Der CS325DM, hergestellt von IMT Solar alsSi-RS485TC-T, wird normaleweise als Referenzzelle bei der Überwachung von PV-Anlagen verwendet. Das Sensorelement wurde entworfen um einem PV-Modul zu ähneln, vor allem in der Spektralantwort. Datenausgabe erfolgt über Modbus RTU RS-485. Campbell Scientific baut einen Stecker am Sensor an, der es ermöglicht, das Kabel im Feld einfach zu ersetzten.
Sensor | Silicon solar irradiation sensor |
Measurement Description | Solar irradiance measurements for outdoor monitoring of PV systems |
Irradiance Measurement Range | 0 to 1500 W/m2 |
Operating Temperature Range | -35° to +80°C |
Input Power | 8 to 28 Vdc (12 to 28 Vdc for 0 to 10 V analog output) |
Photovoltaic Cell | Crystalline Si, 20 mm x 20 mm, ~135 mA @ 1 sun |
Window | Low-iron solar glass, or CdTe-matching filter |
Cell Temperature Measurement | -40° to +100°C, Pt100 RTD |
Calibration Data | Internally calibrated; no calibration data to manage |
Enclosure Material | Powder-coated cast aluminum housing |
IP Rating | IP67 |
Cable Type | Shielded, weather-resistant, UV-rated, 24 AWG/0.2 mm2 |
Cable Connector | M12 circular connector, IP67 |
Response Time | 0.15 s |
Electronics Non-Linearity | ±0.03% of range |
Repeatability | ±0.02% of range |
Temperature Drift | ±0.4% at 1000 W/m2 (-35° to +80°C) |
Factory Calibration of Electronics | ±0.1% of reading ±0.2% of range |
Irradiance Calibration | ±1.8% (calibrated to NREL-traceable reference standard) |
Overall Measurement Uncertainty | ±2.0% of reading ±4 W/m2 |
Stability | 0.5% per year |
Mounting | 4 mounting holes with diameter 5.50 mm (0.217 in.) |
Dimensions | 115.1 x 65.0 x 30.0 mm (4.53 x 2.56 x 1.18 in.) |
Weight | 0.3 kg (0.6 lb) |
Digital |
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Communications Protocols | Modbus over RS-485, user-settable Modbus address |
Baud Rate | Up to 57.6 kbps |
Current Consumption | Typically 8 to 15 mA |
Analog |
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Analog Output Options |
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Analog Output Signals |
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Current Consumption |
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Output Impedance | 2 kohm (0 to 1.5 V or 0 to 10 V mode) |
Internal Voltage Drop | Allow 3.5 V minimum (4 to 20 mA mode) |
The CS325DM requires an RS-485 adapter if the data logger it is being used with does not support RS-485.
Two CR1000X data logger programs that read the CS325DM measurements. An example program is included for each output option (digital Modbus, analog). Program code for other data logger models will be similar.