The Water - Cooled Insulation Tester is specifically designed for measuring water - cooled generators, catering to both laboratory and on - site insulation testing needs. It can deliver high currents (over 20mA), with output voltages available at 2500V and 5000V levels. The device features a high - precision micro - current measurement system and a digital boost system, allowing automatic measurement via just one high - voltage line and one signal line connected to the test item.
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Description
Technical Parameters
Product Video
HM2020 Water-Cooled Insulation Resistance Tester Display Video
Products Description
The HM2020 Insulation Resistance Tester is specifically designed for measurement tests on water-cooled generators, whilst also being suitable for insulation testing in laboratories or on-site. It delivers an output current exceeding 20mA and a maximum output voltage of 5000V. Incorporating a high-precision microcurrent measurement system and digital voltage-boosting system, it requires only a single high-voltage lead and one signal lead to connect to the test specimen for measurement. The measurement process is fully automated, with results displayed on a large LCD screen and stored for future reference.
Features & Advantages
1. Utilises a 32-bit microcontroller with a fully Chinese-language interface for user-friendly operation.
2. Automatically calculates the absorption ratio and polarisation index, storing minute-by-minute data at 15-second, 1-minute, 2-minute, and 10-minute intervals for analysis.
3. Delivers high output current (exceeding 20mA at 5000V) with short-circuit current exceeding 40mA.
4. The high-voltage generation module employs fully enclosed technology with internal protective resistors, ensuring safety and reliability.
5. Strong anti-interference capability, suitable for operation in ultra-high-voltage substation environments.
6. Automatically discharges after testing concludes, with real-time monitoring of the discharge process.
Technical Parameters
Accuracy: ±10%
Measurement range: 0.1MΩ to 100GΩ
Test voltage: 5000V
Short-circuit current: >20mA
Measurement time: 1 minute to 10 minutes (depending on measurement method)
Voltage Level:2.5kV (2500V), 5kV (5000V)
Power supply: 180 to 270 VAC, 50 Hz/60 Hz ±1% (mains or generator supply)
Operating environment: Temperature -10 to 40°C, relative humidity 20 to 80%.
Weight:5kg
Maintenance & FAQs
Q: How to clean the tester's casing?
A: First, use a soft dry cloth to gently wipe the surface, removing dust and dirt. If the casing is very dirty, dampen the cloth with a little water or neutral cleaner for wiping, but avoid liquid entering the tester to prevent short circuits or damage. Air - dry the tester in a well - ventilated area after cleaning.
Q: How to handle stains or fingerprints on the LCD screen?
A: The LCD screen is a vital component. Use a dedicated LCD cleaning paper or soft microfiber cloth to gently wipe the screen, removing stains and fingerprints. Avoid using cleaners with alcohol or ammonia, as they can damage the screen coating and affect display quality.
Q: How to store the tester when not in use for a long time?
A: If the tester won't be used for an extended period, store it in a dry, ventilated, corrosion - free environment, preferably in its original packaging or a dedicated instrument case, avoiding pressure and impacts. Regularly power on the tester for inspection, ideally every three months for at least 30 minutes, to maintain the performance of internal electronic components and prevent faults from long - term idleness.
Q: What impact does the storage environment have on the tester?
A: Temperature, humidity, and air quality of the storage environment all affect the tester. High temperatures can accelerate internal component aging, high humidity can cause circuit board damp short circuits, and corrosive gases can damage metal parts and electronic components. Choose a suitable storage environment as required to extend the tester's lifespan.
Q: How to prolong battery life when using battery power?
A: For battery - powered testers, avoid overcharging or deep discharging. Follow the manual's charging and discharging instructions. It's recommended to charge when the battery is around 20% and disconnect the power after full charge. Regularly perform full charge - discharge cycles, at least once a month, to maintain battery activity and performance.
What to note when using an external power adapter?
Ensure the adapter's output voltage and current match the tester's requirements to prevent damage from instability. When connecting or disconnecting the adapter, turn off the tester first to avoid spark damage.
Q: How to ensure the tester's measurement accuracy?
A: Regularly calibrate the tester, at least once a year, by professional metrology institutions or authorized repair centers. Avoid severe shocks and follow the manual's usage and maintenance guidelines to prolong accuracy retention.
Q: What to do if measurement results show deviations?
A: First, check the tester's settings, including range and test mode. Then perform a self - calibration as per the manual. If deviations persist, contact the manufacturer or a professional technician for repair and calibration, avoiding self - disassembly.
Q: How to troubleshoot if the tester won't power on?
A: First, check power connections, including the adapter and battery status. If connections are correct, try pressing the reset button. If it still won't power on, there may be an internal power circuit or motherboard fault, requiring professional repair.
Q: How to handle abnormal data during measurement?
A: First, check if the test leads are securely connected and if the test item is normal. Then remeasure. If abnormal data persists, the measurement module may be faulty, and the tester should be sent to a professional repair point.
