Transfer of Measurement and Counter Readings 
Transfer of Measurement and Counter Readings
Use
This function comprises the following types of transfer:
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 readings determined for the swimming pool are copied from the measuring point of the pump, since this value also concerns the pump: the greater the concentration of chlorine in the water, the greater the risk of corrosion to the pump.
A passenger airplane is represented in the system as a functional location. The starts 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 starts and landings.
The counter that counts the number of starts and landings for the airplane copies the counter reading difference to the counter that counts the starts and landings for the tires. This might appear as follows:
Airplane counter: |
Total counter reading on March 12 2000: |
New counter reading entered on March 12 2000: |
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Landing gear counter for tires: |
Total counter reading on March 12 2000: |
New total counter reading on March 12 2000: |
Prerequisites
A measurement or counter reading transfer can only be performed under the following circumstances:
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.
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.
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).
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 MeasReadTransf. Copying 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.
You can also set the indicator MeasReadTransf. Copying 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.
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 with respect to time. Depending on the key date, you can display both historical and current transfer dependencies. There are two different display forms: