Introduction
The AMPBOX is a signal amplifier designed for Kipp & Zonen solar radiation radiometers, which are passive instruments generating low voltage outputs. The AMPBOX converts these outputs to a 4 to 20 mA current loop signal, suitable for industry-standard applications and long cable runs.

Applications
AMPBOX is used in solar energy and industrial applications where direct instrument output is incompatible with data acquisition systems. It supports long cable installations and reduces interference in noisy environments. The device is weather-proof, making it suitable for outdoor use.

Features
- Galvanically isolated input and output to minimize feedback.
- Powered by the 4 to 20 mA current loop, requiring power from the data acquisition system.
- IP66 rated for outdoor installation.
- Easy connection via cable glands and internal screw terminals.
- Can be configured for specific radiometer sensitivity.

Specifications
- Current output range: 4-20 mA
- Input voltage range: -12 mV to +150 mV
- Standard gain: 2 mV / 1 mA
- Adjustable gain for specific radiometers
- Input impedance: 10 MΩ
- Operating temperature: -40°C to +85°C
- Maximum supply voltage: 35 VDC
- Voltage drop: 7.2 VDC
- Ingress protection: IP66
- Temperature dependence of gain: ± 0.01 % of span/K
- Zero drift: < ±1 µV/K
- Non-linearity: < 0.2 %
- Update time: 440 ms
- Inaccuracy: ± 0.05 % of span or ± 10 µV
- Dimensions: 64 x 98 x 34 mm
- Weight: 0.25 kg
- Cable diameters: 3 to 7 mm

Conclusion
The AMPBOX is a robust and versatile amplifier ideal for enhancing the functionality of Kipp & Zonen radiometers, providing reliable performance in various environmental conditions.