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HF-GT-216 Medical Ground Resistance Tester
This Medical Ground Resistance Tester complies with IEC 60601-1 medical standards. It adopts four-terminal measurement to accurately check earthing resistance of medical devices, featuring adjustable current, alarm function and stable performance for hospital safety tests.
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Product Introduction
HF-GT-216 Medical Earth Resistance Tester is used to measure the internal earthing resistance of electrical equipment, which refers to the contact resistance between the main earthing terminals of electrical devices. It is mainly applied to earth resistance testing of medical electrical equipment and complies with GB9706.1-2020 (IEC60601-1: 2012) medical standards.
Application Scope
- Medical devices: Various new medical instruments and supporting equipment, cardiac monitors, medical imaging devices, biochemical analyzers, sphygmomanometers, clinical thermometers and other household medical appliances
- Diagnostic and therapeutic equipment: X-ray diagnostic devices, ultrasonic diagnostic equipment, nuclear medicine devices, endoscope systems, ENT therapeutic instruments, low-temperature refrigeration equipment, dialysis treatment equipment, first-aid supplies
- Ward nursing equipment and appliances: Hospital beds, cabinets, surgical chairs, medical beds, etc.
- Auxiliary equipment: Medical nursing data and image processing equipment, rehabilitation aids and special appliances for the disabled
- Dental medical equipment: Dental diagnostic devices, dental surgical instruments, dental laboratory equipment
- Medical nuclear magnetic resonance equipment
Performance Features
- Testing time, test current and earthing resistance can be displayed simultaneously
- The leakage alarm resistance value can be continuously preset to facilitate testing operations
- Adopts four-terminal measurement method to eliminate the influence of contact resistance and realize high measurement accuracy
- Added open-circuit alarm selection function; users can decide whether to activate the open-circuit alarm
- Divider circuit is applied for resistance display, which eliminates the impact of mains voltage fluctuation and reduces dependence on power supply quality
Technical Specifications
| Item | Parameter |
|---|---|
| Model | HF-GT-216 |
| Output Current | 5 ~ 30A±5% |
| Measuring Resistance Range | (10.0 ~ 199.9) mΩ / (200 ~ 600)mΩ |
| Measurement Accuracy | ±5% |
| Testing Time | 0.0s ~ 999s; 0.0 stands for continuous testing |
| PLC Interface | Optional |
| Power Supply | 220V±10% 50Hz±5% |
| Operating Environment | 0℃ ~ 40℃, ≤85%RH |
| Overall Dimensions | 320280180mm |
| Weight | 9.2Kg |
| Standard Accessories | Test leads, power cord |
| Optional Parts | PLC interface set, including RK00002 connecting cable and RK301 terminal box |
Operation Instructions for Medical Ground Resistance Tester
Preparatory Work
Place the tester on a flat, stable desktop. Connect the power cord to the AC 220V mains supply, and link the dedicated test leads between the instrument terminals and the ground terminals of the medical device to be tested correctly. Check all wiring to avoid loose connections or short circuits.
Parameter Setting
Switch on the device power. Set the output test current within the range of 5~30A as required. Preset the leakage ground resistance alarm threshold according to medical safety specifications. Enable or disable the open-circuit alarm function based on test demands, and set the testing duration (select continuous testing by setting the time to 0.0s if needed).
Start Formal Measurement
Press the test start key. The screen will synchronously display real-time test current, elapsed testing time and measured ground resistance value. The four-terminal measurement structure automatically eliminates contact resistance errors to guarantee accurate readings.
Alarm Judgment & Result Recording
Once the measured resistance exceeds the preset alarm limit, the tester will trigger an audible and visual alarm to remind operators of unqualified grounding conditions. Record all test data for inspection archives.
Post-test Shutdown Steps
After finishing all tests, stop the testing output first, cut off the instrument power supply, disconnect the test wires and power cable, then tidy up all accessories for proper storage.
Notes
Operate in an environment of 0℃~40℃ with humidity ≤85%RH. Do not conduct testing under damp or corrosive surroundings. The optional PLC interface can be connected to upper computers for automatic data acquisition if required.
FAQ for Medical Ground Resistance Tester
Q1: What standard does this medical ground resistance tester comply with?
A: It fully conforms to GB9706.1-2020 and IEC60601-1:2012 international medical electrical equipment safety standards, specially designed for medical industry grounding safety tests.
Q2: What is the principle of four-terminal measurement adopted by the device? What benefits does it bring?
A: The four-wire testing method separates current loop and voltage sampling loop. It can completely exclude the interference of wire and contact resistance, greatly improving measurement accuracy for tiny grounding resistance.
Q3: What output current range is available for testing? Can I adjust it freely?
A: The adjustable output current is 5~30A with tolerance ±5%. Users can set proper current values according to different medical device testing requirements.
Q4: How to set the testing time? What does 0.0s mean?
A: Testing time ranges from 0.0s to 999s. When set to 0.0s, the instrument works in continuous testing mode without automatic stop.
Q5: What will happen if the measured grounding resistance exceeds the preset alarm value?
A: The tester will activate sound and light leakage alarm promptly to notify operators that the medical equipment grounding condition is unqualified. The alarm threshold can be continuously adjusted in advance.
Q6: Can I turn on or off the open-circuit alarm function?
A: Yes. The open-circuit alarm function is optional. Users can enable or disable this reminding function according to actual testing scenarios.
Q7: Why can the instrument resist mains voltage fluctuation?
A: It is equipped with divider arithmetic circuit for resistance display, which offsets the influence of grid voltage swings, lowering dependence on power supply stability.
Q8: Is PLC communication interface standard equipped? What is its use?
A: The PLC interface is optional. After assembly, it can connect to upper control systems to realize automatic data transmission, unmanned testing and batch data recording for production lines.
Q9: What working environment is suitable for the tester?
A: Ambient temperature: 0℃ ~ 40℃; Relative humidity: ≤85%RH, no condensation, corrosive gas or conductive dust is allowed.
Q10: What accessories are included in standard delivery? What optional parts can be purchased additionally?
A: Standard accessories: test leads and power cord. Optional parts: PLC interface kit, RK00002 connecting cable, RK301 terminal box.
Q11: What resistance ranges can this instrument measure?
A: Two measuring ranges: 10.0~199.9mΩ and 200~600mΩ, suitable for all kinds of medical equipment grounding resistance detection.
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