The ILT 710 is a fully portable illuminance photometer that reports the flicker statistics for a light source, including percent flicker, SVM (the stroboscopic visibility measure), flicker index, flicker frequency and intensity as a function of time. Unlike many other flicker meters, the ILT 710 doesn’t need to be tethered to a computer – measurements are stored onboard and can be downloaded to PC after.
The ILT 710 is a fully portable illuminance photometer that reports the flicker statistics for a light source, including percent flicker, SVM (the stroboscopic visibility measure), flicker index, flicker frequency and intensity as a function of time. Unlike many other flicker meters, the ILT 710 doesn’t need to be tethered to a computer – measurements are stored onboard and can be downloaded to PC after.
Take the headache out of flicker measurements with the ILT7 10. The ILT 710’s fast sampling (50kHz) rate with instantaneous auto-ranging capability allows you to take flicker measurements in real time by simply walking around a space. There is no need to “capture” measurements. The ILT 710’s remote sensor has an excellent cosine response and results can be viewed as numeric or graphical units on the display.
Key Features
The ILT 710 is an economical light meter that’s perfect for any technician or site auditor’s tool bag. The device comes with an ISO 17025 accredited calibration, for results you can rely on.
Flicker Metrics
The ILT 710 measures the following flicker metrics:
Percent Flicker: 0-100% scale, which is the modulation depth from average for peak-to-peak amplitude.
SVM: the Stroboscopic Visibility Metric, where an SVM value of 1 means that for the particular waveform, standard observers will be able to see a stroboscopic effect 50% of the time. < 1 is less than 50%; >1 is more than 50%.
Flicker Index: the ratio of the amount of light energy above the average light level over the total light energy.
Flicker Frequency: expressed in Hertz, is the frequency with which the signal is dominantly superimposed.
The ILT 710 also charts intensity versus time, depicting the modulation shape and depth.
Meter Type | High speed illuminance photometer |
Spectral Response | Matched to CIE photopic observer, 380-780nm |
Sampling Rate | 6kHz time domain sampling (50kHz over-sampling) |
Measurement Time | 100ms |
Photometric Measurements | Illuminance (lux) |
Flicker Measurements | Percent Flicker |
| Flicker Index |
| SVM (Stroboscopic Visibility Measure) |
| Flicker Frequency |
Range (illuminance) | 1 to 15,000 lux |
Uncertainty |
|
Illuminance | ± 4.328% |
Flicker Percent | ± 5% (> 100 lux) |
Flicker Index | ± 5% (> 100 lux) |
Range for Temporal Light Artifacts |
|
Flicker | 10 to 3000Hz |
SVM | 80 to 2000Hz, > 100 lux (per IEC TR 63158) |
Interface | USB 2.0 Mini |
Power Supply | USB powered, internal Lithium ion battery |
Charging | 5V DC, 100/500mA over USB |
Dimensions |
|
Meter | 37 x 67 x 24mm (L x W x D) |
Sensor | 42mm dia. x 37mm tall |
Weight | 0.25kg |
Mount | ¼-20 tripod |
Operating Temperature | 0-40°C ambient |
Flicker is a temporal light artifact (TLA) caused by visible and invisible modulation of the light source’s output. Unlike incandescent and fluorescent lamps, LED light sources can rapidly turn on and off with no residual dissipation, causing varying levels of flicker. The level, frequency and percentage of flicker can have different impacts on the safety and health effects for both people and animals exposed to flickering light.
Flicker is extremely problematic for people with certain medical conditions such as migraines, epilepsy, and autism, to name a few. Flicker can make moving objects appear stationary, creating a workplace hazard, and interfere with videography equipment, creating a visual disruption in filming.
While flicker % and flicker index time domain metrics have been well known for many years, there are new metrics that add frequency domain components that must also be taken into account. The Stroboscopic Effect Visibility Measure (SVM), developed by Philips and CIE, identifies potential perception issues related to detecting the motion of objects.
The metric is normalised based on controlled human subject testing with a value of 1 indicating that 50% of observers would perceive objects to be moving more slowly than they are actually moving. A value of less than 1 would indicate less than 50% of observers would have the issue and a value of greater than 1 indicates that more than 50% of observers would see the issue.
For further insight, read our blog “What is Flicker”.
Download datasheet: ILT 710 Flicker Photometer
Download user manual: ILT 710 User Manual
Watch a video: ILT 710 Tutorial
Blog: What is Flicker?
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