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Part No. 502621 Issue 10
5.0: Setting up the Transducer and OD4 (continued)
5.2: Basic Procedure (continued)
Example: ±10 VDC is required from a ±1 mm
transducer. Set the transducer to +1 mm and set
the output to 10 V.
If your transducer is known to be outside of the
standard sensitivity range, the X2 or DIV2 links will
have to be used. See section 5.3.
STEP 4 - Setting Uni-polar Full-Scale Output
(adding an offset)
1. Move the transducer to the null position.
OD4 output will be 0 V or 0 mA.
2. Apply offset using the +VE, -VE, 5 V and 10 V
links and then adjust the Fine Offset control to
set the offset precisely.
3. Perform final checks, step 5.
Example: 0-10 V is required for a ±1 mm
transducer. Set the transducer to give ±5 V over
the full range and then, with the transducer at null,
add +5 V offset. Adjust the Fine Offset control to
give 5 V. When the transducer is moved to the +1
mm position, the output will be +10 V.
Example: 4-20 mA is required for a ±1 mm
transducer. Set the transducer to give ±8 mA
over the full range and then, with the transducer
at null, add +5 V (approx. 10 mA) offset. Adjust
the Fine Offset control to give +12 mA. When the
transducer is moved to the +1 mm position, the
output will be +20 mA.
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.
5.0: Setting up the Transducer
and OD4 (continued)
