KYORITSU DIGITAL INSULATION / CONTINUITY TESTER MODEL 3007A

The Ultimate Tool for Electrical Safety

Insulation resistance testing is a critical procedure in electrical maintenance, ensuring the safety and reliability of power systems. It involves measuring the resistance of electrical insulation, which, when properly functioning, prevents current from flowing between conductors or to the ground. A high insulation resistance value indicates healthy, robust insulation, while a low value can signal a compromised or damaged system, posing significant risks of electric shock, fire, and equipment failure. This is where a high-quality insulation resistance tester becomes indispensable. Our featured product is a state-of-the-art device designed to perform these essential tests with unparalleled accuracy and ease. It is engineered with the latest technology to deliver precise measurements and a suite of features that simplify complex diagnostic tasks. The device’s core function is to apply a DC voltage to the insulation and measure the resulting current, calculating the resistance according to Ohm’s law. This process, while fundamental, is executed with advanced circuitry to ensure stable and reliable readings. The importance of such a device cannot be overstated, as it is the first line of defense against potential electrical hazards. Regular testing with this tool helps preemptively identify issues, allowing for corrective action before a catastrophic failure occurs. Its robust design and intuitive interface make it suitable for both experienced professionals and those new to electrical testing. The integration of modern features like a bright, easy-to-read display and a live circuit warning system further enhances user safety and operational efficiency. Choosing the right tester is a decision that impacts not just the quality of your work, but the safety of everyone involved.

Precision and Safety in a Compact Device

This insulation resistance tester is a testament to the seamless integration of precision engineering and user-centric safety features. One of its standout attributes is the bar graph to display insulation resistance, which provides a quick, visual representation of the measured value. This is especially useful for observing trends and changes in insulation quality over time. A rapidly dropping bar, for instance, could indicate a serious and immediate problem. Another crucial safety feature is the flashing symbol display for external AC voltage. This visual alert immediately warns the user if a circuit is live and dangerous, preventing accidental contact and potential injury. The device’s auto null function is another game-changer, especially for continuity testing. It automatically subtracts the resistance of the test leads from the final reading, ensuring that the displayed continuity resistance value is accurate and represents only the circuit under test. This eliminates the need for manual calculations and reduces the potential for human error. The Trac-Lok mode is a thoughtful addition aimed at conserving battery life, particularly during extended insulation and continuity tests. It locks the measurement in place, allowing the user to focus on other tasks without the device constantly drawing power. The device also includes a live circuit warning buzzer, an audible alert that complements the visual flashing symbol, providing an extra layer of security. This combination of visual and auditory warnings makes it nearly impossible to overlook a live circuit. The safety features are further bolstered by a mechanism that automatically discharges the charges stored in the circuit under test once the test button is released. This crucial function prevents the user from receiving a residual shock and protects the equipment being tested. The backlight function is a practical feature that ensures the display is visible in poorly lit environments, a common challenge in many industrial and commercial settings. Finally, the 200mA measuring current on continuity testing provides the necessary power to accurately and reliably test circuits, even those with low resistance.

Advanced Features for Enhanced Diagnostic Capabilities

Beyond its fundamental testing functions, this device offers a range of advanced features that elevate its diagnostic capabilities. The insulation resistance test itself is highly customizable with test voltages of 250V, 500V, and 1000V, allowing the user to select the appropriate voltage for the specific application. This flexibility is essential for testing a wide variety of equipment, from low-voltage electronics to high-voltage industrial machinery. The measuring ranges for insulation resistance are equally impressive, spanning 20MΩ, 200MΩ, and 2000MΩ. The device automatically selects the correct range, but a manual override is also available for expert users. The output voltage on open circuit is precisely controlled to be the rated test voltage plus 20% and minus 0%, ensuring that the test is performed under strict conditions. The nominal current is a minimum of 1mA DC, which is sufficient to obtain reliable measurements without stressing the insulation. The output short circuit current is limited to approximately 1.5 mA DC, a safety feature that protects both the device and the user in the event of a short. The accuracy of the insulation resistance measurements is exceptionally high, with a tolerance of ±1.5%rdg±5dgt for the 20/200MΩ ranges and a slightly wider but still very precise ±10%rdg±3dgt for the 2000MΩ range. This level of accuracy is critical for making informed decisions about the condition of electrical systems. The continuity test features are also top-notch, with measuring ranges of 20Ω, 200Ω, and 2000Ω, and an output voltage on open circuit of 7 to 12V DC. The measuring current of 200mA DC minimum ensures that continuity is verified with sufficient current to detect even subtle faults. The continuity accuracy is also excellent at ±1.5%rdg±5dgt for the 20Ω range and ±1.5%rdg±3dgt for the 200/2000Ω ranges. This comprehensive suite of features makes the device a versatile and powerful tool for any electrical professional.

Essential Applications for Electrical Professionals

The applications of this insulation resistance tester are vast and varied, making it a staple in the toolkit of any professional involved in electrical installation, maintenance, or repair. Its primary use is in commissioning new electrical installations to verify that the wiring and components are properly insulated before the system is energized. This is a critical step in ensuring long-term safety and compliance with electrical codes. The device is also invaluable for routine preventative maintenance in commercial and industrial settings. Regular testing of motors, transformers, and switchgear can identify early signs of insulation degradation, allowing for timely repairs or replacements, which can prevent costly breakdowns and production downtime. In the field of troubleshooting and fault finding, this tester is indispensable. When a circuit fault is suspected, it can quickly and accurately pinpoint issues like damaged insulation, moisture ingress, or short circuits. For example, a technician can use the device to test the insulation of individual motor windings to determine if a motor failure is due to insulation breakdown. The device is also widely used in automotive and marine electrical systems, where insulation integrity is paramount due to harsh environmental conditions like vibration, heat, and moisture. Its ability to perform both insulation and continuity tests makes it a versatile tool for diagnosing a wide range of electrical problems in vehicles and boats. Furthermore, the tester is crucial for quality control in manufacturing. Manufacturers of electrical equipment, cables, and components use it to verify that their products meet specified insulation resistance standards before they are shipped to customers. The device’s robust design and comprehensive feature set ensure that it can handle the demanding requirements of these diverse applications, providing reliable results every time. Its user-friendly interface and portability make it a go-to tool for field service technicians who need to perform quick, accurate tests on the go.

The Science Behind Insulation Resistance Testing

Understanding the science behind insulation resistance testing is key to appreciating the capabilities of this sophisticated device. The test is fundamentally based on Ohm’s Law, which states that resistance is equal to voltage divided by current ($R=V/I$). The tester applies a known DC voltage (250V, 500V, or 1000V) across the insulation and measures the minuscule current that leaks through it. A healthy, high-quality insulator will have a very high resistance, resulting in an extremely small leakage current. Conversely, a damaged or contaminated insulator will have a lower resistance, leading to a larger leakage current. The resistance value is not just a single number; it’s a measure of the material’s ability to resist the flow of current. The test’s effectiveness lies in its ability to detect hidden flaws that are not visible to the naked eye, such as microscopic cracks, moisture absorption, or chemical degradation. Another important concept is the Polarization Index (PI), which is a ratio of the insulation resistance measured at 10 minutes to the resistance measured at 1 minute. A high PI value (typically greater than 2) indicates dry, clean, and healthy insulation. A low PI value suggests a problem, such as moisture contamination. While this specific device may not calculate the PI automatically, its stable and accurate measurements allow a technician to manually perform this calculation. The test voltage itself plays a crucial role. A higher test voltage can reveal flaws that a lower voltage might miss, as it puts more stress on the insulation, mimicking the conditions of a high-voltage surge. The device’s ability to provide multiple test voltages therefore makes it a versatile tool for a variety of diagnostic scenarios.

Unmatched Performance and Durability Standards

The design and construction of this insulation resistance tester adhere to the highest international standards for performance and durability. It is built to withstand the rigors of professional use in demanding environments. The device complies with the IEC 61010-1 CAT III 300V Pollution Degree 2 standard, which specifies the safety requirements for electrical equipment for measurement, control, and laboratory use. This certification ensures that the device is safe for use in a wide range of applications, from domestic electrical systems to light industrial environments. The IEC 61010-2-031 and IEC 61010-2-034 standards further specify the safety requirements for handheld probes and insulation resistance testers, respectively, highlighting the meticulous attention to detail in its design. The device also meets the IEC 61557-1,2,4 standards, which are specific to electrical safety in low-voltage distribution systems, particularly for insulation resistance, continuity, and resistance measurements. The IEC 60529 (IP54) rating indicates its ingress protection level, meaning it is protected against dust ingress sufficient to prevent damage and is protected against splashing water from any direction. This makes it suitable for use in dusty workshops or in locations where it might be exposed to rain or splashes. The IEC 61326-1 (EMC) standard ensures that the device operates reliably in environments with electromagnetic interference and that it doesn’t emit levels of interference that could affect other equipment. These certifications are not just labels; they are a guarantee of the device’s quality, safety, and reliability. Its robust construction and adherence to these standards make it a long-lasting and trustworthy investment for any professional. The included accessories, such as the test leads (7122B), cord case (9074), and shoulder strap (9121), are all designed to complement the device’s durability and ease of use.

Power, Portability, and User-Friendly Design

The physical design of this insulation resistance tester is a perfect blend of power, portability, and user-friendliness. Measuring at a compact 167(L) x 185(W) x 89(D)mm, it is designed to be easily carried and used in tight spaces. Its weight of approximately 990g makes it lightweight enough to be held with one hand for extended periods without fatigue. The device is powered by eight standard R6 (AA) (1.5V) batteries, which are readily available and inexpensive. This choice of power source ensures that the device can be used virtually anywhere without the need for a proprietary charger or specialized batteries, which can be a significant advantage in the field. The included shoulder strap and cord case further enhance its portability, allowing technicians to carry it hands-free and keep the test leads and other accessories neatly organized. The intuitive layout of the controls and the clear, backlit display make it easy to operate, even for those with limited experience. The bar graph and flashing symbols provide instant feedback, reducing the cognitive load on the user. The manual also includes a detailed instruction manual to guide users through the various functions and applications. The device’s physical features are a direct reflection of its purpose: to be a reliable, portable, and easy-to-use tool for professionals who need to perform critical electrical tests quickly and accurately. Its design prioritizes the user experience, from the moment it’s powered on to the moment the test results are recorded.

Your Guaranteed Source for Quality and Authenticity

When investing in a critical piece of equipment like an insulation resistance tester, you must ensure you are getting an authentic, high-quality product. This is where tpt24 online store stands out as the premier global destination for this device. We guarantee the authenticity and quality of every product we sell. Our direct relationships with manufacturers and stringent quality control processes mean that you will receive a genuine product that meets all the specifications and safety standards outlined in this article. We understand the importance of reliability and trust in the electrical industry, and we are committed to providing our customers with nothing but the best. Whether you are in a bustling city or a remote location, tpt24 delivers this product to you with the utmost care and efficiency, no matter which country you are in. Our global shipping network ensures that your order arrives promptly and in perfect condition. We offer a comprehensive warranty and dedicated customer support to address any questions or concerns you may have. When you purchase from tpt24, you are not just buying a product; you are investing in peace of mind, knowing that you have a reliable tool backed by a reputable retailer. Our commitment to excellence is reflected in our customer reviews and our long-standing reputation as the world’s leading online store for this product. Trust tpt24 for your professional needs and experience the difference that quality and authenticity make.