Microvolt precision amplifiers.

Description

These amplifiers are designed for the accurate amplification of the very small output signals of pyranometers, pyrgeometers, heatflux sensors etc. The amplifiers are reliable, maintenance free and very easy to use.

The AC-100 is a straightforward amplifier with 0...1 V output. The amplification is set with low-cost metalfilm resistors. The amplifier can be ordered with a specific amplification factor.

The AC-420 is an amplifier with 4...20 mA output. The amplifier is loop-powered, the supply current is the output signal. The amplification is set with low-cost metalfilm resistors. The amplifier can be ordered with a specific amplification factor.

Specifications and further information is listed below.

AC-100

The AC-100 is a straightforward precision microvolt amplifier for pyranometers, heat flux sensors and other sensors with a very low output signal. The AC-100 is accurate and stable. The amplification factor is adjusted with low cost metalfilm resistors. The most important features of the AC-100 are:

	ultra low offset over the temperature range
	amplification factor is set with low cost resistors
	robust, waterproof housing, suited for outdoor use
	0...1V output

The AC-100 is powered with a mains adapter. The adapter is included in the delivery.

Specifications

	AC-100
Sensors	Heat flux plates Pyranometers Net –radiometers Pyrgeometers Pyrheliometers Albedometers
Min.full scale input	+/- 3mV
Max. full scale input	1000mV
Output	-1.5...+3.5V
Amplification factor (standard)	standard not adjusted
Amplification setting	adjusted with resistors A=(100 kOhm/user resistor in kOhm) -1
Input impedance	1 MOhm
Output impedance	< 10 Ohm
Temperature range (storage)	-20 to + 50 °C
Temperature range (operating)	-30 to + 70 °C
Zero drift on the output	< 0.05 mV/°C
Full scale drift on the output	< 0.01%/°C
Initial accuracy	0.1% if factory calibrated zero: 0 +/- 0.2 mV
Power supply	8...24Vdc
Power consumption	< 20mA
Maximum output current	< 10mA
Response time	< 1 s
Dimensions	120 x 120 x 75mm
Connections	3 cable glands for 4...6mm cables
Input protection	Static discharges, reverse powering
Options and accessories	N.A.

AC-420

The AC-420 is a straightforward precision microvolt amplifier for pyranometers, heat flux sensors and other sensors with a very low output signal. The AC-420 is accurate and stable. The amplification factor is adjusted with low cost metalfilm resistors. The most important features of the AC-420 are:

	ultra low offset over the temperature range
	amplification factor is set with low cost resistors
	robust, waterproof housing, suited for outdoor use
	4...20 mA output
	loop-powered, the supply current is the output signal

The AC-420 can be powered with a mains adapter. The adapter is included in the delivery.

Specifications

	AC-420
Sensors	Heat flux plates Pyranometers Net –radiometers Pyrgeometers Pyrheliometers Albedometers
Min.full scale input	3mV
Max. full scale input	1200mV
Output	2.5...30 mA
Amplification factor (standard)	standard not adjusted
Amplification setting	adjusted with resistors A=(10/user resistor in kOhm) [mA/mV]
Input impedance	100 kOhm
Output impedance	N.A.
Temperature range (storage)	-20 to + 50 °C
Temperature range (operating)	-30 to + 70 °C
Zero drift on the output	< 0.25 uA/°C
Full scale drift on the output	< 0.01%/°C
Initial accuracy	0.1% if factory calibrated zero: 4 mA +/- 1 uA
Power supply	8...24Vdc
Power consumption	supply current is output signal
Maximum output current	approx. 43 mA
Response time	< 1 s
Dimensions	120 x 120 x 75mm
Connections	2 cable glands for 4...6mm cables
Protection	Static discharges, reverse powering. Internal fuse 100 mAT.
Options and accessories	N.A.