SMP3 Kipp & Zonen Smart Pyranometer
RS-485 Modbus® RTU interface
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Overview

Kipp & Zonen's SMP3 is a smart pyranometer with low maintenance and industry standard digital and analogue amplified outputs. Based on the proven CMP 3 technology the SMP3 adds Modbus® interface, improved response time and temperature corrected measurement data. The wide and low power supply range from 5 to 30 VDC makes integration in meteorological stations easy.

The SMP is protected against over voltage, reversed polarity and short circuiting. Because all SMP’s have identical sensitivity and connections exchanging instruments during recalibration is easy. SMP3 measures global solar radiation on a horizontal plane. When tilted with the same angle as a PV panel it measures the tilted global radiation, for PV module efficiency calculations.  

PC Software for data logging, display of data and MODBUS® address setting is provided.

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Benefits and Features

  • RS-485 MODBUS® RTU interface
  • Wide operating temperature range (-40° to +80°C)

The "-L" on a product model indicates that the cable length is specified at the time of order.

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Detailed Description

The SMP3 is a smart pyranometer with low maintenance and industry standard digital and analogue amplified outputs. Based on the proven CMP3 technology the SMP3 adds Modbus® interface, improved response time and temperature corrected measurement data. The wide and low power supply range from 5 to 30 VDC makes integration in meteorological stations easy.

The SMP is protected against over voltage, reversed polarity and short circuiting. Because all SMP’s have identical sensitivity and connections exchanging instruments during recalibration is easy. SMP3 measures global solar radiation on a horizontal plane. When tilted with the same angle as a PV panel it measures the tilted global radiation, for PV module efficiency calculations.

PC Software for data logging, display of data and MODBUS® address setting is provided.

Specifications

  • Spectral range: 300 to 2800 nm 
  • Response time: (63%) < 1.5 s 
  • Response time: (95%) < 12 s 
  • Zero offset A: < 15 W/m² 
  • Zero offset B: < 5 W/m² 
  • Directional error (up to 80 ° with 1000 W/m² beam): 20 W/m² 
  • Temperature dependence of sensitivity (-20 ºC to +50 ºC): < 3 % 
  • Analogue outputs: 
    • 0 to 1 V (-V version)
    • 4 to 20 mA (-A version)
  • Digital output: 2-wire RS-485
  • Warranty: 2 years

Compatibility

Mounting

The SMP3 includes a bubble level and adjusting leveling screws, which allow the sensor to be leveled without using a leveling base. The 015 Mounting Arm can be used to mount the sensor to a mast or the CM225 Solar Sensor Mounting Stand can be used to attach the sensor to a mast, crossarm, or pole (1.0-in. to 2.1-in. outer diameter). The CM225 consists of rectangular plate, mounting bracket, U-bolts, lock washers, and nuts.

Alternatively, the CM245 Adjustable Angle Mounting Stand may be used. It includes slots that can be adjusted to any angle from horizontal to vertical. The L27084 can also be used to mount a pyranometer housed inside of the CVF4 heater/ventilator.

Interface

In order to make use of the RS485 Modbus output the MD485 interface is required.

Datalogger Considerations

Compatible Contemporary Dataloggers

CR200(X) Series CR800/CR850 CR1000 CR3000 CR5000 CR6 CR7X CR9000X