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 carry case, USB lead and 9V battery.

Features

• Light-measuring levels ranging form 0.1Lux~0.1kLux/0.01FC~0.01kFC, repeatedly
• High accuracy and rapid response
• Data-hold function for holding measuring values
• Unit and sign display for easy reading
• Automatic zeroing
• Meter corrected for spectral relative efficiency
• Correction factor need not be manually calculated for non-standard light sources
• Short rise and fall times
• Peak-hold function for tracing the peak signal of light pulse with least duration
• Capable of selecting measuring mode in Lux or FC scale alternatively
• Auto power off: 20 minutes
• Maximum and minimum measurements
• Relative reading
• Easy to read large backlit display
• USB output for PC logging (USB cable supplied)
• Auto ranging
• Carry Case with adjustable strap
• Windows compatible software (CD-ROM)

Specification

• Display: 3-3/4 digit LCD with high speed 40 segment bar graph.
• Measuring Range: Lux,400.0 Lux,4000 Lux,40.00 KLux and 400.0 KLux /40.00 FC,400.0 FC,4000 FC,40.00 KFC.NOTE: 1FC=10.76Lux,1KLux=1000Lux,1KFC=1000FC
• 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 of analog bar-graph indication;1.5times/sec of digital display.
• Photo Detector: One silicon photo diode and spectral response filter.
• Operating Temperature & Humidity: 0°C to 40°C & 0% to 80% RH.
• Storage Temperature & Humidity: -10°C to 50°C & 0% to 70% RH.
• Power Source: 1 x 9V battery (supplied)
• Photo Detector Lead Length: 150cm (approx.)
• Photo Detector Dimensions: 115L×60W×20H(mm)
• Meter Dimensions: 170(L) × 80(W) × 40(H)
• Weight: 390g

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