The MP-100 has a sensor integrated into the top of the hand-held meter that displays and stores measurements in W m-2. Typical applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks and solar panel arrays.
The meter has a sample and log mode, and will record an integrated daily total in MJ m-2 d-1. Sample mode will record up to 99 manual measurements. Log mode will power the meter on/off to make a measurement every 30 seconds. Every 30 minutes the meter will average the sixty 30 second measurements and record the averaged value to memory. The meter can store up to 99 averages, once full it will start to overwrite the oldest measurement with new ones. An integrated daily total will be recorded from the 48 averaged measurements (making a 24 hr period). Sample and log measurements can be reviewed on the LCD display or by downloading the data to a computer, however, the integrated daily total can only be viewed by downloading the data to a computer. Downloading data to a computer requires the AC-100 communication cable (a standard USB cable will not work) and ApogeeAMS software.
Calibration Uncertainty ± 5 %
Measurement Repeatability Less than 1 %
Non-stability (Long-term Drift) Less than 2 % per year
Non-linearity Less than 1 % (up to 1750 W mˉ²)
Response Time Less than 1 ms
Field of View 180 ˚
Spectral Range 360 to 1120 nm (wavelengths where response is 10 % of maximum)
Directional (Cosine) Response ± 5 % at 75 ˚ zenith angle
Temperature 0.04 ± 0.04 % per C
Operating Environment 0 to 50 C, less than 90 % non-condensing relative humidity up to 30 C, less than 70 % non-condensing relative humidity from 30 to 50 C
Meter Dimensions 126 mm length, 70 mm width, 24 mm height
Sensor Dimensions 24 mm diameter, 28 mm height
Mass 150 g
Warranty 4 years against defects in materials and workmanship