VXI VT1422A - Manual (Page 451)

Specifications 449 Appendix A
VT1529A/B Specifications
General:
VT1529A/B outputs: Single static output from 32:1 multiplexer
32 individually buffered dynamic outputs
Bridge completion:
120, 350
Ω and user installed,
program selectable
Bridge configurations: Full, half and quarter
Remote operation: 330 m (1000 ft) from multiplexed output
100 m (300 ft) from buffered outputs
Bridge excitation: User-supplied excitation in 8-channel banks
Linearization: Mx+b on all channels
Calibration: Internal self-calibration source 50 k
Ω and
user-installed shunt calibration resistor,
program selectable
Measurement rate: 25 kSamples/s via multiplexed output, up to
196 kSamples/s dynamic
Static (multiplexed) outputs:
Gain (VT1529A/B only)
Gain (VT1529A/B + VT1422A)
Resolution (1 LSB @ VT1422A)
32 V per V
5000 V per V
0.06 mV (subject to rms noise limits)
Recommended measurement products:
Static strain measurements
Dynamic strain measurements
Note: Companion products listed below are
VXI-based. Twelve measurement module slots
are typically available in systems using
VXI Technology’s CT-400 VXI mainframe.
VT1422A Remote Channel DAC Module
plus up to eight VT1539A SCPs
VT1432A 16 Chan 51.2 kSamples/s Digitizer
VT1433A 8 Chan 196 kSamples/s Digitizer
Bridge Specifications
Completion resistors:
Values
Power
120/350
Ω ± 0.05%, ±5 ppm/°C TC
0.125W @ 125 °C
Shunt cal resistor: 50 kOhm ±0.1%, ±25 ppm/°C TC
Quarter bridge offset: 3 microstrain (±2 mV), ±4 °C of tare cal
Excitation sense & high-level DCV:
Maximum input
Gain accuracy
Offset
±8 V dc (16 V centered about Gnd terminal)
±0.01% of reading
<1 mV
Strain Measurement (Combined
VT1422A + VT1529A/B)
Measurement range (
μ ∈)
(Quarter bridge, ±5 V excitation):
±200,000
±50,000
±12,500
±3,125 Resolution (
μ ∈)
6.1
1.5
0.4
0.1
rms noise (
μ ∈)
0.4
0.4
0.4
0.4 (noise can be
reduced by averaging)
System accuracy: Note: After CAL routine, 1 hour warm-up, ±1 °C