Graco 332564B Mix Pressure Tolerance, Stall Test Pressure, Pump Stall Test, Maximum Leak Rate

Setup Mode Screens

System Screen 2

System screen 2 sets the following system operating parameters.

Figure 29 System Screen 2, in Standby Mode

Mix Pressure Tolerance

The pressure of one component must be within a percentage (±) of the pressure of the other component during spray or mix. Set the desired Mix Pressure Tolerance in this field. The default is 75%.

Stall Test Pressure

Set the minimum stall test pressure. The setting should be approximately 50 psi (0.35 MPa, 3.5 bar) higher than the highest inlet pressure.

Pump Stall Test

Set the duration for the pump stall test. See Calibrate Screen 1, page 77.

Maximum Leak Rate

Enter the maximum allowable leak rate for a pump stall test.

Mix Idle Timeout

The Gun Trigger Input signals that the device is triggered. If you are not using a gun trigger signal,

the system does not know if the spray device is spraying. If a pump failed you could spray pure resin or catalyst without knowing. This should be caught by the Mix No Flow Timeout; the default is 5 seconds. The Mix Idle Timeout will trigger Idle mode, which will run a pump stall test to check for leaks, then put the pumps in Standby (holding their current position) after the designated period of time. Enter the desired Mix Idle Timeout in this field.

See Digital Inputs, page 25.

Mix No Flow Timeout

The Gun Trigger Input signals that the gun is triggered. If the Gun Trigger Input indicates that the gun is triggered, but there is no fluid flow through a pump, you could spray pure resin or catalyst without knowing. The Mix No Flow Timeout will cause the system to shutdown after the designated period of time. The default is 5 seconds. Enter the desired shutdown time in this field.

See Digital Inputs, page 25.

Low Flow Tolerance

This field is active in systems set to Flow Control. The system will detect if the flow rate falls below a designated percentage of the target flow rate. Set that percentage in this field. For example, you might want the system to time out if it detects a flow rate that is 10 percent of the target, rather than waiting until a no flow timeout occurs.

Low Flow Timeout

The low flow timeout causes the system to shut down after the designated period of time if the flow rate continues to be at or below the low flow tolerance set in the previous section. The default is 5 seconds. Enter the desired shutdown time in this field.

68 332564B