Bubuka
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.
Fitur konci:
- 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.
Émbaran Kasalametan
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.
- Do not expose the device to extreme temperatures, humidity, or direct sunlight for prolonged periods.
- Jauhkeun alat tina médan éléktromagnétik anu kuat.
- Ulah nyobian muka atawa ngaropéa alat. Rujuk sadayana jasa ka tanaga anu mumpuni.
- Pastikeun kompartemen batré ditutup pageuh nalika dioperasikeun.
- Buang batré nurutkeun peraturan lokal.
Eusi pakét
Pastikeun yén sadaya item aya dina bungkusan:
- Extech HD400 Light Meter
- Light sensor with 3ft (1m) cable and protective cover
- Windows compatible software with USB cable
- Kasus mawa teuas
- batré 9V

Image: The Extech HD400 Light Meter shown with its light sensor, USB cable, software CD, and hard carrying case, illustrating the complete package contents.
Disetél
1. Pamasangan batré
- Locate the battery compartment on the back of the HD400 meter.
- Buka panutup kompartemen batré.
- Insert the supplied 9V battery, observing the correct polarity (+/-).
- Tutup panutup kompartemen batré aman.
2. Connecting the Light Sensor
- Connect the cable from the light sensor to the input jack located at the top of the HD400 meter.
- Ensure the connection is firm.
- 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. Pamasangan Parangkat Lunak (Opsional)
For data logging and analysis, install the Windows compatible software:
- Insert the software CD into your computer's CD-ROM drive.
- Turutan pitunjuk dina layar pikeun ngarengsekeun pamasangan.
- Connect the HD400 meter to your computer using the supplied USB cable.
- Refer to the software's help documentation for detailed usage instructions.
Parentah Operasi
Ngahurungkeun/Pareuman
- Pencét éta POWER tombol pikeun ngaktipkeun atanapi mareuman méter.
- The meter features an Auto Power Off (APO) function to conserve battery life.
Nyokot Pangukuran
- 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.
Tombol Fungsi
- UNIT: Press to toggle between Foot-candles (Fc) and Lux units.
- jajaran: 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.
- PUNCAK: 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.
- TAHAN: Freezes the current reading on the display. Press again to release.
- LAMPU BALIK: Press the light bulb icon button to turn the display backlight on or off for improved visibility in low-light conditions.
Pangropéa
beberesih
- Wipe the meter and sensor with a dry, clean, soft cloth.
- Ulah make cleaners abrasive atawa pangleyur.
- Keep the light sensor clean and free of dust or smudges to ensure accurate readings.
Ngagantian batré
When the battery indicator appears on the display, replace the 9V battery as described in the "Battery Installation" section under Setup.
Panyimpenan
- If storing the meter for an extended period, remove the battery to prevent leakage.
- Store the meter in its hard carrying case in a cool, dry place, away from direct sunlight and extreme temperatures.
Pamérésan masalah
| Masalah | Mungkin Cukang lantaranana | Solusi |
|---|---|---|
| Méter teu hurung. | Batré pareum atawa salah dipasang. | Ganti batré 9V, mastikeun polaritasna bener. |
| Bacaan teu akurat. | Dirty sensor; incorrect unit selected; sensor not properly positioned. | Clean the sensor; check UNITS setting; ensure sensor faces light source. |
| Layar némbongkeun "OL" (Kaleuwihan beban). | Light intensity exceeds the current range. | Switch to a higher range using the RANGE button or move to a less intense light area. |
| Software connection issues. | Incorrect USB driver; faulty USB cable; software not installed correctly. | Reinstall USB drivers; try a different USB port/cable; reinstall software. |
spésifikasi
| Spésifikasi | Rincian |
|---|---|
| Nomer modél | HD400 |
| Rentang pangukuran | Up to 40,000 Fc or 400,000 Lux |
| Tipe sénsor | Precision Silicon Photo Diode with Spectral Response Filter |
| tampilan | LCD backlit badag kalayan grafik bar 40-segmén |
| Mode Puncak | 10mS capture |
| Sumber Daya | Batré 9V (kaasup) |
| Dimensi produk | 8.26 x 18.42 x 5.72 cm |
| Item Beurat | 390 g |
| Produsén | FLIR SYSTEMS, INC. |
Garansi sareng Rojongan
For warranty information and technical support, please refer to the documentation provided with your product or visit the official Extech websitus. Simpen resi pameseran anjeun salaku bukti pameseran pikeun klaim garansi.
Extech is a brand of FLIR Systems, Inc.





