The AP6050 LVDT Conditioning Module provided synchronous demodulation and conditioner for Linear Variable Differential Transformer (LVDT) transducers used in the control, display, and recording of motion. The AP6050 LVDT  Transmitter provides the AC sine wave excitation (adjustable from 6-10Vp-p nominally 4kHz) for LVDT operation. The module transmits a DC voltage or current output proportional to the motion applied to the input transducer.

Zero and span are factory set, but may be field adjusted (the LVDT is assumed to be previously calibrated). Zero is adjusted for a zero output with the LVDT at its mechanical null, or zero displacement position. Span is adjusted for a full scale output with the LVDT at its appropriate mechanical extreme, or full displacement position. Zero and span are each screwdriver adjustable and accessible through the top cover of the module.

ZERO AND SPAN ADJUSTMENTS

Zero and span are factory set, but may be field adjusted (the LVDT is assumed to be previously calibrated). Zero is adjusted for a zero output with the LVDT at its mechanical null, or zero displacement position. Span is adjusted for a full scale output with the LVDT at its appropriate mechanical extreme, or full displacement position.

Zero and span are each screwdriver adjustable and accessible through the top cover of the module.

EXCITATION ADJUSTMENT

If zero and span adjustments cannot calibrate the output span appropriate to the LVDT travel input signal, roughly center zero and span adjustments and set EXC as needed to boost or decrease the LVDT's full travel signal for zero and span calibration.

SPECIFICATIONS

Input (AC p-p)

20mV/V to 1V/V

Input Impedance

 >100KÙ

Excitation

• Adjustable 6-10V p-p (4KHz)

• Drives 250Ù @8V p-p

Output Ripple

<0.2% of span p-p

Output Impedance

• Voltage: <10Ù

• Current: >100KÙ

Output Drive

• Voltage Output: 10mA, max (1KÙ, max)

• Voltage Output (bipolar): 2mA, max

• Current Output: 12V compliance @ 20mA (600Ù, max)

Adjustments (Zero, Span)

Factory-set at zero and full scale, to within 0.5% of span, typical (adjustment range to 10 % of span to either side of factory-setting, typical).