ABB Vertical Measurement PFCL 201 Pressure Transducer Pillow Block Load Cells

Load cells are machined from a single piece of stainless steel. The load cell is machined directly onto the steel piece and is positioned so that it is sensitive to forces in the direction of measurement and insensitive to forces in other directions.

The load cell is mounted to the base with four screws and the bearing housing is mounted to the top of the load cell with four screws.

Each load cell is calibrated and temperature compensated.

The load cells PFCL 201C/201CE/201CD are available in four measuring ranges and all models have the same external dimensions.

The load cell PFCL 201C is equipped with connectors for plugging and unplugging the connection cable.

The load cell PFCL 201CE is equipped with a connection cable with protective hose.

Load cell PFCL 201CD with acid-proof cable gland and PTFE insulated connecting cable.

Repeatability error

Repeatability error is the maximum deviation between repeated readings under identical conditions. It is expressed as a percentage of the sensitivity at rated load.

Compensation Temperature Range

The temperature drift of a load cell is compensated for over a specific temperature range. This is the temperature range over which the load cell maintains the specified allowable temperature drift (i.e. zero drift and sensitivity drift).

Operating Temperature Range

The operating temperature range is the temperature range over which the load cell can operate within the specified accuracy. The load cell's maximum allowable temperature drift (i.e. zero drift and sensitivity drift) does not necessarily remain constant throughout the operating temperature range.

Storage Temperature Range

The storage temperature range is the temperature range over which the load cell can be stored.

Zero Drift with Temperature

Zero drift is the variation of the sensitivity-related signal with temperature when the load cell is at zero load.

Sensitivity Drift with Temperature

Sensitivity drift is the variation of the signal with temperature, related to sensitivity, excluding zero drift, at rated load.

Compression

Compression is the total reduction in load cell height when the load is increased from zero to the rated value. The total reduction of the load cell height when increasing from zero to the rated value.

Measuring principle of the load cell

The measuring principle of the load cell is based on the Pressductor® technology and the fact that the magnetic permeability of magnetic materials changes under mechanical stress.

The load cell is a thin film machined on the load cell. The primary and secondary windings are wound at right angles through four holes in the load cell.

The primary winding is powered by alternating current, which generates a magnetic field around the primary winding. Since the two windings are wound at right angles to each other, no magnetic field is generated around the secondary winding as long as there is no load on the load cell.

When the sensor is subjected to a mechanical force in the measuring direction, the propagation of the magnetic field changes to encircle the secondary winding, generating an alternating voltage in this winding.

The control unit converts this alternating voltage into a DC voltage proportional to the external force. If the measuring force changes direction, the sensor signal also changes polarity.

Mounting arrangement

When choosing a mounting arrangement, it is important to remember to place the load cell in a direction that provides sufficient measuring force (FR) to achieve the highest possible accuracy.

There is no specific correct orientation for the load cell; it should be placed in the direction best suited to the application, taking into account the location of the screw holes. It is also possible to mount the load cell by suspending the roll below the load cell.

The load cell has the same sensitivity in tension and compression, so the load cell can be mounted in the easiest way possible.

Typical mounting methods are horizontal and inclined mounting.