A master detector acts as the master detector in a slave circuit. Its election result is returned in the form of MasterInfo, or NONE if all masters have been lost. If it is not able to find a leading master, it returns a failed future. In such a case, the previous result should be passed back to the detector repeatedly. The detector only returns a different result when it detects a different master.
Returns MasterInfo after an election has occurred
The SENTINEL API provides two functions to manage the master and slave. The first one is SENTINEL FAILOVER, which forces the failover of a master when it cannot be reached. The second one, SENTINEL GET-MASTER-ADDR-BY-NAME, returns the address and port number of a master. SENTINEL INFO-CACHE is a utility that returns the INFO output of the masters and replicas.
Acts as the master detector in a slave circuit
A master detector acts as the master detector in a circuit that has a slave detector. The master section of a circuit receives the input signal and applies a charge to the capacitor 5. It then turns on the transistor 7 when the input signal is sufficiently negative. When this happens, the master detector outputs a voltage substantially equal to the voltage Vc of the supply connected to resistor 9.
The Master detector aggregates the signal from all slave detectors. Its output corresponds to the entire measurement range of the vessel and is connected to the control system. In a master-slave circuit, the master detector is either located at the top or at the bottom of the vessel. A typical example shows a master detector on the top and a slave detector on the bottom. The master detector has a 4-20 mA output that is connected to a DCS system. The DCS system maps the output current to the total level measurement.
JK flip-flop works
A master-slave JK flip-flop works in the same way. When the clock input is high, the Q output of the master is high, and when the clock input is low, the slave’s output is low. This is called the race around condition. Shortening the clock input will avoid this issue.
Another type of master-slave circuit is called a peak detector. It follows the peak voltage of a pulsed input signal. It consists of a master section and a slave section. The master section controls the droop rate of the slave section by controlling a resistor. In some cases, the resistor is disconnected to hold the peak of the input signal.
The master detector in a slave circuit sends a synchronising pulse signal to a slave detector that is in close proximity. The other detectors in the circuit receive the synchronising pulse signal from the master device and send a signal to the slave. This allows for greater detection depth.
Fermilab M-Test beamline
This experiment was performed at the Fermilab M-Test beamline. The data was recorded onto a computer on the fourth floor of the lab. The data collected for 48 hours is shown in the graph below. Note that the master detector’s count rate is 50% higher than the slave detector’s trigger rate is 90% lower.
Simulated results are used to verify network assembly and transport delays. The results show comparisons between outputs of three slaves and the master output. The comparison is done in both the case of a single master and between two slaves. These results are also useful for analyzing the overall performance of a multilayer network.
The D298M works as the detector in a slave circuit. It can work with up to 19 D287 or D288 Two-Wire Detector Bases or D603 or D604 Heat Detector Heads. The slave detection circuit must have an end-offline resistor of three kO or greater.