Before disconnecting any cables to the EPC 400 it should be isolated by:
The EPC 400 only runs on 48 volts, it is not necessary to isolate.
Switching-off the EPC with the fuse switch, located in the top left hand corner of the box.
Switching-off the motor starter.
Switching-off the electrical supply to the EPC.
The EPC 400 controller is a sophisticated piece of microelectronics, which of the following statements best describes components and functions to be controlled?
Fail safe actions of valve actuation and motor stop facility.
Control of opening and closing water and the positioning of the interface for optimum separation.
Temperature control and correct positioning of the interface.
To monitor the transducer value and to take action if the level gets too high.
To keep a good check on the separator so the operator can sit in the control room and smoke.
The fuses on the front circuit board are numbered from the top as:
F1, F2 and F3.
F2, F3 and F1.
F3, F1 and F2.
F2, F1 and F3.
F3, F2 and F1.
What happens if you keep the alarm accept button pressed for more than 5 seconds?
It is possible to display extra process conditions.
32 previous alarms are displayed.
A “Lamp Test” of all LED’s.
A test of the alarm output to the central control room.
Which of the following statements are correct?
The emergency stop for the separator takes care of every emergency situation.
The emergency stop for the separator should be used in the event of heavy vibrations. It provides a similar function to the vibration switch.
In the event of having a burst pipe, the emergency stop should be used.
In the event of a burst or leaking pipe, the 3-way valve will always change to recirculation.
The “FIRE” stop (from some remote location), usually cuts the power to the motor. The power to the EPC 400 must be supplied from the motor starter, for the process to be stopped in this way.
回答
Which of the following statements are correct?
To change P37, C1 must be first set to 12.
Process parameters are in the group 50 to 89.
By changing P90 to 1, timer countdown is displayed.
P1 is not used for changing the time between discharges.
Which of the following statements are correct?
The EPC 400 has 2 printed circuit cards to monitor ALCAP functions.
The EPC 400 monitors the transducer and coordinates the ALCAP functions with the operating sequence.
There are 4 different generations of EPC 400.
The EPC 400 can be adjusted to suit different operating voltages.
Which of the following statements are correct?
Electrical inputs connect to the left side of the control module.
Electrical inputs connect to the right side of the control module.
The transducer connects to terminals on the rear circuit board.
Electrical outputs connect to the left and right side of the front circuit board.
What is the identification for the terminal on the top right hand side of the front circuit board?
