BTMETER BT-881E Digital Illuminance/Light Meter User Manual

1. Introduktion

The BTMETER BT-881E is a digital illuminance meter designed for precise measurement of light intensity. It provides accurate readings in both Lux and Foot Candles (FC) across a wide range, making it suitable for various applications including home, garden, aquarium, plant cultivation, schools, offices, and LED lighting assessments. Its user-friendly design features a rotatable sensor and data recording capabilities for enhanced convenience.

2. Nøglefunktioner

• Høj nøjagtighed: Provides reliable measurements with an accuracy of +/- 4% readings +/- 0.5% f.s (at 10,000 Lux; 1,000 FC) and +/- 5% readings +/- 10 digits (at 300,000 Lux; 30,000 FC).
• Hurtigt svar: Features a rapid sampling rate of 2-3 times per second, allowing for instant light measurements.
• Bredt måleområde: Capable of measuring luminance from 0.01 to 300,000 Lux (0.01 to 30,000 Foot Candles) with a resolution of 0.01.
• Nem at bruge: Equipped with a 270° rotatable light sensor, eliminating the need to reposition the entire meter for different measurement angles.
• Dataoptagelse: Allows storage of up to 33 sets of readings for later review og analyse.
• Temperaturtestning: Includes functionality for temperature measurement.
• Relativ måletilstand: Displays the difference between current and recorded data, useful for comparative analysis.

Figur 1: Overview of BTMETER BT-881E features.

3. Hvad er der i æsken

• 1 x BTMETER Lux Meter (BT-881E)
• 1 x brugermanual

4. Opsætning

4.1 Batteriinstallation

The BT-881E requires batteries for operation. To install or replace batteries:

1. Find batterirummet på bagsiden af ​​enheden.
2. Brug en lille stjerneskruetrækker til at åbne batteridækslet.
3. Indsæt de nødvendige batterier, og sørg for korrekt polaritet.
4. Securely close the battery cover and tighten the screw.

5. Betjeningsvejledning

Familiarize yourself with the buttons and display for effective operation.

Figure 2: BTMETER BT-881E display with backlight on and off.

5.1 Tænd/sluk

Tryk på Magt knap () for at tænde eller slukke enheden.

5.2 Valg af enhed (Lux/FC)

Tryk på Lux/Fc button to switch between Lux and Foot Candle measurement units.

5.3 Baggrundslys

Tryk på LYS button to toggle the display backlight on or off for visibility in different lighting conditions.

5.4 Datahold

Tryk på HOLDE knappen for at fryse den aktuelle aflæsning på displayet. Tryk igen for at slippe.

5.5 Maks./min.-måling

Tryk på MAX/MIN button to cycle through maximum, minimum, and current readings. This allows you to track the highest and lowest light levels detected during a measurement session.

5.6 Relative Measurement

Tryk på REL button to enter relative measurement mode. This mode displays the difference between the current measurement and a previously recorded reference value.

6. Måletilstande

The BT-881E supports three primary measurement modes:

• Min. tilstand: Displays the lowest light intensity recorded since the mode was activated.
• Max tilstand: Displays the highest light intensity recorded since the mode was activated.
• Relativ tilstand: Shows the difference between the current light reading and a set reference point.

Figure 3: Illustration of the three measurement modes.

7. Dataregistrering

The meter can record up to 33 sets of data. To record a reading, press the REC button. To recall recorded data, press the REC button again and use the arrow keys (if available, or cycle through with repeated presses) to navigate through the stored values.

Figure 4: Data recording and hold functions.

8. Nøjagtighed

The BT-881E is equipped with a high-precision photometric sensor for accurate light measurement. It is calibrated to a standard incandescent lamp at a color temperature of 2556K.

• Accuracy (≤ 10,000 Lux; 1,000 FC): ±4% readings ±0.5% f.s
• Accuracy (> 10,000 Lux; 1,000 FC): ±5% readings ±10 digits
• Opløsning: 0.01 Lux / FC

Figure 5: High-precision photometric sensor and accuracy details.

9. Specifikationer

Figur 6: Produktdimensioner.

10. Fejlfinding

If you encounter issues with your BTMETER BT-881E, consider the following common solutions:

• Ingen skærm-/strømproblemer: Kontroller batteriinstallationen, og sørg for, at batterierne ikke er afladede. Udskift om nødvendigt.
• Upræcise læsninger: Ensure the sensor is clean and unobstructed. Verify that the correct measurement unit (Lux/FC) is selected. Avoid measuring in rapidly changing light conditions if stable readings are required.
• Skærmen reagerer ikke: Prøv at slukke og tænde enheden igen. Hvis problemet fortsætter, skal du fjerne batterierne og sætte dem i igen.

For persistent problems, contact BTMETER customer support.

11. Vedligeholdelse

To ensure the longevity and accuracy of your BTMETER BT-881E:

• Rensning: Gently wipe the device, especially the light sensor, with a soft, dry cloth. Do not use abrasive cleaners or solvents.
• Opbevaring: Store the meter in its protective carrying case in a cool, dry place away from direct sunlight and extreme temperatures. Remove batteries if the device will not be used for an extended period to prevent leakage.
• Sensorbeskyttelse: Always keep the sensor cap on when the device is not in use to protect the photometric sensor from dust and damage.

12. Garanti og support

For information regarding product warranty, technical support, or service, please refer to the official BTMETER webwebstedet eller kontakt deres kundeserviceafdeling. Gem din købskvittering som købsbevis i tilfælde af garantikrav.