Joinwit Manuals & User Guides

About Joinwit

Joinwit Optoelectronic Technical Co., Ltd, established in 1998, is a leading manufacturer specializing in optical test and measurement equipment. Their product line includes fiber optic identifiers, power meters, visual fault locators (VFL), mini OTDRs, and other passive components essential for fiber optic network construction and maintenance.

With a focus on high performance and reliability, Joinwit equips network technicians with robust tools for testing, troubleshooting, and verifying fiber link capabilities.

• How do I read the optical power on my Joinwit power meter?

  Turn on the device, select the corresponding wavelength (e.g., 1310nm/1550nm) based on your network, and insert the fiber connector firmly into the optical interface. The screen will display the real-time optical power value in dBm.

• What should I do if my Joinwit fiber identifier shows inaccurate readings?

  Ensure you have selected the correct test wavelength and properly cleaned the fiber connectors with alcohol. Also, check that the fiber adapter metal clamp sits properly for the correct fiber size (250um, 900um, 2mm, or 3mm).

• How do I use the VFL function on a Joinwit tester?

  Insert the fiber link into the VFL red light source port and press the VFL button. The first press provides continuous output, a second press makes it flash at 1Hz, and a third press turns it off.

• What is the standard warranty on Joinwit testing instruments?

  Joinwit instruments typically come with an eighteen-month warranty from the date of shipment, covering production defects during normal use. Do not open the instrument case without permission, as this may void the warranty.