Owner's manual

LDX-3A

5.0: Setting up the Transducer and LDX-3A (continued)

M-1633/0905

STEP 4 - Setting Uni-polar Full-Scale Output (adding an offset)

1. Move the transducer to the null position. LDX-3A output will be 0V or 0mA.

2. Apply offset using the +VE, -VE, 5V and 10V links and then adjust the Fine Offset control to set the offset precisely.

3. Perform final checks, step 5.

Example: 0-10V is required for a ±1mm transducer. Set the transducer to give ±5V over the full range and then, with the

transducer at null, add +5V offset. Adjust the Fine Offset control to give 5V. When the transducer is moved to the +1mm

position, the output will be +10V.

Example: 4-20mA is required for a ±1mm transducer. Set the transducer to give ±8mA over the full range and then, with

the transducer at null, add +2.5V (approx. 5mA) offset. Adjust the Fine Offset control to give +12mA. When the

transducer is moved to the +1mm position, the output will be +20mA.

STEP 5 - Final Checks

Ensure that the calibration is correct by moving the transducer across the required mechanical range, checking

calibration points. Fine adjustment can be made if required.

It may only be possible to set the output accurately at the two calibration points. This is due to non-linearity within the

transducer.

5.2: Basic Procedure