Portable Fiber Tester OTDR with 16km Range and 600 mA Current – GAOTek

Additional Information

1. Test Fiber Link

The Procedures are as follows:

• Firstly, please make sure that the battery is installed well or the power adapter has been inserted; there is no light is injected into the fiber; press button for 3s to switch on the tester.
• Choose the test wavelength.
• Set test mode and testing parameters.
• Clean the fiber; clean the connectors; clean fiber adapters; and check the adapter is FC/PC type.
• Connect the fiber with the OTDR output port.
• Press button to gain the waveform.
• After the test is finished, the tester will list the events automatically according to the set event threshold.

The test result can be checked from the event list when the curve analysis is completed.

Caution: Before testing, please make sure there is no operating light in the optical fiber, otherwise the measurement result will be inaccurate or even result in the permanent damage of the instrument, The dimension of the fiber is very tiny, so, even a very small dirty on the fiber connector, can affect the accuracy of the test result. So, please clean the fiber connector, as well as the interface before testing.

The optical fiber connector can be cleaned with ordinary industrial alcohol and the cleaning cotton swabs (standard accessories).Stretch a cleaning cotton swab with industrial alcohol into the port of an optical fiber connector, turn it gently and repeat the operation with another clean and dry cleaning cotton swab.

2. Testing mode and parameter

• Press or touches【Menu】to enter the menu.
• Press to move the cursor to the “Parameter set”
• Press【 OK 】button or touch to confirm to enter the interface of parameter setting

2.1 Set testing range

Usually, the corresponding predefined range in the setup of distance range is chosen in line with the actual optical fiber length to guarantee high measurement accuracy.

Please operate as follows

• Please touch or press button and move the cursor to the “distance range”, and press to switch to the parameter, then press 【OK】to enter to pop up a pull-down menu.
• Touch or press and to choose the item to be set, and press 【OK】to confirm the parameter to be set.

2.2 Set Pulse width

The pulse width has an impact on the dynamic range and the resolution of the measured trace. If a narrower pulse width is chosen, a higher range resolution and a smaller dead zone will be realized, but the dynamic range will have a loss; if a wider pulse width is chosen, a larger dynamic range and a longer optical fiber length will be realized, but the range resolution and the dead zone parameter will be both affected.

The “Setup of the Pulse Width” option has 10 predefined items in all:10ns, 20ns, 50ns, 100ns, 200ns, 500ns, 1000ns, 5us, 10us, 20us. The setup is valid in the manual measurement mode only. Please operate as follows:

• Press or touches  to switch to the “Pulse width” option and 2 to switch to the parameter.
• Press【OK】, a pull-down box menu of range will pop up after that. Touch or press to choose the item to be set, and click【OK】 to confirm the item to be set.

2.3 Set Average time

The average time has a direct effect on the signal-to-noise ratio of the measured trace. A larger time corresponds to a longer measuring duration, a higher signal-to noise ratio and larger dynamic range. Thus, choose the maximum average time as much as possible when measuring a long optical fiber or viewing a remote event.

The operation methods is the same as that in 2.1

2.4 Set Laser wavelength

Choose the wavelength of OTDR, and 1310 nm and 1550 nm are optional. The factory default of laser length is 1550 nm.

The operation method is the same as that in 2.1.

2.5 Set Measuring mode

The optional modes are Average mode and Real-time mode. Under the real time mode, the OTDR can measure the connectivity of the optical fiber and update the testing curse in real time. And the testing will not stop unless you press to stop the testing; Under the Average mode, based on the average time to be set, the instrument will accumulate and average the testing data, when the testing time is longer than the predefined time, the testing stopped.

2.6 Set Index of reflection

The index of the optical fiber influences the transmission speed of the laser in the optical fiber. So an accurate index of reflection can affect all of the OTDR testing referring to distance, such as the location of event, attenuation, section length and the total length. Generally speaking, the index of reflection is provided by the manufacturer of the optical fiber. We provide a default index of reflection for each wavelength. And user can set according to their need, and please check the parameter before each testing. It can be set to be any value between 1.0 and 2.0 and correct to four decimal places. Its factory default is 1.4666.

Please operate as follows:

Touch or press to switch to the “Index of Reflection” option to switch to the parameter value, press【OK】to pop up the Edit of Index of reflection.

Touch soft keyboard directly or press move curser to the software, press 【OK】to edit the value or “ ”to delete the value. Finally, touch “save” directly or move the curser to “save”, and then touch 【OK】 to confirm the setting.

2.7 Set Scattering coefficient

The Scattering coefficient is used to show the backscattering amount of specific optical fiber. And the scattering coefficient is used to calculate the event loss and reflectivity. And the scattering coefficient is provided by the manufacturer of the optical fiber. And the default is 60.50 db, and the customer can modify according to their needs.

The operation method is same as that 2.6

2.8 Non-Reflection Threshold

Setup of the non-reflection threshold has a direct bearing on the existence of the insertion loss events in the event list. The loss events equal to or larger than the threshold are listed in the event list. It is 0.20 dB by default.

The operation method is same as that in 2.6

2.9 Reflection Threshold

Setup of reflection threshold: It has a direct bearing on the existence of reflection events in the event list. Only the events with a reflection value equal to or larger than the threshold are listed in the event list. It is 60.50 dB by default.

The operation methods is same as that in 2.6

2.10 Ending Threshold

Set up the minimum value of ending event, it is used to judge the end of the optical fiber, and it is 3 dB by default.

And the operation method is same as 2.6.

2.11 Restore the defaults

Restore parameters of the OTDR to factory default.

3. File operation

3.1 Save testing result

Press or touch【Menu】to enter the menu. Touch 【Save】or press【 】 and 【 】to choose the items to be set, press【OK】to switch to the file save.

The file folder would be named as the current date automatically, and the user can press“ ”to delete the name of the file and modify it according to the actual need.

The operation method is same as that 2.6.

3.2 File system

File system includes Open, Saved As, Delete and Format. Enter it through the “File” submenu under “menu”.

3.2.1 Open

Open a file folder

• Firstly, enter the first-lever directory, please see the following picture.
• Touch or press【 】and【 】to choose the file folder;
• Press【OK】to enter the second level directory, or press 【ESC】or Cancel to exit from the file system.

Open a file

• Touch or press【 】or【 】to choose the file to be opened
• Press【OK】to open the file, or press【ESC】or Cancel to exit from the file system.

3.2.2 Saved As

The operation method is same as 3.1.

3.2.3 Delete

Delete a file folder

• Press【 】and【 】to move the curse to the file folder to be deleted, press【A-B】for choosing. (It can delete multi- file folders at the same time).
• Touch “Delete” or move curser to the “Delete”, press “OK”

Delete a file

• Touch or press【 】and【 】to move the curse to the file to be delete, press 【A-B】for choosing. (It can delete multi files at the same time).
• Touch “Delete” or move curser to the “Delete”, press “OK”

Standard Accessories