NF-889T is easy and fast to find the fault wire among a large amount of wires. It can directly check the network wire order on the status of switchboard ON and can take the place of the network tester. It can check the open circuit, short circuit , break circuit and wire cross. The result is very correct and shows clearly and directly.
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| The max working current | Emitter<=10mA |
| Receiver<=30mA | |
| Signal transmission format | Multi-frequency impulse |
| Signal output electric status | 8Vp-p |
| Distance of signal transmission | >=3km |
| Volume Regulate Function | Yes |
| Earphone for noise environment | Yes |
| Sensitive | induction distance less than 20 mm, strong anti-jamming ability |
| Storage Temperature | -20 to 50C |
| Operation Temperature | -10 to 40C |
| Battery | DC 9V terrace battery |
| Battery life time | >50hrs continuous use |