3. Specifications
◆ DC V test
Range: 0～260V, Error: ±5％
◆ Insulation impedance test
Range: 0~10MΩ, Error: ≤±5％±0.1 MΩ
Range: 10~30MΩ, Error: ≤±10％ ±0.5MΩ
◆ AC voltage test function
◆ Ring distance ≤ 1Km
◆ Open resolution ≤ 2Km
◆ Monitoring resistance ≥1MΩ
◆ DTMF applying to GB/T15279
◆ CID function, FSK/DTMF compatibility
◆ Telephone number dial and display function
◆ Mute function
◆ P/T transfer function
◆ High voltage indication
◆ Checking wire pairs function
◆ Battery: rechargeable 9V NI-MH battery
4. Dimension & weight
◆ Dimension（mm）: 232×73×95
◆ Weight （kg）: 0.5
5. Operation environment
◆ Environment temperature: -10℃~55℃
◆ Relative humidity: 10%~95%
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