Linshang LS331 Flaw Detection Light Meter

Specifications

• Product Name: LS331 Flaw Detection Light Meter
• Manufacturer: Shenzhen Linshang Technology Co., Ltd.
• Function: Multifunctional flaw detection light meter
• Measurements: UV power, visible light illuminance, correlated color temperature (CCT)
• Standards Met: JJG 245-2005, JJG 879-2015, GBT 5097-2020

Product introduction

The instrument is a multifunctional flaw detection light meter, specifically designed for non-destructive testing (NDT). It simultaneously measures UV power, visible light illuminance, and correlated color temperature (CCT). It meets the standards for non-destructive testing, penetrant testing, and magnetic particle testing.

Standards for the product

• JJG 245-2005 Verification Regulation of Illuminance Meter
• JJG 879-2015 Verification Regulation of Ultraviolet Radiometers
• GBT 5097-2020 Non-destructive testing——Penetrant testing and magnetic particle testing——Viewing conditions

Technical Parameters

1. UV spectral response: 315nm-405nm, λp = 365nm
2. UV power measurement range: 0 – 200,000 μW/cm²
3. UV power resolution: 0.1 μW/cm²
4. UV measurement accuracy: H<50 μW/cm²: ±5 μW/cm², H>=50 μW/cm²: ±10%H (H is the standard value)
5. UV unit: μW/cm² (default), mW/cm², W/m²
6. Illuminance measurement range: 0 – 1,000,000 Lux
7. Illuminance resolution: 0.1 Lux
8. Illuminance measurement accuracy: ≤±(3%H + 2 Lux) (H is the standard value, calibrated under CIE standard A light source)
9. Illuminance unit: Lx (default), FC
10. CCT range: 1000 – 100,000K
11. Response time: <0.7s
12. Test aperture diameter: Φ21mm
13. Size: 188.5mm (L) * 75.2mm (W) * 30.3mm (H)
14. Weight: about 232 (including batteries)
15. Display: 240*160 dot matrix LCD
16. Battery: 2 AA alkaline batteries
17. Operating environment: Temperature (0～40)℃, Humidity <85%RH
18. Supply Voltage：DC3V
19. Operating Current：20mA
20. Operating Power Consumption：60mW

Spectral response curve
The UV measurement uses high-precision UV filter and professional UV detector. It almost no response to visible wavelengths, eliminate the impact of other spectral bands on the measurement accuracy. Illuminance measurement adopts spectral sensor design, and illuminance values is obtained by integral of the V(λ) function with the measured spectrum, ensuring the spectral response curve of the instrument is in perfect agreement with V(λ).

Product features

1. The instrument measures UV power and visible light illuminance, specifically designed for NDT.
2. Large measurement range, UV range up to 200,000 μW/cm² and visible light range up to 1 million Lx.
3. The visible light measurement uses spectral sensor design with spectral response fully consistent with the V(λ) function, ensuring accurate measurements for all light sources.
4. The instrument features CCT measurement function, meeting the requirements of the GBT
   5097-2020 for color temperature detection.
5. It has statistical function for the maximum values of UV power and visible light illuminance.
6. Auto shutdown can be set to prevent battery drain when not in use.
7. Utilize advanced digital probe technology, where digital signal processing is performed directly, reducing interference and providing excellent measurement accuracy.

Operations

Power on/off

Power on: Press to power on the instrument. After powering on, the instrument displays the information of the version number, serial number and enters into the measurement interface:

Power off: Long press the button to power off; or the instrument will automatically power off when “Auto Off” set to ON.

Parameter settings mode

In the off state, long press the button 3s to enter the system setting mode. In the setting mode, there  are seven sub-options, the can select Language, UV Unit, VIS Unit, AutoOff, OffTime,

Factory Settings and Exit. Short press to confirm selection.

Language

Short press to enter the language selection, button to select the language, short press , and the setting is completed.

UV Unit
Short press to enter unit selection,  button to select unit, short press and setting is finished.

VIS Unit
Short press to enter unit selection,  button to select unit, short press and setting is finished.

 Auto Off:

Short press the to enter auto power off selection, button to select [Yes/No] ,  auto power off, short press then the setting is completed.

Off Time

Short press to select the shutdown time, to extend or shorten the shutdown time (long press to fast change the duration; may be set between 1-255 minutes), then short press  to finish the setting.

Factory Settings

Short press to enter the restore factory selection interface,  to switch the [Yes/No] option, short press to confirm the option and return to the setting interface.

Exit

Press briefly to exit the main menu and access the measuring interface.

Measurement mode
After powering on the instrument, it enter the measurement interface. The system displays the maximum UV power, maximum visible light illuminance, real-time UV power, real-time visible light illuminance, and correlated color temperature.

In the measurement mode, if the backlight is off, short press the button to light the backlight; if the backlight is already lit, short press the button, and the “HOLD” icon will be displayed in the lower left corner of the interface. All data will be holding on the LCD, and the current data will be recorded.

In the “HOLD” state, if the backlight is off, press the button to light the backlight; if the backlight is already lit, short press the button to cancel the HOLD state and start a new measurement.

In the measurement mode, if the backlight is off, short press the button to light the backlight; if the backlight is already lit, press the button to clear up the current data and start a new measurement.

In the measurement mode, short press to enter the Record data query mode

Record data query mode

• Short press , enter the record data query mode. The instrument will display the latest recorded data No.1 (up to 9 recorded data are stored in the instrument, and the oldest recorded data will be deleted automatically when exceed 9 recorded data).
• Short press to scroll up or down a recorded data.
• Short press to display data deletion prompt interface, short press [Yes/No], then short press to confirm.
• Short press the button to enter the measurement mode.

Aviation plug connection
When plugging out the probe, make sure not to violently rotate and pull the connector, but plug out the plug by the way as shown in the following diagram.

Measurement and precautions

1. When not in use, please long press the button to power off.
2. Avoid contacting with corrosive materials and keep away from high humidity.
3. Cover the probe with the dust cap after shutting down to avoid contamination of photosensitive part of the probe.
4. The recommended period of calibration is one year.
5. Since the UV probe is very sensitive to humidity changes, the storage environment is crucial. When not in use for a long time, be sure to store the instrument in a low humidity environment.
6. When the instrument displays Low Battery, please replace the battery.

Packing list

Service

1. The meter has one-year warranty. If the instrument works abnormally, please send the whole instrument to our company for maintenance
2. Provide users with spare parts and lifelong maintenance services
3. Provide the users with the meter calibration service
4. Free technical support for long term

• Manufacturer: Shenzhen Linshang Technology Co., Ltd.
• Website: www.linshangtech.com
• Service hotline: 086-755-86263411
• Email: sales21@linshangtech.com

FAQ

• Q: Can this meter be used for outdoor measurements?
  A: Yes, the LS331 Flaw Detection Light Meter can be used for both indoor and outdoor measurements.
• Q: How often should the meter be calibrated?
  A: It is recommended to calibrate the meter annually for accurate readings.

Documents / Resources

Linshang LS331 Flaw Detection Light Meter [pdf] User Manual LS331, LS331 Flaw Detection Light Meter, Flaw Detection Light Meter, Detection Light Meter, Light Meter, Meter

References

• User Manual