LISUN LEDLM-84PL/LEDLM-80PL LED Optical Aging Test Instrument – After-sales Frequently Asked Questions (FAQ)

LEDLM-80PL LED Lumen Maintenance and Aging Life Test System is designed according to IES-LM-80 and TM-21, it used to test & record the optical and electrical Maintenance for single LED or LED module, the software is based on Arrhenius model and TM-21 to calculate the LED life. The LEDLM-80PL needs to work with a GDJW/GW Series High Temperature Chamber and and DC12010 DC Power Source.

LEDLM-84PL LED Lumen Maintenance and Aging Life Test System is designed according to IES LM-84 and TM-28, it used to test & record the optical and electrical Maintenance for LED luminaires, the software is based on Arrhenius model and TM-28 to calculate the LED life. The LEDLM-84PL needs to work with a GDJW/GW Series High Temperature Chamber and and LSP-1KVARC AC Power Source.

LED has the feature of long life, but its life will be different with the different working condition and driver current. Generally the life will be around 50K hours. Different from the traditional lightsource, LED light will decay gradually rather than extinguish instantly. 
1) L70 (hour): time to 70% lumen maintenance
2) L50 (hour): time to 50% lumen maintenance

LEDLM 80PL LED Optical Aging Test Instrument

Q1: Communication error during software testing
A1: ①The system is connected to the computer via RS485 communication cable, RS485 communication box and USB cable. You need to install the driver of RS485 communication box. Then you can see the corresponding communication port in the computer hardware management:

LM-84/LM-80 com ports

Note: Some computers may change the communication port number automatically after restarting.
②Then in the system settings, select all the models according to the hardware you purchased, and click “Auto search for port”. (Note: The following figure is only an example, your models may be different). If there is an error message, the prompt message will indicate which model has communication errors, and then check the connection of the RS485 communication line of it. The product SN (serial number), Port (communication port), and address are all obtained automatically.

Search for the com ports of the devices

Q2: How to set the total test duration and sampling interval?
See the sixth item in the figure below, “Data collection points”. The unit is hours, and the largest number is the total test duration. You can modify, add or subtract numbers freely, but you must follow the following rules:
① Numbers must be arranged from small to large.
② Two adjacent numbers are separated by commas.
Note: Regardless of the total test duration, the software will give the final calculation result. The longer the test time, the more accurate the result given by the software.

Set the aging test duration

Lisun Instruments Limited was found by LISUN GROUP in 2003. LISUN quality system has been strictly certified by ISO9001:2015. As a CIE Membership, LISUN products are designed based on CIE, IEC and other international or national standards. All products passed CE certificate and authenticated by the third party lab.

Our main products are Goniophotometer, Integrating Sphere, Spectroradiometer, Surge Generator, ESD Simulator Guns, EMI Receiver, EMC Test Equipment, Electrical Safety Tester, Environmental Chamber, Temperature Chamber, Climate Chamber, Thermal Chamber, Salt Spray Test, Dust Test Chamber, Waterproof Test, RoHS Test (EDXRF), Glow Wire Test and Needle Flame Test.

Please feel free to contact us if you need any support.
Tech Dep: Service@Lisungroup.com, Cell/WhatsApp:+8615317907381
Sales Dep: Sales@Lisungroup.com, Cell/WhatsApp:+8618117273997