Gefran VDA168-H Data Sheet
VDA168-H
VARIABLE DIGITAL AMPLIFIER 168
Main features
• Dynamic and static applications
• Used for any kind of strain gage sensors
• Digital amplified output from 0...±10VDC
• High resolutions (24-Bit ADC, 16-Bit DAC)
• Quick plug-in sensor and measure
• Fast and easy self-calibration
• Very rugged aluminium housing (IP62)
This digital amplifier measures at the strain gage bridge
eight times per millisecond which gives a high oversampling range.
This gives a stable signal output with high accuracy and
reproducibility. The digitalised signal can be trensformed
into various outputs
TECHNICAL DATA
Input Bridge resistance 120...1000Ω
Signal input range (FS) 0.1...3mV/V
Span adjustment ±200% FS
Zero adjustment ±500% FS
Resolution ADC 24-Bit
Resolution DAC 16-Bit
Sampling rate 8kHz
Output rate 800Hz
Low-pass lter 100Hz
Output signal 0...±10VDC, 4...20mA
Noise < 10mV
Accuracy < ± 0.2% FS
Accuracy of zero point < ± 0.1% FS
Linearity < ± 0.02% FS
Output resistance 10Ω
Reset time > 25ms
Reset voltage 15...28VDC, 0VDC
Supply voltage 20...28VDC
Supply current < 60mA
Inverse polarity protection Yes
Accidental short-circuit protection Yes
Operating temperatur range -10...+70°C
Storage temperatur range -10...+70°C
Temperature coefcient at 10°C < 0.1 (0.05 typical)
Protection class IP62
EMC 2014/30/EU
Case material Aluminium
Weight 260g
MECHANICAL DIMENSIONS
RESET FUNCTIONS
24V -TYPE
0V - TYPE
Reset control input
Minimum reset pulse duration >25ms
Reset 15...28 V
Operate 0V/open
Reset control input
Minimum reset pulse duration >25ms
Reset 0V
Operate 5...28V/open
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