TENMARS TM-903 Multimedia Cable Tester


The TM-903 Multimedia Cable Tester is a hand-held test instrument that lets you verify and troubleshoot the LAN cable of twisted pair.

It displays graph wire-map, opens, shorts, miss wires, split pairs and the remote ID number all on one screen.

Using multiple remote ID up to 8 locators to test on RJ-45 (UTP, STP) LAN cable, video coaxial cable and RJ11 voice cable.

Authorised Australian Distributor


PDF Cable Tester User Manual

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SKU: TENMARS TM-903 Categories: , Tags: ,

Product Description

– Detects opens, shorts, miss wires and split pairs on twisted pair cabling.
– Measures length. 
– Low battery detector.
– Auto backlit.
– Auto power off

Connector Types RJ-45, F-Connector and RJ11
Cable Category LAN cable (UTP, STP), video, coaxial cable and voice cable
Wire-Map Test Detects opens, shorts, miswires, split pairs
Length Test up to 255 meters (836 feet)
Length Resolution 0.1meter or foot
Length Units Meter and Foot
Accuracy ±10% + 1.0M (3ft)
Maximum Power (Operating) 20mA
Operating Temperature 5°C to 40°C, below 80% R.H.
Storage Temperature -10°C to 60°C, below 70% R.H.
Power 6 x 1.5V Type ‘AAA’ batteries
Battery Life Approx 200 times continuous testing
Dimensions 156mm (L) x 73mm (W) x 35mm (H)
Weight 170g approx.

2 Safety Precaution CAUTION Be extremely careful for the following conditions while measuring z Do not operate the meter under the environment with explosive gas (material), combustible gas (material) steam or filled with dust. z In order to avoid reading incorrect data, please replace the battery immediately when the symbol “ ” appears on the LCD. z In order to avoid the damage caused by contamination or static electricity, do not touch the circuit board before you take any adequate action. z Operating Environment: Indoors use. This instrument has been designed for being TM-901N/TM-902/TM-903 2 used in an environment of pollution degree 2. z Operation Altitude: Up to 2000M. z EMC: EN61326-1(2006), IEC 61000-4-2(2008, IEC 61000-4-3(2006) + (2007).

Weight 1 kg


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