Certain meters can have elements in addition to those described in Meter Common Elements. There are three special elements.
Differential Indicator
The delta symbol (Δ) is used for temperature and pressure meters to indicate when a differential reading is being displayed. It is a static element which is enabled at configuration and is not connected to the control system. It consists of a simple triangle shape which is placed next to the meter.
Descriptor
The Miscellaneous, Deviation, and Analyzer meters can all be used to show many different types of readings. Therefore, it is recommended that short text (up to 3 characters) is provided to help identify the reading (e.g., “O2” for Oxygen content, “SG” for density, “Vis” for viscosity, “Trq” for torque, etc.) .
Clock Timer
Connects to: EquipmentName.Timer, EquipmentName.TimerEXP
The clock timer is an independent object that is integrated with Analyzer meters. It can be used in cases where the analyzer shows an intermittent sample reading. For these types of readings, the Clock Timer provides an indication of how long ago the value was updated. This helps operators to understand how current the value is. If the analyzer reads continuously the clock timer is not shown.
See Also
Published June 2018