Insulation tester ST220

impedancesafetycable

telephone line tester is the button phone and lineman tester which help lineman to check the cable fault. ST220B Tel Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a common Tel Line Tester, it also has the functions of high voltage protection and dangerous voltage warning, etc. Main Functions 1. Dialing, talk, hook 2. Checking wire pairs 3. Test insulation or break faults of the line 4. Pulse/Tone switch. Key Features 1. DTMF applying to GB/T15279-94 2. High voltage alarm 3. Low voltage warning 4. Last number redial 5. Special durable test clamp 6. Automatic power off and energy-save design 7. Pocket size, simple operation Technical Specifications 1. Insulation impedance test 2.Range (MΩ)0~10 3. General specifications 4. Ring distance (Km)≤1 5. Line break resolution (Km)≤3 6. Weight (kg)≤0.22 7. Dimension (mm)146*54*37 8. Battery (V) 9 ST220B Tel Line Tester is a new kind of line fault tester with safety & multi-functions capabilities. Besides the functions as a common Tel Line Tester, it also has the functions of high voltage protection and dangerous voltage warning, etc.