Rockland Research

Pressure Controller

Installation and Operation Manual

 

IMPORTANT SAFETY NOTICE:

All safety regulations, local codes and instructions that appear in the manual or on the equipment must be observed to ensure personal safety and to prevent damage to either the controls or the equipment connected to it. If the equipment is used in a manner not specified by the manufacturer the protection of it and personnel may be impaired.

 

 

Installation (Electrical):

Main Electrical Cabinet

The Electrical Power Supply requirements are: 220v, 1phase, 60hz, 20amp

The supply should be from a dedicated circuit that can be switched OFF and locked when the Pressure Controller is not used or is being serviced. Connect the power supply to fuses 1-FU ,2-FU and Ground. Refer to the electrical schematic for exact wiring information.

Mount the Cabinet to a suitable vertical surface. The Cabinet location should provide easy operator access and visibility to the door mounted operator controls.

Electrical Junction Box

The junction box contains the wiring for the pressure controller servomotor, and pressure ram overtravel limit switches. A cable connects the junction box to the Main Electrical Cabinet. The cable wiring connects to a receptacle on the side of the Main Electrical Cabinet.

Pressure Transducer

A pressure Transducer is connected to the ram output pressure supply line. The transducer provides an electronic (4-20 ma) signal that is proportional to the actual hydraulic pressure. A cable from the Main Electrical Cabinet has an attached connector that plugs into the transducer. A calibration record is provided with the transducer and should be kept with the system.

 

The electrical wiring is now completed.

 

 

 

 

 

 

 

 

 

           

 

 

 

 

 

 

 

 

Operator Controls Description

 

 

[POWER, PULL ON-PUSH OFF]  PUSH BUTTON

Pulling this push button energizes the electrical controls. The red light is ÒonÓ when the controls are energized. Pressing this push button de-energizes the electrical controls. The push button will light when the controls are energized.

 

[PRESSURE/ DEC-INC] 3 position Selector switch

Selects the direction of pressure change in the manual operation mode.

Select the [INC] position to increase the system pressure. The system pressure will increase to the Omega Setpoint [1] value.

Select the [DEC] position to decrease the system pressure. The system pressure will decrease to zero TONS pressure. The controls will not permit the pressure to be a negative value.

Select the middle position to stop system pressure change.

 

Note: The effect of the experiment may cause the ÒactualÓ pressure to change in the system. The selector switch acts to set the system pressure to an initial value. The actual experiment may cause the system pressure to raise or lower from the initial setting. Should the experiment cause the ÒactualÓ pressure to exceed the Omega Setpoint [2] value, the pressure will be lowered automatically until Setpoint [2] is reached.

 

[RPM] digital meter

This meter indicates the pressure ram motor operating speed (0-2,000 RPM) and pressure direction (+) or (-). The operating speed of the motor determines the rate of pressure change in the system. The pressure (increase and decrease) rate is adjustable by the [PRESSURE ADJ] 10-turn potentiometer.

 

[PRESSURE ADJ] 10-turn potentiometer

Controls the speed of the pressure ram motor. The motor speed determines the rate of pressure change (increasing or decreasing) in the system. The motor speed can be adjusted from 0-2,000 RPM. Turn the control clockwise to increase the motor speed. Turn the control counterclockwise to decrease the motor speed. The system pressure rate is dependent upon the actual experiment. Set the control to an initial position to determine a system rate, then adjust the control to the rate desired.

 

 

 

 

 

 

 

 

 

 

 

[BYPASS/ DEC-INC] selector switch, 2 position keyed

This selector switch allows the operation of the pressure ram should the controls fault after reaching either end of the ram stroke. If the system pressure ram reaches either end of its stroke the controls will stop the ram, the [POWER ON] light will turn off and the red [OVER TRAVEL FAULT] pilot light turns on.The pressure ram can only be reversed from itÕs overtravel position by using the [BYPASS/DEC-INC] selector switch.

 

To correct a fault condition:

Turn the [PRESSURE/ DEC-INC] selector switch to the middle position

Turn the [BYPASS/ DEC-INC] switch to the [INC] position to advance the ram if it faulted in the retracted direction.

Turn the switch to the [DEC] position to retract the ram if it faulted in the advance direction.

The ram can only be moved in the direction to correct the fault. When the fault has been corrected the [OVERTRAVEL FAULT] pilot light will turn off and the pressure controls can be energized.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OMEGA PRESSURE METER

Note: Refer to the Omega Operators Manual for detailed instructions on the operation and use of the Omega controller.

Description

The Omega Pressure Controller displays the actual system pressure in TONS (0-1,000.0). A Pressure transducer that is connected to the press hydraulic system provides a 4-20 milliamp electronic signal to the controller. This pressure signal is also connected to the PLC.

There are two- (2) user adjustable Setpoints on the Omega pressure controller that are used to control the system pressure. They are called ÒSP1Ó and ÒSP2Ó (note: ÒSP3Ó and ÒSP4Ó are not used).

The setpoint is actuated when the ÒactualÓ pressure reading reaches the setpoint value. The setpoints have status indicators located on the pressure reading display. The indicator is light is ÒonÓ The display flashes when the actual value reaches the  setpoint value.

To view the ÒSetpointÓ values press the [SETPTS] button on the controller. The controller now displays the Setpoint value and indicates what setpoint is being shown. The Setpoint can be changed by pressing the [MIN] and the [MAX] buttons. Each time the [SETPTS] button is pressed the controller saves the displayed Setpoint and then steps to the next Setpoint. Press the [RESET] button to return to the controller to display the ÒactualÓ pressure reading. During normal operation the controller should be set to display the ÒactualÓ pressure.

 

Setpoint one (1)

Setpoint [SP1] is the Low-pressure limit. Pressure increase is stopped when the ÒactualÓ pressure is at (or above) the ÒSetpoint 1Ó value.

If ÒactualÓ pressure is above ÒSetpoint one (1)Ó a numeral "SP1" will be illuminated on the meter.

Setpoint two (2)

Setpoint [SP2] is the High pressure limit. If the ÒactualÓ pressure rises to (or above) Setpoint [2] a numeral "2" will be illuminated. The system pressure will automatically be decreased until the ÒactualÓ reading is less than the value of setpoint 2. The display flashes when setpoint two (2) limit is active.

 

Example:

Setpoint one (1) programmed limit (500.0 Tons)

Setpoint two (2) programmed limit (505.0 Tons)

Turn the [DEC-INC] selector switch to the [INC] position.

The controller will increase pressure to (500.0 Tons), then stop. If the actual pressure drops to (499.9 Tons), the controller will energize to increase the system pressure.

If the experiment causes the system pressure to reach (505.0 Tons) the controls will react by decreasing the system pressure to (504.9 Tons).

 

 

 

 

 

 

 

 

 

CUSTOMER SERVICE and SUPPORT

 

Rockland Reasearch

Phone: (914) 353-4686

Fax: (914) 358-9119

Internet: http://Rocklandresearch.com

E-mail: petermc@Rocklandresearch.com

 

 

 

Industrial Automation Specialists, Inc

321 North St.

Goshen, CT 06756

Phone: 860-491-9535

Fax: 860-491-9537

E-mail: