ST220B is a compact telephone line tester combining basic line tester function, auto ring, calling subscriber, checking line pair and high voltage protection. It is rather a good portable, handheld tester to the lineman. Main Functions ● Telephone functions (Dial, redial, talk and hook) ● Fault tests (Insulation test, line break test and earthing test) ● Checking wire pairs ● Call subscriber & talk ● Pulse/Tone dialing ● Low battery check. Key Features● DTMF applying to GB/T15279-94 ● High voltage alarm ● Low voltage check● Last number redial ● Special durable test clamp ● Automatic power off and energy-save design ● Pocket size, simple operation Technical SpecificationsInsulation resistance test Range (MΩ) 0~10 General specificationsRing distance (Km) ≤1 Line break resolution (Km) ≤3 Weight (kg) ≤0.22 Dimension (mm) :146×54×37 Battery (V): 9
This Telephone Line Testeris a portable and intelligent line fault tester which is designed following human engineering theory with the appearance style like barbell, adopting advanced technologies su
ST230B Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a Telephone, it also has functions of high voltage protection,
ST230C Telephone Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the basic functions as a common Tel Line Tester, it has functions of high voltag
ST230D Telephone Line Tester is a new kind of line fault tester with safety &multi-functions capabilities. Besides the basic functions as a common Tel Line Tester, it also has functions of high vo
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