Introduction: The GAGE 3000 is a High Quality Interface Board, used for interfacing any bridge type Transducer such as Strain Gages, Pressure Sensors and other bridge-type Transducers, as well as Voltage Producing devices such as Piezo Sensors, Temperature Sensors, Photo Diodes and EEG/ECG Inputs.

Actual Size: 70.5 X 30.5mm

The GAGE 3000 provides a Variable Excitation, capable of driving upto 80mA, at Voltage Range of 1V to 20V. The Excitation Voltage is Symmetrical about Ground Level, so that the Common Mode Voltage is approx. 0V. For example: an Excitation Voltage of 12V will be ±6V relative to ground. The GAGE 3000 can be configured as a Single Board for One Transducer or upto Six Transducers on a Single Board.

The GAGE 3000 also contains an Instrumentation Amplifier, with a Variable Gain of 200 - 1500, and a Variable Offset Control. The Output of the Instrumentation Amplifier is fed to a Double Pole Low-Pass-Filter, then passed via a Driver Buffer to the Output Port. The cut-off Frequency of the Low-Pass-Filter may be changed by replacing Two Capacitors, CX1 and CX2, with Capacitors of Other Values. The following Table provides Capacitor Values for some often used cut-off Frequencies:

Cut-Off Freq.	50Hz	100Hz	200Hz	500Hz	1kHz	2kHz	5kHz	10kHz	20kHz
Capacitor Value CX1/CX2	330nF	150nF	80nF	33nF	15nF	8nF	3.3nF	1.5nF	1nF

The GAGE - 3000 also has a Bridge Loading Resistor Rx, connected in Series with a Variable Trimpot (Variable Resistor) designated P2. The Resistor is used for Correcting the Offset of a Bridge, which has a High Offset Level that cannot be Corrected by using the On-board Offset Control. This Resistor has to be defined and connected by the user. Please note that this Resistor may affect the Linearity of the Sensor, therefore it is recommended to Correct the High Offset by Fixing the Transducer.

The Excitation of the GAGE - 3000 may be changed by using a trimpot designated P6, while the Excitation Level may be measured between the -EXC and +EXC test points. The Gain is adjusted using P1.

The GAGE - 3000 requires an External Stabilized Power Supply of Â±8V to Â±15V. We offer an Optional Battery Power Supply that works from a 12V battery.

Block Diagram:

Features:
For use with any bridge-type Transducers, Pressure Gages, Strain Gages, etc.
High Gain - 1,500 Standard, upto 20,000 Optional
Ultra-High Input Impedance: 1GW
High Frequency Response: upto 120kHz
Built-in User Programmable Low Pass Filter
Built-in Excitation
High Common Mode Rejection - 115dB min.
Low Noise, Low Offset and Drift
Low Cost

Applications:
Weighing Systems
Interfacing of Load Cells to A/D cards
Amplification of Low-level Sensors
(Pressure Transducers, Light-sensing Devices, Thermistors, etc.)
Medical Applications: EEG, ECG, etc.

Specifications:

Parameter	Value
Gain:	100 - 1500 (adjustable by user) upto 10,000 - by request
Gain Non-Linearity:	±0.002%
Gain Temp. Coeff:	5ppm/°C
Input Offset Drift:	1µV/°C
Output Offset Drift:	25µV/°C
Input Offset Vs. Supply:	85dB
Input Impedance:	1GΩ
Diff. Capacitance:	5pF
CMRR (DC - 100Hz):	100dB
Bandwidth (Gain 100 - 1000):	20kHz Min. (-3dB)
Setting time to 0.01%:	80 µSec.
Input Noise Voltage (@1 kHz):	5nV/√Hz
Output Noise:	100 nV/√Hz
Supply Voltage Range:	±8V to ±15V
Excitation Level:	±1V to ±10V
Excitation Current (Max.):	80mA
Excitation Drift:	15ppm/°C ±10µV/°C
Excitation Noise (DC - 100kHz):	0.6mV max (@300R load)
Excitation Noise (DC - 1kHz):	0.2mV max (@300R load)
Operating Temperature:	0 - 70°C
Bridge Resistance Range:	50Ω - 20,000Ω

All Specifications are subject to change without a Prior Notice

For any sort of clarifications kindly contact:
info@globesolutionz.com