Indledning
The Extech HD400 is a robust light meter designed for accurate measurement of light intensity across a wide range. It utilizes a precision silicon photo diode and a spectral response filter to ensure cosine and color corrected measurements. This manual provides essential information for the proper setup, operation, and maintenance of your HD400 Light Meter.
Nøglefunktioner:
- Large backlit LCD display with 40-segment bar graph for clear readings.
- Wide measurement range up to 40,000 Fc (Foot-candles) or 400,000 Lux.
- Cosine and color corrected measurements for high accuracy.
- Precision silicon photo diode and spectral response filter for reliable data.
- Peak mode (10mS) to capture the highest reading.
- Relative mode to indicate changes in light levels.
Sikkerhedsoplysninger
Please read and understand all safety instructions before operating the Extech HD400 Light Meter. Failure to follow these instructions may result in damage to the device or personal injury.
- Udsæt ikke enheden for ekstreme temperaturer, fugtighed eller direkte sollys i længere perioder.
- Hold enheden væk fra stærke elektromagnetiske felter.
- Forsøg ikke at åbne eller ændre enheden. Overlad al service til kvalificeret personale.
- Sørg for, at batterirummet er forsvarligt lukket under drift.
- Bortskaf batterier i henhold til lokale regler.
Pakkens indhold
Bekræft at alle varer er til stede i pakken:
- Extech HD400 Light Meter
- Light sensor with 3ft (1m) cable and protective cover
- Windows compatible software with USB cable
- Hårdt taske
- 9V batteri

Image: The Extech HD400 Light Meter shown with its light sensor, USB cable, software CD, and hard carrying case, illustrating the complete package contents.
Opsætning
1. Batteriinstallation
- Locate the battery compartment on the back of the HD400 meter.
- Åbn batterirummets dæksel.
- Insert the supplied 9V battery, observing the correct polarity (+/-).
- Luk batterirummets dæksel forsvarligt.
2. Connecting the Light Sensor
- Connect the cable from the light sensor to the input jack located at the top of the HD400 meter.
- Sørg for, at forbindelsen er fast.
- Remove the protective cover from the light sensor before taking measurements.

Image: The Extech HD400 Light Meter with its light sensor connected via cable, ready for use. The main display shows a reading.
3. Softwareinstallation (valgfrit)
For data logging and analysis, install the Windows compatible software:
- Insert the software CD into your computer's CD-ROM drive.
- Følg instruktionerne på skærmen for at fuldføre installationen.
- Connect the HD400 meter to your computer using the supplied USB cable.
- Refer to the software's help documentation for detailed usage instructions.
Betjeningsvejledning
Tænd/sluk
- Tryk på MAGT knappen til at tænde eller slukke måleren.
- The meter features an Auto Power Off (APO) function to conserve battery life.
Tager målinger
- Ensure the light sensor is positioned in the area where light intensity is to be measured. The sensor should be facing the light source.
- The current light reading will be displayed on the large backlit LCD.

Image: A person holding the Extech HD400 Light Meter and its sensor to measure light levels in a stairwell, demonstrating typical usage.
Funktionsknapper
- ENHEDER: Press to toggle between Foot-candles (Fc) and Lux units.
- RANGE: Press to manually select the measurement range. The meter also has an auto-ranging feature.
- MAX/MIN: Press to display the maximum or minimum light reading recorded since the meter was powered on or the function was reset.
- SPIDS: Activates Peak mode, capturing the highest reading over a 10mS period. Useful for measuring short light flashes.
- REL (Relative): Activates Relative mode. This sets the current reading as a reference point (zero), and subsequent readings show the deviation from this reference.
- HOLDE: Fryser den aktuelle aflæsning på displayet. Tryk igen for at slippe.
- BAGGRUNDSLYS: Press the light bulb icon button to turn the display backlight on or off for improved visibility in low-light conditions.
Opretholdelse
Rensning
- Wipe the meter and sensor with a dry, clean, soft cloth.
- Brug ikke slibende rengøringsmidler eller opløsningsmidler.
- Keep the light sensor clean and free of dust or smudges to ensure accurate readings.
Udskiftning af batteri
When the battery indicator appears on the display, replace the 9V battery as described in the "Battery Installation" section under Setup.
Opbevaring
- Hvis måleren opbevares i længere tid, skal batteriet fjernes for at forhindre lækage.
- Store the meter in its hard carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
Fejlfinding
| Problem | Mulig årsag | Løsning |
|---|---|---|
| Måleren tænder ikke. | Dødt eller forkert installeret batteri. | Udskift 9V-batteriet, og sørg for korrekt polaritet. |
| Upræcise aflæsninger. | Dirty sensor; incorrect unit selected; sensor not properly positioned. | Clean the sensor; check UNITS setting; ensure sensor faces light source. |
| Displayet viser "OL" (Overbelastning). | Light intensity exceeds the current range. | Switch to a higher range using the RANGE button or move to a less intense light area. |
| Problemer med softwareforbindelse. | Incorrect USB driver; faulty USB cable; software not installed correctly. | Reinstall USB drivers; try a different USB port/cable; reinstall software. |
Specifikationer
| Specifikation | Detalje |
|---|---|
| Modelnummer | HD400 |
| Måleområde | Up to 40,000 Fc or 400,000 Lux |
| Sensortype | Precision Silicon Photo Diode with Spectral Response Filter |
| Vise | Stor baggrundsbelyst LCD med 40-segments søjlediagram |
| Peak Mode | 10mS capture |
| Strømkilde | 9V batteri (inkluderet) |
| Produktdimensioner | 8.26 x 18.42 x 5.72 cm |
| Varens vægt | 390 g |
| Fabrikant | FLIR SYSTEMS, INC. |
Garanti og support
For warranty information and technical support, please refer to the documentation provided with your product or visit the official Extech webwebsted. Behold din købskvittering som købsbevis i tilfælde af garantikrav.
Extech is a brand of FLIR Systems, Inc.





