Graco 234129, Инструкция по эксплуатации

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PrecisionFlo LT User Interface
28 309738L
Operation Modes
The PrecisionFlo LT system has two operating modes:
• Automatic dispense mode – enables the Precision-
Flo LT module to begin dispensing when it receives a
command from the automation unit.
• Manual dispense mode – enables the Precision Flo
LT module to begin dispensing when you press Man-
ual Dispense Gun on the EasyKey interface. Dis-
pensing continues for as long as the Manual
Dispense Gun button is pressed. Manual mode is
also used for system tuning or calibration.
To select the Operation Mode and to operate in manual
dispense mode, see the following specific instructions.
Refer to Appendix C , Theory of Operation , page 95
for more information on Operation Modes.
Refer to Keypad Overview on page 27 for key
locations.
Setting Operation Mode
On the keypad, perform the following steps:
1. The dispense mode is indicated on the run screen,
either Auto or Manual.
2. To change the mode, press the Auto/Manual key.
Manually Dispensing Fluid
On the keypad, perform the following steps:
1. Place the system in manual dispense mode. Refer
to
Setting Operation Mode , above.
2. Press the Manual Dispense Gun key .
a. Press the key and verify that the dispense
device opens.
b. Continue to press the key as long as needed to
load material or dispense.
Control Modes
The PrecisionFlo LT module has four fluid dispensing
control modes:
• Bead Control – the control unit measures the flow
rate of material being dispensed. The regulator outlet
pressure is varied to control the fluid flow rate to the
requested value. Use Bead Control Mode when a
consistent bead size is required.
• Volume Monitor – regulator outlet pressure is con-
trolled to the requested value. Use Volume Monitor
Mode when a constant pressure is required for a
spray application.
• Batch Dispense – regulator outlet pressure is con-
trolled to the requested value. Dispense valve is
closed when target volume is reached or the automa-
tion provides a signal.
• Pressure Control – regulator outlet pressure is con-
trolled to the requested value. Use pressure control
mode if the system does not include a flow meter.
Refer to Appendix C , Theory of Operation , page 95
for more information on Control Modes.
Setting the Control Mode
1. Place the system in setup mode (key switch clock-
wise).
2. The control mode is indicated on the dispense
screen.
3. To change the mode, press the down arrow key
until the cursor is over the mode cell.
4. Press Enter and use the up and down arrow keys,
or to change values.
5. Press Enter.