4 Channels, 28-90 Vrms Input, 47 Hz-1 kHz
A linear variable differential transformer (LVDT) is a type of electrical transformer/transducer used for measuring linear displacement (position). A counterpart to this device used for measuring rotary displacement is called a rotary variable differential transformer (RVDT). The RVDT is like an LVDT in that it measures a positional displacement, however, the displacement, which is still a linear proportional function, is based on rotary instead of linear positional movement.
Both types provide output signals (voltages) as a proportional linear function based upon an AC reference source. The AC Reference source applied at the transformer primary winding causes a magnetic flux generated on the transformer secondary windings by a moveable core, which causes output signal(s) proportional to the linear displacement position being gauged.
With isolated excitation and signal input covering 2, 3, or 4-wire transducer interfaces and a normalized digital position word based on a percentage of full-scale travel, these modules can interface to virtually any type LVDT or RVDT transformer.
- Signal, reference and frequency measurements
- Signal under-voltage and over-voltage detection
- Reference under-voltage and over-voltage detection
- Support an optional, programmable AC excitation supply
- All channels have continuous background Built-In-Test (BIT)
- Extended LVDT FIFO buffering capabilities for greater incoming data storage/management
- Programmable FIFO buffer thresholds
- Resolution: 24-bit
- Input Format: Linear Variable Differential Transformer (LVDT), Rotary Variable Differential Transformer (RVDT), 2, 3, or 4-wire programmable
- Input Voltage: 28-90 Vrms
- Reference Voltage: 2 - 115 Vrms
- Input Impedance: 300 kΩ
- Accuracy: ±0.025% FS 3-wire or 4-wire and 2-wire w/ compensated phase, ±0.050% FS for 2-wire, uncompensated phase
- Bandwidth: Default factory setting is 40 Hz. Bandwidth is field programmable on a per channel basis. User must program all parameters for each boot up, or parameter will be set to the default value.
- Frequency Range: 47 Hz-1 kHz
- Phase Shift: Automatically compensates for phase shifts between the transducer excitation and output up to ±60° (3 and 4-wire configurations). Programmable fixed compensation is provided for 2-wire configurations.
- Self-Test: Built-in wraparound self-test.
- Power: 5 VDC @ 1 A
- Ground: Isolated signal and excitation. Channels individually isolated from each other and from system ground.
- Weight: 2.5 oz. (71 g)
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