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Common problem

Maintenance and calibration

Frequently Asked Questions

1. OPWILL test instruments, whether in the shutdown can be charged? Are there charging indicator?

 

Answer: Yes, OPWILL test instruments can be charged under the shutdown. The power light flashing indicates charging, and steady indicates that the battery is fully charged.

 

2. Touch screen is insensitive

 

The reason:  Touch screen need to be calibrated

 

The solution: Refer to the manual to calibrate the touch screen

 

3. About remote control: via the Ethernet port instrument PC cannot remotely connected instrument

 

The reasons:

 

A. Network cable is damaged or bad contact.

 

B. Instrument IP and computer IP are not on the same network segment.

 

C. Instrument is not enabled remote connections

 

D. Port and instrument settings are inconsistent when PC Connects with IP

 

The solutions:

 

A. Make sure the cable good

 

B. Make sure instrument IP and computer IP been in the same network segment

 

C. Make sure instrument enabled remote connections

 

D. Make sure port and instrument setting the same when the computer connects with IP.

 

4. On your computer, remote Desktop or other off-line analysis software will not run properly after installation

 

The reason: Lack of relevant library files

 

The solution: Please install the relevant library files from the supplied CD-ROM

 

5. OTDR meter, cannot test fiber curve

 

The reason: OTDR optical interface connector or the tested fiber optic connectors are dirty

 

The solution: OTDR with a clean optical port / fiber optic connectors

 

6. A large error of the distance tested by OTDR meter

 

The reasons: A. Test parameter setting wrong. For example: fiber refractive index

 

             B. OTDR optical interface connector or the tested fiber optic connectors are dirty

 

The solutions: A. Adjusting the refractive index according to the optical fiber ( refractive index have 0.01 deviation, which can cause 7m test error of 1km fiber optic)

 

               B. Clean the optical port / fiber optic connectors

 

7. OTDR cannot be seen all links (Tracks and events are drowned in the noise)

 

The reasons: A. Setting wrong of the test parameters leading the insufficient of dynamic range. For example: The pulse width is too small 

 

             B. The dirt of the OTDR optical interface connector or the measured fiber leads lack of effective dynamic range

 

The solutions: A. Choose a larger pulse width and longer sampling times

 

               B. Clean the OTDR optical interface connector or optical fibre splice 

 

8. How to reduce the impact of “ghosting” on the OTDR testing?

 

A. Reduce the test pulse width.

 

B. When conditions permit, minimize the factors that cause the formation of reflective events in the link ( It should minimize the reflection intensity of the connector parts when using mechanical connection).

 

9. The insertion loss of OTDR test is sometimes too large, sometimes too small, and sometimes the "pseudo-Gain"

 

The reason: Scattering coefficient are different before and after the connection Points.

 

The solutions: Take bidirectional measurements, add the insertion loss of the same point, and then get the average of the sum.

 

10. During the test, displaying a message on the the application indicating that a "load signal and fiber error"

 

The main reasons: there is optical signal when OTDR port detect to the fiber link

 

The solution: Disconnected the fiber from the OTDR port. Press "Cancel" button to close the message and stop the test. Test again when exclude optical signal light on the link.

 

11. Gigabit Ethernet Analyzer, testing the optical port , one end shows “Link”, and the other end is not “Link”

 

The main reason: Port configurations are not the same at both ends of the interconnection. For example, the rate of one is gigabit, while the other is 100 Mbit; One is open of auto-negotiation, while the other is closed of auto-negotiation.

 

The solution: Modify the configuration of one end to ensure consistent configuration of port parameters at both ends 

 

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