Products

Type

Chlorophyll Meter SPAD-502Plus

Measurement subject

Crop leaves

Measurement method

Optical density difference at 2 wavelengths

Measurement area

2 mm x 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 f 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 inerval between measurements

Approx. 2 seconds

Accuracy

Within ±1.0 SPAD units (for SPAD value between  0.0 and 5.0 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 5.0 (with no change in simple position)

Reproducibility

Within ±0.5 SPAD units

Temperature drift

Within ±0.4 SPAD units/°C

Operating temperature/humidity range

0 to50°C; Relative humidity of 85% or less (at 35°C) with no condensation

Storage temperature/humidity range

­20 to 55°C; Relative humidity 0f 85% or less (at 35°C) with no condensation

Size: weight

78 (W) x 164 (H) x 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