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Mini Optical Time Domain Reflectometer

TekRanger® 2 TFS3031

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TekRanger® 2 TFS3031

Features & Benefits

  • One-button Fully Automatic IntelliTrace Fiber Analysis
  • Singlemode Distance and Loss Measurements Traceable to NIST
  • Large, Backlit, High-resolution Display
  • Keyboard Port and Optional Mini-keyboard
  • RS-232 and Parallel Ports for Printing and PC Access
  • Shock, Water and Dust Resistant
  • Auto Echo Detection
  • Selectable Splice Loss and Reflectance Thresholds
  • Files are Compatible with FiberMaster™ OTDR, TARGET1™, PC Spreadsheets
  • Context Sensitive Help


  • Installation and Acceptance Testing of Fiber Optic Networks
  • Fiber Optic System Maintenance Testing
  • Locating Optical Cable Faults During Restoration
  • Optical System Documentation

TekRanger 2 TFS3031

If your job is to install, maintain or restore optical fiber, the TekRanger 2 TFS3031 mini-OTDR with IntelliTrace™ Automated Fiber Analysis System is a rugged, easy-to-use, mini-optical time domain reflectometer (OTDR) that's built for you. It's designed to stand the rigors of field work, while providing precise measurements on singlemode optical fiber systems in an economical form factor.

The IntelliTrace System Advantage

IntelliTrace technology automatically adjusts and optimizes test parameters so you don't have to. Just press the Start/Stop button and it will provide the best possible resolution, while maximizing dynamic range to give you the most accurate measurements available in a mini-OTDR today. One IntelliTraceFilter acquisition provides consistent, repeatable and accurate results. The location, reflectance and loss of every splice appears quickly and clearly on the large, high-contrast display.

The TFS3031 is the only mini-OTDR that can locate an event at 10 meters while also finding an end at 70 km away with the push of a single button. No need for multiple acquisitions to get a complete picture of your fiber, either with a displayed trace or an event table. You get greater productivity in labor with less training.

Traceable Measurements

The TekRanger 2 TFS3031 offers traceability on distance and loss measurements. This means that both the hardware and the software are included in our accuracy specifications. What this means to you is that you can count on the TFS3031 mini-OTDR to provide the most reliable and repeatable measurements of any OTDR in the world.

Convenient Data Storage

Test results can be stored in the TFS3031's ample internal memory or collected on the optional floppy disk drive. Microsoft Windows based TARGET1 software package gives you virtually unlimited flexibility when analyzing and documenting your spliced fibers.

Easy System Software Updates

The TFS3031's optional disk drive and RS-232 port permit updating of the unit's firmware in the field so you can easily keep up with the latest technology. 



1310 nm ±20 nm, singlemode.

1550 nm ±20 nm, singlemode.

Dynamic Range*1


Dynamic Range

1310/1550 nm (Opt. 06)

30/28 dB

Readout Resolution -

25 cm minimum.

Loss threshold: 0.02 dB.

Loss resolution: 0.001 dB.


Distance Measurements - Meters, feet, miles.

OTDR Distance Range Settings - Singlemode: 1 to 240 km.

Distance Resolution (IntelliTrace™) - 1.25 m to 40 m.

Hardware Scale Accuracy*3 -

Horizontal Time Base: ±1.25 m ±1.25 m ± 10-5 x distance.

Vertical Linearity: 0.02 dB/dB.


System Measurement Accuracy*4 -

Distance: ±4 m.

Loss: ±0.01 dB.


Reflectance Accuracy - Exceeds Bellcore GR-196-CORE*2.

Measurement Time (Auto) - Less than 3 minutes (20 dB loss).

Dead Zone*2



Loss Measurement


5 m

15 m

Display - High resolution 640 x 480; 7.2 in., high contrast; operator switchable backlight.

Selectable Pulse Widths - 1 m, 5 m, 10 m, 20 m, 50 m, 100 m, 200 m, 500 m, 1000 m, 2000 m.

Memory Capacity -

100 traces in internal memory (typical).

3.5 in. floppy disk drive (optional).


Output Ports - RS-232 serial; Centronics parallel printer, mini-DIN (keyboard).

Power Options - AC (100 to 240 V, 50 to 60 Hz). DC Operation: 9 to 16 VDC. Internal NiCad rechargeable battery (4 hours of operation depending on operating mode).

Laser Safety -

Class 1 per 21 CFR 1040.

Class 1 per CEI/IEC 825-1: 1993.

Options 3T, 4T and 7T are Class 1.

Option 6T is Class 2.


Environmental (without internal disk drive)

Temperature Range -

Operating: -10 °C to +40 °C.

Nonoperating: -20 °C to +60 °C.


Storage Temperature - -20 °C to +60 °C.

Relative Humidity - 5% to 95% (noncondensing).

Field Usage*2 - Shock, water and dust resistant.

Shock*2 - 30 in. drop.

Safety - UL 3111-1, CSA 1010.1.

Physical Characteristics



















*1 Typical performance @ 25 °C.

*2 Per Bellcore GR-196-CORE.

*3 Excludes uncertainty in fiber IR and cabling factor.

*4 Verified on NIST traceable calibration system, singlemode options only.

Ordering Information


TekRanger 2 Base Unit.

Includes: Operator Manual (070-9027-06); Quick Reference Card (063-2096-02); NiCad Battery Pack (146-0112-00); Power/Charger Adapter (119-4545-01); Power Cord; Soft Carrying Case (016-1215-02). Please specify power plug and manual version when ordering.

Output Port Option*1

Singlemode Option (ITU-T G.652) -

Opt. 06: Dual wavelength 1310/1550 nm.


Connector Options*2

Singlemode Option

Connector Type

Part Number






















Power Plug Options

Opt. A0 - US Plug, 115 V, 60 Hz.

Opt. A1 - Euro Plug, 220 V, 50 Hz.

Opt. A2 - UK Plug, 240 V, 50 Hz.

Opt. A3 - Australian Plug, 240 V, 50 Hz.

Opt. A4 - N. American Plug, 240 V, 50 Hz.

Opt. A5 - Swiss Plug, 220 V, 50 Hz.

Opt. A6 - Japanese Plug, 100 V, 110/120 Volt, 60 Hz.

SeePower Sources page for additional description.

Language Options

Includes: Alternate language instrument interface and User Manual. All language options can also be run in English.

Opt. L0 - U.S. English.

Opt. L1 - French.

Opt. L2 - Italian.

Opt. L3 - German.

Opt. L4 - Spanish.

Opt. L5 - Japanese.

Opt. L6 - Portuguese.

Opt. L7 - Simple Chinese.

Opt. L8 - Standard Chinese.

Opt. LF - Finnish.

Opt. LD - Dutch.


Opt. C3 - Calibration Service 3 Years.

Opt. C5 - Calibration Service 5 Years.

Opt. D1 - Calibration Data Report.

Opt. D3 - Calibration Data Report 3 Years (with Option C3).

Opt. D5 - Calibration Data Report 5 Years (with Option C5).

Opt. R3 - Repair Service 3 Years.

Opt. R5 - Repair Service 5 Years.

Optional Accessories

Opt. 11 - 3.5 in. Disk Drive.

Opt. 19 - Mini-keyboard (118-9402-00).

Opt. 1D - Test Data Sheet.

Opt. 1S - PC Analysis Software (TARGET1).

Opt. 1T - Hard Transit Case (016-1210-00).

Opt. 3T*4 - Optical Laser Source, singlemode 1310 nm reference source (TOP140).

Opt. 5T - Optical Power Meter 850/1310/1550 nm (TOP200).

Opt. 6T - Visual Fault Finder 635 nm (TOP300).

Opt. 7T*4 - Optical Laser Source, singlemode 1310/1550 nm reference source (TOP160).

Opt. 8T*4 - High Power Optical Power Meter 980/1310/1550 nm (TOP220).

Opt. 9T*4 - Adjustable Optical Attenuator, singlemode 0-35 dB (TOP400).

Hard Travel Case - Order 016-1210-00.

RS-232 PC Interface Cable - Order 012-1379-00.

TARGET1™ Analysis Software - Order TARGET1.

Cigarette Lighter Power Adapter - Order 198-5810-00.

Centronics Parallel Printer Cable - Order 012-1214-00.

Module Level Service Manual - Order 070-9026-04.

*1 An OTDR must have at least one OTDR Port.

*2 One connector option at no charge per OTDR port option. Order additional connectors using the 119- part number.

*3 Eight degree angled-PC connector. Cannot mix APC and PC connectors on the same optical port.

*4 Will have same connector as singlemode port.