SPROCKET- 6V2120 - Caterpillar

of carbon that has a resistance. Resistance opposes the flow of current.Rheostat - This is a variable resistor. The rheostat is usually a two terminal version of the potentiometer. The rheostat is often used in applications that require a higher dissipation of power than a potentiometer. RS-232 Data Link - This is a serial data link that transfers data between electronic devices such as a personal computer and a printer. See Serial Data Link.Sample Rate - This is the rate or frequency that data is captured and/or stored. This is usually measured in samples per second.Scroll - This is the process of showing all available sets of event information within a digital display area. The information is shown one set at a time. A set of event information is shown briefly. The display will automatically advance to the next set. After all the sets are shown the process is repeated. Some controls will show the message END before the control repeats the process. Sender - This is a device that changes resistance according to a physical condition. The sender then sends a signal to a gauge. A single connection provides the signal and the power.Sensor - This is a device that monitors the physical condition of a machine system. The sensors can monitor the conditions that are listed here: pressure, temperature, flow and mechanical movement. The sensors convert the condition into an electrical signal that can be understood by an electronic control. Also see Transducer and Sender.Serial Data Link - This is a type of data link that transfers one bit of data at a time. The data link is most often used to transfer information between computer devices. Service Code - This is a type of maintenance code that describes a condition that has been identified by an electronic control system. The code indicates when service is required. This code is stored in the control for the service technician. This term was previously referred to as a fault code. This code is now referred to as a service type of maintenance event. See Event and Diagnostic Code.Service Event - This is a type of maintenance event that requires a service technician to perform service. This is usually routine service that is performed on the machine. Examples of service are changing the engine oil or transmission filters. See Event.Service Meter Hours (SMH) - This meter increments time only when the engine is running. This meter is most often used in order to determine the intervals for servicing the machine. This meter is also used to identify the time of occurrence of an event. This is used as part of the diagnostic process. Also see Service Meter Units. Service Program Code (SPC) - These codes are entered into the electrical system by the user through the keypad. The codes initiate the requested operation.Service Tool - This is a tool that is used in order to service Caterpillar machines. This term most often refers to the service equipment that is