DATA ACQUISITION

Although the Eppley Laboratory does not manufacture Dataloggers, Eppley does manufacture some basic data acquisition instruments such as various Integrators, an Instantaneous Handheld Readout and an Amplifier.

Electronic Integrators, Models 412, 415

The Electronic Integrators accept the radiometer’s millivolt output and converts it to an output pulse which is counted and totaled to produce the integral of the input signal. Adjustable to radiometer sensitivity, the integrator can display, on a counter or on a printer tape, the total energy received per unit area in watt-hours/meter2, BTU/feet2, or other requested settings.

Models:

412: Single channel, mechanical counter
412-2: Double channel, mechanical counter
412-2-6630: Double channel, LCD counters and printer
415-6630: Single channel, LED counter and printer

Various output interface option are available:

Model 412
  • 5 Digit Parrallel Binary Coded Decimal (BCD) Counter
  • 16 Bit Binary Counter
  • RS-232 Interface
Model 415
  • 5 Digit Parrallel Binary Coded Decimal (BCD) Counter
  • RS-232 Interface
  • Analog output of the digital integrated data, D/A

Instantaneous Readout, Model 455

The Instantaneous Readout is used with Eppley pyranometers and pyrheliometers to give present solar values. This meter is scaled to the sensitivity of a particular instrument to read out directly in the Standard International engineering units of watts/meter2 unless otherwise specified.

The unit is powered with either a 9V rechargeable nickel cadmium battery (approximately eight hours) or a 115V/220V AC battery eliminator (provided). The system employs a chopper stabilized pre-amplifier with low long term and temperature drift specifications coupled with a low noise 3.5 digit A/D converter.

Amplifier, Model 450

The Eppley Amplifier employs a precision instrumentation amplifier with differential inputs making it ideal for accurate amplification of low-level signal in the presence of large common-mode voltages. A gain of 1 to 1000 (300 is usually used to increase radiometer’s millivolt output to 0-5 volt full-scale).