Transfer of Measurement and Counter Readings

Use

This function comprises the following types of transfer:

  • Measurement reading transfer from one measuring point to another (1:1 relationship)

    Example Example

    The proportion of chlorine in the water of a swimming pool is measured on a regular basis. To do this, water samples are taken from the pool, and the measurement readings determined are entered for the measuring point that has been created in the system for the pool.

    A measuring point has also been created for the swimming pool’s circulation pump, for which the chlorine content of the water is also relevant. The measurement values determined for the swimming pool are copied from the measuring point of the pump, as this value also affects the pump. The corrosion danger for the pump rises with a high concentration of chlorine in the water.

    End of the example.

  • Measurement reading transfer from one measuring point to several others (1:n relationship)

  • Counter reading transfer from one counter to another (1:1 relationship)

  • Counter reading transfer from one counter to several others (1:n relationship)

Example Example

A passenger airplane is represented in the system as a functional location. The take-offs and landings are counted for the airplane, since certain maintenance tasks are dependent on the number of times the airplane takes off and lands.

The tires of the undercarriage are represented on one of the lower levels of the functional location. The tires must be changed after a certain number of take-offs and landings.

The counter that counts the number of take-offs and landings for the airplane copies the counter reading difference to the counter that counts the take-offs and landings for the tires. This might appear as follows:

End of the example.

Overall counter reading on the 12.02.2010:

Newly recorded counter reading on the 20.02.2010:

Airplane counter:

350 take-offs and landings

360 take-offs and landings

Difference of 10 take-offs and landings copied

Undercarriage counter for tires:

Overall counter reading on the 12.02.2010:

20 take-offs and landings

New total counter reading on 20.02.2010:

30 take-offs and landings

When transferring measurement values and counter readings, you can work with so-called interval documents. For more information, see Generation of Interval Documents.

Prerequisites

A measurement or counter reading transfer can only be performed under the following circumstances:

  • Measurement readings can only be transferred from one measuring point to another, if both measuring points have the same characteristic and counter readings can only be transferred from one counter to another, if both counters have the same characteristic.

    Each measuring point or counter has a classification characteristic that is valid for all objects. Characteristics are used to enable measuring points or counters to be compared across all objects, so that you can define, for example, whether this involves a kilometer counter for a car or an operating-hours counter for a cooling compressor.

  • You can only transfer measurement and counter readings within an object hierarchy. Measurement or counter readings cannot be transferred from other object hierarchies.

    Within a hierarchy, you can only transfer measurement or counter readings in a straight line from above or from below; you cannot copy them from another branch.

Example Example

End of the example.

You can only transfer measurement or counter readings within the structure of the functional location P1 and within the structure for the functional location P2. You cannot transfer, for example, the piece of equipment E1 in P1 to the piece of equipment E6 in P2.

You can skip levels within a structure. For example, you can transfer from P11 to E3.

You must transfer measurement or counter readings in a straight line. For example, you can transfer from P1 to E1 or from E4 to P11, however, it is not directly possible to transfer from E1 to E4.

Special case:

A milometer has been mounted on the axle (E2) of a locomotive. The kilometers counted there are to be distributed between the entire axle and wheel sets of the train. However, it is not possible to transfer these readings directly, as it would mean transferring them diagonally within the hierarchy.

Solution:

The kilometers counted are copied to the train P1 (= copying in a straight line from the bottom to the top). The readings are then transferred from the train to the axle sets and, if necessary, to the wheel sets. Axle E2 does not, however, receive the kilometer reading again as the system checks and stops cyclical copying (if E2 was transferred to P1, P1 cannot transfer back to E2).

Key Features

Once a piece of equipment is dismantled from a structure, the system automatically interrupts the measurement reading transfer. A system message is displayed, informing you of the number of measurement readings for which the transfer procedure was interrupted. The same applies when you change the assignment of a piece of equipment to its superior piece of equipment or the assignment of a functional location to its superior functional location.

Once a piece of equipment is dismantled, the indicator MeasReadTransfer required remains. When the piece of equipment is installed again, this enables the system to recognize that a measurement reading transfer will probably be necessary. After that, the system checks the object hierarchy (from the installation point upwards) and searches for the measuring points or counters from which a transfer is possible on the basis of the same characteristic. These measuring points or counters are displayed in a proposal list, in which you can define the required measurement reading transfer.

Note Note

You can also set the indicator MeasReadTransfer required as soon as you create the piece of equipment, without having to make an assignment first. When you install the piece of equipment, the system creates the proposal list based on the characteristics that are suited to the equipment. However, the search for suitable measuring points or counters is only performed upwards in the object hierarchy.

End of the note.

This function also comprises the copying of transfer dependencies between measuring points and counters, if you copy functional location structures using the copy reference function.

If a measurement document is entered for an historical reference time, the transfer of the measurement document is performed according to the historical transfer dependencies, even if the object structure has changed in the meantime.

If you have defined transfer dependencies for measuring points and counters, you can display them in relation to time. Depending on the key date, you can display both historical and current transfer dependencies. This information can be displayed in two forms:

  • As a structure display of all technical objects for which a transfer dependency exists; the technical object with the measuring point/counter from which you called up the report is highlighted.

  • As a list display of past and current transfer dependencies for a measuring point/counter.