Smartphone/tablet App for the C-4000 SEKONIC LD：Spectrometer ：Products：SEKONIC CORPORATION

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Smartphone/tablet App for the C-4000 SEKONIC LD

The Lighting Designer’s Dream App: Makes the workflow smoother than ever

Using the dedicated app, SEKONIC LD, you can remotely control the C-4000 from your smartphone/tablet. You can check the measurement results using numerical values and more intuitive graphical displays on the app. Not only can remote measurement results be shown and saved in the SEKONIC LD, but it is also possible to transfer measurement data saved on the C-4000 meter to the app for display and storage. Furthermore, the advanced functions (in-app purchase) feature workflow improvements by adding a data plot function, automatic report generation function, etc.

SEKONIC LDアイコン

SEKONIC LD
[Recommended environment]
iOS 16.0 or later
Android OS 11.0 or later

* Depending on your region, you may not be able to download SEKONIC LD.
For more information, please contact Sekonic customer service.

Basic functions (included version)

Remote control further enhances the ease of use of the C-4000

You can remotely control the C-4000 from the SEKONIC LD on your smartphone/tablet by connecting them via Bluetooth. Measured results are displayed in numerical values and intuitive graphs. In remote measurement, the C-4000 becomes a light-receiving sensor during measurement, and the measured values are saved on the smartphone/tablet. You can use the basic functions of the SEKONIC LD without charge.

[Basic functions (included version)]

・Remote control of the C-4000 from a smartphone/tablet

・Import data from the C-4000 memory to a smartphone/tablet

・Various graph displays

・In-app data storage

・Status information display for the C-4000

・Supports 6 languages (English/German/French/Spanish/Italian/Japanese)

Remote control from the SEKONIC LD comes in handy in situations like this.

[Problems]

・Want to remotely control the meter so that my shadow does not affect the measured values

・Want to send a screenshot of the measurement results from my smartphone or tablet

・Want to measure hard-to-reach places such as low or high positions

[Solutions]

If you are concerned about the shadow of the person taking the measurement, you can solve the problem by triggering the C-4000 from a distance using the SEKONIC LD.

If you would like to share your measurement results, you can send a screenshot of the SEKONIC LD's measurement screen using your smartphone's communication function.

By using the C-4000 holder (under development) and a commercially available monopod, measurements in hard-to-reach places become more convenient.

* Be careful not to swing the C-4000 or hit it against the floor or wall.

Various graph display

In pursuit of simplicity of measurement, the C-4000 meter only displays numerical values, but with the SEKONIC LD, you can view various graphs of measured data on your smartphone/tablet.

Spectrum

The Spectrum displays the spectral distribution of the measured light source in a graph with a percentage of relative intensity and the wavelength. The graph can be viewed and saved via the SEKONIC LD.
CIE1931

CIE 1931 color space is based on the tristimulus values mathematically derived from color measurements, representing red, blue, and green light and theoretically representing the standard observer’s eye. The values of CIE 1931 are denoted by x and y coordinates.
CRI

The Color Rendering Index (CRI) measures the ability of a light source to reveal the colors of objects in contrast to a natural light source, such as the sun. Ra averages R1 to R8 out of the 15 CRI values, providing a general assessment of the light sources’ color capabilities.
TM-30-18

Published by IES (Illuminating Engineering Society), TM-30 is a color rendering index system that indicates how well a light source will reproduce a color accurately when it illuminates that object (as compared to a black body radiator – such as the sun).

Advanced functions (in-app purchase)

Measure, record, and report effortlessly with the all-in-one solution

Various functions are available to support your lighting measurement workflow, from measurement tasks to report creation. The cumbersome measurement and recording work that used to be done by two people can now be done by one person easily, and reports can be generated within the SEKONIC LD automatically.

* Start up the paid app while there is a mobile phone signal or an internet connection via Wi-Fi.

[Traditional workflow]

One person takes measurements and reads out the measured values.

・It's a pain to read it out loud one by one.

・Risk of misspoken or misheard.
The other person writes the measurements on the drawing.

・It was common to measure more than 100 locations at a single site.

・Writing by hand was a hassle.

・Mistakes also occurred.
Entering handwritten measurements into a computer

・Risk of misreading or typo of measurement values.

・Input work was cumbersome.
Create a report
The report was finally completed after taking measurements in pairs at the site, inputting the measured values into a computer, and adjusting the appearance of the report.

[New workflow]

Everything is on the
SEKONIC LD:
Measuring, recording,
reporting

・Done by one person easily

・Quick

・Accurate

[Advanced functions (in-app purchase)]

・Plotting measured values on drawing/photo

・Adding photo and memo to a measured value

・Linking GPS location information

・Automatic report generation

・Share reports and measured values using the smartphone communication function

・Data management for each project

・Detailed settings such as selection of measurement items displayed on the drawing

Workflow example on the SEKONIC LD

[Import drawings/photos and create titles]

You can import on-site drawings such as lighting diagrams into the SEKONIC LD. If you do not have a drawing, you can take a photograph of the site and use it in place of the drawing. The screen on the left is an example of taking a photo of the scene and importing it into the app.

[Plot the measured value directly on the drawing or image]

Measured values are saved associated with the locations plotted on the drawings or the site photographs. The measurement value display unit can be selected from the following.

・lx (illuminance)

・K (color temperature)

・⊿uv (color deviation)

・Ra (average of rendering index, CRI)

・Rf/Rg (TM-30-18)

・x, y (CIE 1931, chromaticity coordinates)

The screen on the left is an example of taking 10 measurements.

[Add note/image references in real time]

Special lighting situations that occur and require detailed notes and images, can be created during the measurement process. Images can be taken on the spot or saved images can be linked. The screen on the left is an example of adding a photo and note to the measured value.

[GPS coordinates to recall measurement location]

Measurement data can be stored with linked GPS coordinates for easy recall of onsite locations. Included along with other critical information in the location report.

[App ready report]

Create PDF or CSV reports within the SEKONIC LD. The report includes GPS location, location image or captured drawing with plotted values, CSV detailed measurement data, and graphs (Spectrum, CIE 1931, CRI, and TM-30) for each measured plotted light source.

Report of measured value plotted on the drawing/photo
Report of GPS data acquired at the measurement location
Report of measured value list
Report of measured value with graph and on-site photo

[Share data from the SEKONIC LD via your smartphone/tablet]

Quickly and easily share reports, and measurement data with notes and images on-location via your smartphone.

Operating environment

for iPhone/iPad

Compatible OS: iOS, iPadOS
(compatible with major versions from the latest OS to the previous generation)

for Android

Compatible OS: Android OS
(compatible with major versions from the latest OS up to 3 generations ago)

[Supported languages]

English, German, French, Spanish, Italian, Japanese

The following devices are used for the evaluation of SEKONIC LD.

[Smartphone]

・iPhone SE (3rd generation)

・iPhone 15

・Galaxy S23 Ultra

・Galaxy A23 5G

[Tablet]

・12.9-inch iPad Pro 2022 (6th generation)

・iPad mini(2021)

・Galaxy Tab S9 FE

Key Features of the SEKONIC LD

	Included version (Free download)	Advanced version (In-app purchase)
Remote control of the C-4000	Yes	Yes
Import data from the C-4000 memory	Yes	Yes
Graph displays (Spectrum/CIE 1931/CRI/TM-30-18)	Yes	Yes
In-app data storage	Yes	Yes
Status information display for the C-4000	Yes	Yes
Support 6 languages (English/German/French/Spanish/Italian/Japanese)	Yes	Yes
Plotting measured values on drawing/photo	-	Yes
Adding photo and memo to a measured value	-	Yes
Linking GPS location information	-	Yes
Automatic report generation	-	Yes
Share reports and measured values using the smartphone communication function	-	Yes