Specifications
Principal Specifications SPAD-502Plus
| Type | Chlorophyll Meter SPAD-502Plus | |
|---|---|---|
| Measurement subject | Crop leaves | |
| Measurement method | Optical density difference at 2 wavelengths | |
| Measurement area | 2 mm × 3 mm | |
| Subject thickness | 1.2 mm maximum | |
| Subject insertion depth | 12 mm (with stopper having position adjustable from 0 to 6 mm) | |
| Light source | 2 LED elements | |
| Receptor | 1 SPD (silicon photodiode) | |
| Display | LCD panel showing 4-digit measurement value (values shown to first decimal place) and 2-digit number of measurements; Trend graph of values in memory can also be shown. | |
| Display range | -9.9 to 199.9 SPAD units | |
| Memory function | Memory capacity for up to 30 values; Calculation/display of average of data in memory also possible | |
| Power source | 2 AA-size alkaline batteries | |
| Battery life | More than 20,000 measurements (when using new alkaline batteries under Konica Minolta test conditions) | |
| Minimum interval between measurements | Approx. 2 seconds | |
| Accuracy | Within ±1.0 SPAD units (for SPAD value between 0.0 and 50.0 under normal temperature/humidity) “*” added to display when measurement exceeds 50.0 SPAD units | |
| Repeatability | Within ±0.3 SPAD units | For SPAD value between 0.0 and 50.0 (with no change in sample position) |
| Reproducibility | Within ±0.5 SPAD units | |
| Temperature drift | Within ±0.04 SPAD units/°C | |
| Operating temperature/humidity range | 0 to 50°C; Relative humidity of 85% or less (at 35°C) with no condensation | |
| Storage temperature/humidity range | -20 to 55°C; Relative humidity of 85% or less (at 35°C) with no condensation | |
| Size; Weight | 78（W）×164（H）×49（D）mm、200g（excluding batteries | |
| Other | Warning buzzer; User compensation factor | |
| Standard accessories | Depth stop; Strap; 2 AA-size alkaline batteries; Soft case; Reading checker | |
Specifications and appearance subject to change without notice.
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