ST230F Telephone Line Tester is one portable and intelligent line fault tester, which adopts advanced technologies such as intelligent CPU, IC & surface mounted technology (SMT) technology. It integrates various kinds of functions such as telephone, line performance test and safety test to be the one. The caller telephone number display function is compatible with FSK/DTMF two types. Its particular function of automatically detecting high AC voltage test can test whether there is dangerous high AC voltage in the line or not quickly and accurately in order to protect lineman from high voltage. The tester is designed following the human engineering theory with the appearance style like barbell, it can be put on the shoulder, the lineman can do other work using hands at the same time; besides, it can be hung in the tool belt of waist through the pothook, it is convenient to realize the talk function cooperating with the high quality earphone when the lineman is climbing or doing other things; the max continuous working duration when the inside rechargeable Ni-MH battery is fully charged is about 7 hours without replacing battery; the shell is made of new material and it is very reliable.Main Functions and Specificationsu DC V testRange: 0～260V，Error: ±5ï¼…u Insulation impedance test Range: 0.1~10MΩ, Error: ≤±5ï¼…±0.1 MΩRange: 10~30MΩ, Error: ≤±10ï¼…±0.5MΩu Induction voltage functionu Ring distance ≤ 2Kmu Open line resolution ≤ 2Kmu Monitoring resistance ≥1MΩu Caller telephone number display, FSK/DTMF auto compatibility u DTMF applying to GB/T15279-94u Dialing number displayu Hands free (louder speaker) function, which can free your hands to do other operations.u Telephone number storage and dial functionu Data lockout override functionu Mute functionu P/T transfer functionu ADSL/ISDN identificationuHigh voltage indicationu Checking wire pairs function as the cable trackeru Battery: rechargeable 9V NI-MH batteryDimension & WeightuDimension（mm）: 232×73×95uWeight （kg）: 0.5 Operation environmentuEnvironment temperature: -10℃~55℃uRelative humidity: 10%~95%uEnvironment noise: ≤60dBuAtmospheric pressure: 86~106Kpa
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