Understanding calibration management terms
| Term | Definition |
|---|---|
| Alert Tolerance | Indicates a reading that is acceptable, but
is closer to the device tolerance limits than desired. Alert tolerances fall
within device tolerance limits and are always calculated as a percentage value.
The system calculates the lower and upper alert tolerances based on the following equations: Lower Work Order Alert Tolerance = Standard – [(Alert Tolerance / 100) * (Standard – Lower Equipment Device Tolerance)] Upper Work Order Alert Tolerance = Standard + [Alert Tolerance / 100) * (Upper Equipment Device Tolerance – Standard)] |
| Absolute | Indicates the system should process the
values entered in
Device Tolerance as
absolute values.
The system calculates the range at which the work order will pass or fail based on the following equations: Lower Work Order Device Tolerance = Standard – Lower Equipment Device Tolerance Upper Work Order Device Tolerance = Standard + Upper Equipment Device Tolerance For example, if the Standard is 25, and the Device Tolerance of the equipment is 5-5, the reading must fall within a range of 20 to 30 for the work order to pass. |
| Default set | The default set of calibration test points that apply to calibration work orders/PM work orders |
| Deviation | The difference between the Device Reading and the Standard |
| Device tolerance | The allowable deviation from the standard for the device being used to perform the calibration measurement. A specified device tolerance indicates the range of variation permitted in maintaining adherence to the standard for the device. |
| Increment | The increment specifies the numeric interval of which a device reading must be evenly divisible. For example, if you specify an Increment of 5, you must enter a Device Reading that is evenly divisible by 5, such as 0, 5, 10, 15, 20, 25, etc. |
| Instrument type | A series of one or more instruments requiring
and/or used for calibration that are linked together.
Standard applied to—An instrument to which a standard is applied during calibration. Accessory—An instrument that is secondary or subordinate within a loop. Reading taken from—An instrument from which a reading is taken during calibration. |
| Loop | A series of one or more instruments requiring and/or used for calibration that are linked together. |
| Output | The reading or measurement produced by the
calibration measurement at a calibration point.
The output can also be the expected reading if the output unit of measure is different from the input unit of measure. |
| Output range | The allowable deviation from the standard for the output that indicates the range of variation permitted to adhere to the standard for the test point. |
| Percentage | Indicates the system processes the values
entered in
Device Tolerance as
percentages.
The system calculates the range at which the work order will pass or fail based on the following equations: Lower Work Order Device Tolerance = Standard – [Standard * Lower Equipment Device Tolerance / 100] Upper Work Order Device Tolerance = Standard + [Standards * Upper Equipment Device Tolerance / 100] For example, if the Standard is 25, and the Device Tolerance of the equipment is 5-5, the reading must fall within a range of 23.75 to 26.25 for the work order to pass. |
| Precision | Indicates the maximum number of decimals
allowed to the right of the decimal point for a reading.
Note: You can enter a number with fewer than the maximum number
of decimals allowed to the right of the decimal point. The system assumes there
are zeros at the end of the specified number.
The precision indicates the degree of refinement with which the calibration is performed or the calibration measurement is stated. |
| Process range | The reading or measurement produced by the calibration measurement process at a calibration point |
| Process tolerance | The allowable deviation from the standard for the process that indicates the range of variation permitted to adhere to the standard for the test point |
| Sequence | Indicates the order in which the test points should be calibrated |
| Set | A number assigned to identify a group of test points |
| Standard | The ideal reading for a piece of equipment
against which actual readings should be measured.
Standard also refers to the parts used to perform a calibration. |
| Test point | The actual point (calibration point) at which the accuracy of the equipment is tested to the known standard. A piece of equipment that requires calibration may consist of numerous test points. |
| Test point range | The numeric values indicating the acceptable range for the test point, e.g., 10 to 20. The values identify the upper and lower limits of the standard for the test point. The test point reading must fall within this range for the test point to pass. |