LISUN LSG-6000 LM-79 Moving Detector Goniophotometer (Mirror Type C) – After Sales Questions and Answers

What is type C goniophotometer definition?

LSG-6000 Moving Detector Goniophotometer (Mirror Type C) was manufactured by LISUN completely meets LM-79-19, IES LM-80-08, COMMISSION DELEGATED REGULATION (EU) 2019/2015, CIE-121, CIE S025, SASO 2902, IS16106 and EN13032-1 clause 6.1.1.3 type 4 requirements. LSG-6000 is the latest upgraded product of LSG-5000 and LSG-3000 in compliance with the requirements of the LM-79-19 standard Clause 7.3.1, its an automatic light distribution intensity 3D curve testing system for measuring light. The measuring distance is from 5m to 30m.

What is the use of goniophotometer?

LSG-6000 gonio photometer manufacturer is LISUN, it can measure all types of lighting sources, LED, Plant Lighting or HID luminaires such as indoor and outdoor luminaires, roadway luminaires, street lamps, flood lights and other kinds of luminaires.

Q1: The power factor displayed in the electrical parameter table is negative.
A1: Please connect the wire A1 A2 on the back of the electrical parameter table by exchange.

Q2: (Try to use DC type electrical parameter meter) The DC voltage is negative.
A2: Swap the wiring V1 and V2 on the back of the electrical parameter meter.

Q3: The software cannot communicate.
A3: Confirm that the drive of the communication box is installed successfully.

Connect the other end of the USB cable to the black USB 2.0 port of the computer. Please try to use a desktop computer. USB is connected to the black USB2.0 port on the back of the host computer.

Q4: When the software is opened, it prompts “File is not a database”.
A4: Click the white button below to create a new database file and save it on the computer. Later test results will be automatically saved in this file. If the file is deleted or the location is moved, you need to reopen the database file or create a

Q5: The standard lamp cannot be lit.
A5: Confirm that the cabinet AC/DC switch is at the DC end.

Check and confirm that the filament of standard lamp is still intact.

The standard lamp is a constant current light source.
①Select DC power supply.
② Input the voltage and current value consistent with the standard lamp certificate, and select CC (constant current mode).
③ Illuminates.

If it still cannot be lit, there is a problem with the wiring. Please check the wiring according to the instruction manual.

Q6: In the angle control interface, when the far field gamma angle is rotated, the far field probe does not rotate with it.
A6: You need to check
① the synchronization axis in the figure below, and then rotate the Gamma axis through
②. Then the far field probe will also rotate along with the spindle of the distribution photometer.

Q7: The calibration distance is quite different from the actual distance.
A7: After successful calibration, the calibration distance automatically calculated by the software is displayed here

The actual distance of the darkroom is the distance from the center of the distribution photometer to the probe. Please refer to the darkroom drawing or take actual measurements.
The difference between the two distances should be controlled within 2% or less. If the difference is too large, the following steps may not be good enough:
a. The standard lamp is unstable. The calibration can be carried out only after the standard lamp is turned on and stabilized for 15 minutes.
b. The darkroom was not painted completely matte black. It may leak light or reflect light.
c. Hardware debugging is not well adjusted. Including host level, probe position and direction, gamma axis zero setting, etc.
d. During calibration, the adjustment of standard lamp direction is incorrect.
Please check the darkroom and refer to the instruction manual.

Q8: The DC sample lamp cannot be lit.
A8: Please make sure that the voltage and current of the sample lamp are within the limits of the DC power supply. For example, the maximum output voltage of DC3005 DC power supply is 30V, and the maximum output current is 5A.
If the sample needs a constant current power supply (CC), input its rated current value and a high enough voltage.
If the sample needs a constant voltage power supply (CV), input its rated voltage value and sufficient current.

Q9: The total luminous flux test is inaccurate.
A9: Confirm that the error between the calibration distance and the actual distance is within the normal range. (Refer to Clause 6 above)
If the sample is an asymmetric lamp, such as a street lamp,
① C (B) angle interval should be set as small as possible, such as 5 degrees, 10 degrees. If the sample is a symmetrical lamp, such as an indoor lamp, the angle spacing of C (B) can be set slightly larger, such as 22.5 degrees and 30 degrees. In any case, the angle interval of
② Gamma (Beta) is 1 degree.
During C-gamma test, if the illumination angle of the sample lamp is greater than 180 degrees, the range of
③ gamma test angle needs to be set to – 180 to 180 degrees.

Make sure the temperature of the darkroom is below 35 degrees.
During the test, please confirm that the sample lamp has been lit and stabilized, and all other lighting in the dark room has been turned off.

Q10: Abnormal light intensity curve shape
A10: Please confirm that the installation direction of the luminous surface of the lamp is correct. If the direction is skewed, it will definitely lead to abnormal light intensity distribution curve. As shown in the figure below, the light emitting surface of the lamp shall be straight downward.

If the tested lamp is an asymmetric lamp, each C angle of the sample may have different light intensity distribution curves. Different ways of installing on the fixture will result in different light intensity curves.

Q11: Abnormal street lamp test curve
A11: The street lamp is directional. If the installation direction is wrong, it may cause some test parameters, such as the abnormality of the street lamp CU curve. As shown in the figure below, the correct installation direction, C0 direction, and the lamp pole of the street lamp should be toward the host of the distribution photometer.

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

Tags：LSG-6000