LISUN LSG-5000 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 device has static electricity.
A1: Please connect the grounding terminal on the back of the host and the grounding terminal on the back of the cabinet separately to the ground.

Host grounding port

Cabinet grounding port

Q2: The power factor displayed in the electrical parameter table is negative.
A2: Please exchange and connect the wiring A1 and A2 on the back of the electrical parameter table.

A1 A2 exchange connection

Q3: (Trial for DC type electrical parameter meter) Test that the DC voltage is negative.
A3: Swap and connect the V1 and V2 wires on the back of the electrical parameter table.

Q4: The software is unable to communicate with the device.
A4: Confirm that the drivers for the RS485 USB and RS232 USB adapter cables have been successfully installed (the driver program is in the small CD of the adapter cable packaging case. If not, please contact the after-sales service of Lishan Electronics).

Connect the other end of the device’s USB cable to the black USB 2.0 port that comes with the computer. Please try to use a desktop computer with a USB connection to the black USB 2.0 port on the back of the host.

Q5: The standard light cannot be turned on.
A5: Confirm that the cabinet AC/DC switch is on the DC end.

DC end

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

The filament is intact

The standard lamp is a constant current light source. Manually select the correct communication port for the DC power supply. 2. Enter the voltage and current values that are consistent with the standard lamp certificate, and 3. Select CC (constant current mode). Then light up.

Standard Lamp Settings

If it still cannot light up, there is a problem with the wiring. Please check the wiring according to the user manual.

Q6: There is a significant difference between the calibration distance and the actual distance.
A6: After successful calibration, the calibration distance automatically calculated by the software will be displayed here

Calibration distance

The actual distance from the darkroom is the distance from the center of the distribution photometer to the probe. You can refer to the darkroom drawings or actual measurements.

The difference between two distances should be controlled within 2% or less. If the difference is too large, the following steps may not be done well enough:
a. The standard light is unstable. The standard light needs to be lit and stabilized for 15 minutes before calibration can proceed.

b. The darkroom was not painted completely matte black. May leak light or reflect light.
c. The hardware debugging was not adjusted properly. Including host level, probe position and direction, gamma axis zero setting, etc.
d. The adjustment of the standard light direction during calibration is incorrect.

Please check the darkroom and refer to the user manual.

Q7: DC sample light cannot be lit.
A7: Please first confirm that the voltage and current of the sample lamp are within the limit range of the DC power supply. The maximum output voltage of the DC3005 model DC power supply is 30V and the maximum output current is 5A.

If the sample requires a constant current power supply (CC), it is necessary to input its rated current value and a sufficiently high voltage.

If the sample requires a constant voltage power supply (CV), it is necessary to input its rated voltage value and a sufficiently high current.

Q8: The total light flux test is not accurate.
A8: Confirm that the error between the calibration distance and the actual distance is within the normal range. (Refer to Article 6 above)

If the sample is an asymmetric light fixture, such as a street lamp, the angle spacing of ① C (B) should be set as small as possible, such as 5 degrees or 10 degrees. If the sample is a symmetrical lamp, such as an indoor lamp, the C (B) angle interval can be set slightly larger, such as 22.5 degrees or 30 degrees. In any case, the angle interval of ② Gamma (Beta) should be 1 degree.

During C-Gamma testing, if the illumination angle of the sample lamp is greater than 180 degrees, the testing angle range of ③ Gamma needs to be set to -180 to 180 degrees.

Test angle range

Ensure that the temperature in the darkroom is below 35 degrees.
During the test, please confirm that the sample lamp is on and stable, and that all other lighting in the darkroom is turned off.

Q9: Abnormal shape of light intensity curve
A9: 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 curves. As shown in the following figure, the luminous surface of the lamp should be straight downwards.

lamp facing downwards

If the tested lamp is an asymmetric lamp, there may be different light intensity distribution curves for each C-angle of the sample. Different installation methods on fixtures will result in different light intensity curves.

Fixture position

Q10: Street Lamp Test Curve Abnormality
A10: Street lights have directionality, and if installed in the wrong direction, it may cause some test parameters such as abnormal CU curve of the street lights. The correct installation direction as shown in the figure, C0 direction, should be towards the direction of the distribution photometer host.

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