Measures illuminance (Lux, footcandle) in the field, meeting CIE photopic spectral response and is fully cosine-corrected for the angular incidence of light. The HT-1309 digital illuminance meter is a precision instrument and is compact, tough and easy to handle. The light sensitive component is a very stable, long-life silicon photo diode and spectral response filter. Supplied with Windows compatible software for transferring data to a computer, removable rubber protective holster (including tilt stand), USB cable, carry case and 9V battery.
• High accuracy and rapid response. Short rise and fall times
• Peak-hold function for tracing peak signal of light pulse with least duration
• Data-hold function
• Automatic zeroing, auto ranging, relative reading
• Lux/FC measuring mode. Min/Max measurements
• Easy to read, large backlit display
• Windows compatible software (CD-ROM) supplied
| Technical Details |
|---|
| Display | 3 3/4 digit LCD with high speed 40 segment bar graph |
| Max Range | 400,000 Lux, 40,000 FC |
| Over Range Display | LCD will show "OL" symbol |
| Spectral Response | CIE Photopic (CIE human eye response curve) |
| Spectral Accuracy | CIE Vλ function f1'≤6% |
| Cosine Response | f2' ≤2% |
| Accuracy | ±5% rdg±10d.(<10,000Lux), ±10% rdg±10d.(>10,000Lux) |
| Repeatability | ±3% |
| Sampling Rate | 1.5 times/sec analog bar-graph and digital display |
| Photo Detector | One silicon photo diode and spectral response filter |
| Operating Temperature | 0°C to +40°C (+32°F to +104°F) |
| Operating Humidity | 0% to 80% RH |
| Power | 1 x 9V battery (supplied). Auto power-off: 20 minutes |
| Meter Dimensions | 170mm (L) x 80mm (W) x 40mm (H) |
| Photo Detector Dimensions | 115mm (L) x 60mm (W) x 20mm (H) + 150cm coiled lead |
| Weight | 390g |
