UNI-T UT685B Manual
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UNI-T UT685B Manual

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UT685B/UT685B KIT
Contents
I. Overview ---------------------------------------------------------------------------------------- 3
II. Accessories ----------------------------------------------------------------------------------- 3
III. Safety Information -------------------------------------------------------------------------- 4
IV. Features --------------------------------------------------------------------------------------- 4
V. Display Features (UT685B) --------------------------------------------------------------- 5
VI.Testing Mode --------------------------------------------------------------------------------- 6
6.1 Testing Twisted-Pair Cabling --------------------------------------------------------- 6
6.2 Testing Coaxial Cabling --------------------------------------------------------------- 12
VII.POE Mode ---------------------------------------------------------------------------------- 14
VIII.Tone Mode --------------------------------------------------------------------------------- 15
8.1 Tone Mode Display ------------------------------------------------------------------- 15
8.2 UT683R Receiver (For UT685B KIT only) -------------------------------------- 16
9.1 Setting the NVP to a Specified Value -------------------------------------------- 18
9.2 Determining a Cable's Actual NVP ----------------------------------------------- 19
X. Backlight ------------------------------------------------------------------------------------ 19
XI. Unit of Length ------------------------------------------------------------------------------ 19
XII. Auto Power Off --------------------------------------------------------------------------- 19
XIII. Other functions -------------------------------------------------------------------------- 20
13.1 Low battery indication ------------------------------------------------------------- 20
13.2 Troubleshooting -------------------------------------------------------------------- 20
13.3 Specifications ----------------------------------------------------------------------- 20
XIV. Maintenance ----------------------------------------------------------------------------- 20
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Summary of Contents for UNI-T UT685B

  • Page 1: Table Of Contents

    VII.POE Mode ---------------------------------------------------------------------------------- 14 VIII.Tone Mode --------------------------------------------------------------------------------- 15 8.1 Tone Mode Display ------------------------------------------------------------------- 15 8.2 UT683R Receiver (For UT685B KIT only) -------------------------------------- 16 IX. Calibrating Length Measurements (Only for test mode) ------------------------- 18 9.1 Setting the NVP to a Specified Value -------------------------------------------- 18 9.2 Determining a Cable’s Actual NVP ----------------------------------------------- 19...

  • Page 2: Overview

    III. Safety Information To avoid fire, electric shock or personal injury, please follows: UT685B KIT is a handheld TDR cable tester, suitable for copper cables (CAT 5E、CAT 6、 Do not open the casing, there is no any user-serviceable part inside.

  • Page 3: Display Features (Ut685B)

    UT685B/UT685B KIT UT685B/UT685B KIT VI. Testing Mode V. Display Features (UT685B) 6.1 Testing Twisted-Pair Cabling 6.1.1 Cabling Test (1) Turn on the tester, and set the knob to "TEST", then press "PORT" to select RJ45 10 11 port. (2) Connect tester and wiremap adapter to the cabling, the test runs continuously until you change modes or turn the tester off.
  • Page 4 UT685B/UT685B KIT UT685B/UT685B KIT 6.1.2.4 Crossed Pairs 6.1.2.2 Short on Twisted Pair Cabling Figure 6.5 shows that 1, 2 and 3, 6 are crossed. The pin numbers flash to indicate the fault. Figure 6.3 shows a short between wires 5 and 6, the shorted wires flash to indicate the Detection of crossed wires requires a far-end adapter.
  • Page 5 UT685B/UT685B KIT UT685B/UT685B KIT 6.1.2.8 Voltage Detection 6.1.2.6 Ethernet Port Detected Figure 6.9 shows that the tester detects cable voltage. Figure 6.7 shows that the tester detects Ethernet port. If the measured cable is live and its voltage is greater than or equal to 10V, the tester The tester cannot measure the length if the port does not produce reflections.

  • Page 6: Testing Coaxial Cabling

    UT685B/UT685B KIT UT685B/UT685B KIT 6.1.2.11 Connecting to Telephone Networks in Bus Topologies 6.1.2.10 Connecting to Telephone Networks Wired in Star Topologies Telephone cables wired in a bust topology (Figure 6.12) connect the wall outlets in series. Telephone cables wired in a star topology (Figure 6.11) are connected together at a bridge In this topology, you measure the length from the last outlet to the wiremap adapter.
  • Page 7 UT685B/UT685B KIT UT685B/UT685B KIT 6.2.2 Typical Testing Results 6.2.2.4 Voltage on Coaxial Cabling Figure 6.17 shows that the symbol “ ” appears if the coaxial cable is live and its voltage 6.2.2.1 Results for a Good Coaxial Cable Figure 6.14 shows a good coaxial cable 63.2m and terminated with far-end adapter is greater than or equal to 10V.

  • Page 8: Viii.tone Mode

    8.1 Tone Mode Display 8.2.1 Features With the support of UT685B tester , UT683R receiver can achieve multiple functions such (1) Turn on the tester, then set the knob to “SCAN”. In tone mode, the default display is as locating and isolating cables by adjusting sensitivity, twisted-pair cable tracking, coaxial shown in Figure 8.1.a.

  • Page 9: Calibrating Length Measurements (Only For Test Mode)

    40V (AC), the receiver makes beep sound and the NCV indicator light flashes synchronously. (2) Set UT685B tester to “SCAN” mode, press “POR T” to select RJ45 port. Short press (2) Flashlight: Press the flashlight button to enable the flashlight function separately.

  • Page 10: Determining A Cable's Actual Nvp

    UT685B/UT685B KIT UT685B/UT685B KIT XIII. Other functions 9.2 Determining a Cable’s Actual NVP (1) Hold down “ ”, “ ” and “ ” at the same time to enter NVP setting mode. 13.1 Low battery indication (2) To set the NVP of coaxial port, please press “PORT.

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