AFL-1000
OPTICALLY ISOLATED
REMOTE DATA ACQUISITION SYSTEM

The AFL-1000 is a high performance, remote controlled, signal conditioner, built into an optically isolated data acquisition system, used for acquiring analog data from up to 16 inputs, at a 14 bit resolution, with simultaneous sampling of up to 16 input channels at up to 90 kHz per channel.

The AFL-1000 is primarily designed for acquiring dynamic and static data from low-level transducers as Strain-Gages, pressure sensors, and other bridge type sensors as well as voltage producing devices: Piezo sensors, Temperature sensors, Photo diodes and EEG/DLG inputs. The unit contains a high stability symmetrical excitation circuit with fixed and variable controls and a high resolution data acquisition system, mainly designed for acquiring dynamic and static data at 93 kHz per channel, with simultaneous sampling.

The AFL-1000 consists of two parts:
  PC interface card (see photo below),
  Data acquisition unit (shown above, two options).

Both parts are interconnected via an RS-232 interface (for system initialization) and an optical fiber. The data acquisition unit is a stand alone unit, operated from a single +5V power supply. It can also run on batteries. It can be placed at a distance of up to 12 Km (0.63 mile) from the host PC compatible computer. The PC interface card, with its accompanied software, will save the samples to your hard drive. This interface card contains an onboard FIFO buffer, in sizes of 128K - 2048K, that allows you to sample at the maximum rate, independently of the host speed.

The optical isolation between the measuring unit and the host PC is ideal for acquiring low level signal, in industrial and medical applications, since it eliminates ground-loop problems, and no noise is transferred to the measurement system caused by long cables or noise generated from the power supply of the PC.
This unit is guaranteed to have noise levels of less than ±1 LSB. By removing a switch on the back panel, you may switch the channels to a general purpose data acquisition system with an input range of ±3V or ±10V, for connecting to other analog instruments.

The AFL-1000 is supported by DOS software, capable of showing the signals in real time, changing the sampling rate selecting ext. trigger and clock and acquiring data files. The system comes with a software driver for National Instrument's "LAB WINDOWS" software, thus enabling the user to control and sample ta from this unit, as well as from other laboratory instrumentation (oscilloscope, D/A-A/D cards, digital I/O, function generators etc.)

Up to 8 units of the AFL-1000 may be connected to a single PC computer, for configurations of up to 128 channels.

There are two optional input modules for the AFL-1000, from which you select according to your specific application (see pictures above).

  A high performance, remote, optically isolated data acquisition system.

  Up to 16 input channels, at 14 bit resolution.
  Simultaneous sampling at up to 90 kHz per channel.
  A data acquisition unit can be positioned at up to 1 Km away from the host PC, connected via standard optical fiber.
  Built-in buffer for burst sampling: 128K standard; option for up to 2048K.

  Sampling at places with high voltage potentials relative to ground (such as antennas).
  Supersonic wind tunnel data acquisition - no need to rewire ducts - only a single fiber.
  Rotating systems - data acquisition system can be rotated 360 degrees, at any speed, using our proprietary optical bearing (fiber optic rotary joint).
  Data acquisition at inaccessible places (dangerous experiments, underwater, pressure chambers, etc.)

  Sampling Rate: 100 Hz - 90 kHz per channel.
  Resolution: 14-bit A/D converters.
  Sampling Method: Simultaneous Sampling.
  Optical Fiber Length: up to 1.2 Km.
  RS-232 Interface: up to 19,200 baud, 7/8 bits.
  Analog Input Range: ±10V standard, ±3V per request.
  Input Resistance: 10 kOhms to GND.
  Input Capacitance: 22 pF.
  Power Supply: 5V ±5%, Mains adapter/Battery adapter.
  Current Consumption: 0.5A + 0.1A/module.

   Spectral noise density: 4 nV/ (Sq.root)Hz.
  Bias currents: less than 20 nA.
  Input offset voltage drift: 0.25 microVolt/deg.C.
  Input resistance: more than 100 MOhm.
  Common mode rejection: 120 dB.

  Gain:
Fixed gain settings: 50, 100, 200, 500, 1000 or 2000,
Fixed gain accuracy: 0.01% of the nominal value.
  Linearity: better than 0.002%.
  Variable gain linearity: better than 1% f.s.
  Frequency response: better than 70 kHz (-3dB, G=500).
  Common mode voltage: ±10Volts.
  Stability: ±1 microVolt/deg.C. RTI.

EXCITATION
   5 fixed levels: 3V, 5V, 9V, 12V, 18V (other levels available per request).
  Continuously adjustable range: 2-20V.
  Current: 0-100 mA.
Short - circuit current: 180mA Max.
  Load regulation:
  - Normal: ±0.2 mV ±0.03%,
  - With option 09: ±0.3mV ±0.04%.
  (All the above is specified for ±10% line voltage variations).
  Temperature stability: 0.005%/deg.C max. (50 ppm/deg.C max.).
  Short circuit protection.
  Excitation level: symmetrical about ground.

BRIDGE
Bridge Compensation resistors:
1/4 Bridge, 120 Ohm.
1/2 Bridge, 120 Ohm.
1/4 Bridge, 350 Ohm.
1/2 Bridge, 350 Ohm.
Full bridge - any sensor.
Bridge completion resistors accuracy: 0.1%, 25 ppm/deg.C.

FILTERING
  Type: Butterworth Low-Pass Filter.
  DC-100 Hz 4 poles (24 dB/octave rejection).
  DC-500 Hz 4 poles (24 dB/octave rejection).
  DC-1 kHz 4 poles (24 dB/octave rejection).
  DC-2 kHz 4 poles (24 dB/octave rejection).
  DC-5 kHz 4 poles (24 dB/octave rejection).
Please consult factory concerning other filter modules.

AMPLIFIER OUTPUT
  Short-circuit protected
  Normal output level: ±12 volts.
  Maximum output current: 50 mA.

POWER
  Voltage Rating: 105 to 125V, or 210 to 240V, 50/60 Hz (switchable on rear panel).
  Max. power consumption: 100 Watts.

  Programmable Gain: 1, 2, 5, 20, 50 and 100.
  Differential input, with Preamplifier gain up to 1000.

For more information please contact us:

Head Office: 33 Hayetzira St., Ramat-Gan 52521, ISRAEL. Tel: 972-3-5756327, Fax: 972-3-5756326
USA office: 9 Blossom drive, Kennett Square, PA19348.  Tel: (302)478-2881 Fax: (610)444-5544

Please note: New USA address and new fax number.
E-mail: info@lab-systems.com