements do not continuously meet one of a kind prerequisites. Our experienced building group gives comprehensive OEM/ODM customization administrations. Whether you require adjusted recurrence ranges, specialized activating alternatives, or custom frame components, we work closely with you to create the idealize arrangement. Our adaptable plan approach guarantees your particular application needs are completely tended to whereas keeping up our quality standards.

Why Select MXTD

Proven Encounter: Over 12 a long time of specialized skill in estimation and control frameworks development.

Expert Designing: Our gifted R&D group ceaselessly innovates to convey cutting-edge arrangements that keep you ahead of industry demands.

Quality Confirmation: Strict fabricating forms and comprehensive testing conventions guarantee dependable, steady performance.

Comprehensive Back: From starting meeting through progressing support, our committed group gives responsive specialized assistance.

Secure Conveyance: Collaborating with trusted coordinations suppliers guarantees secure, followed, and safety net provider shipment of your equipment.

Customer Center: We prioritize your victory with standard follow-ups, fast issue determination, and personalized benefit approaches.

FAQ

​​​Q: Why Unstable readings ?

A: Maybe high ambient humidity and a dirty surface,need to Clean the surface to be tested and carry out the test in a dry environment; 

​​​Q: Why the reading is low?

A: Poor insulation on the test lead; surface leakage, replace the test lead and use the Guard terminal (if available)

Q: Why the buzzer keeps going off?

A: The insulation resistance is below the alarm threshold,this is a normal warning, indicating that the test object has poor insulation

Contact Us

If you are looking for an affordable excellent choice. As the UT501A Insulation Resistance Tester 2000 Count product line, the UT501A Insulation Resistance Tester is highly competitive in the Entry-level standard model resister tester market.It doesn't make you pay for features you don't need, yet it fully meets your requirements in terms of key measurement capabilities.

Email: manager03@mxtdinfo.com /  manager02@mxtdinfo.com