Graco 234129, Инструкция по эксплуатации

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Configuring Software
34 309738L
Setting Flow Meter K-Factors
The accuracy of the PrecisionFlo LT volume reporting
depends on precise adjustment of the K-factor(s). The
control unit uses the K-factor(s) to calculate the volume
dispensed. If the set value is not correct, the system still
delivers accurate and repeatable flow rates; however,
the reported value may not be correct. See page 36 for
additional K-factor information.
Table 4 - Flow Meter K-Factors
Set Flow Meter K-Factor
On the keypad, perform the following steps:
1. With the system in setup mode, press the screen nav-
igation key
until the OTHER screen appears.
2. Press the down data field navigation key until the
flow meter K factor value is highlighted.
3. Key in the K-factor value and press Enter. See Table
4 - Flow Meter K-Factors for values.
System Calibration
Pressure Calibration
The PrecisionFlo LT system uses variables (Kp and Ki)
in the software calculations to accurately and precisely
control the fluid pressure and flow rate. The control unit
calculates Kp and Ki automatically during pressure cali-
bration. These values are different with every material.
The system must be loaded with material before
calibrating pressure. The nozzle or tip should be
installed on the dispense device.
Before Calibrating
1. Verify that the system is in setup mode and manual
dispense mode.
2. Verify that dispense device is placed over a material
waste container.
3. Verify that the fluid module air supply is on.
4. Verify that the control mode is set to the desired
value.
Calibrate
On the keypad, perform the following steps:
1. Press the right screen navigation key until the
Calibrate screen appears.
2. Enter the desired 100% command Flow/Pressure.
3. Press the Manual Dispense Gun key . The sys-
tem will dispense material for 15-30 seconds and
gather the required information.
Manually Adjusting Kp and Ki
If automatic pressure calibration does not result in
proper system pressure control, you can change the Kp
and Ki values manually:
• If the regulator outlet pressure does not closely fol-
low the desired pressure increase Kp with the Ki
value set to zero. Continue to increase the Kp value
by 10% increments until the proper pressure control
is achieved.
• Decrease Kp if the regulator outlet pressure oscil-
lates rapidly above and below the commanded pres-
sure. Continue to decrease the Kp value by 10%
increments until the outlet pressure is stable.
• Set Ki volume to 2 and continue to increase the Ki
value by 2 until the system oscillates.
• Decrease Ki until oscillation stops.
Part No.
Description
K-Factor
239716 G3000 Gear Meters 8400
244292 G3000 HR Gear Meter 16400
246190 Helical Gear Meter 3500
246652 High Resolution Helical Gear
Meter 7000
246340 Heated Helical Gear Meter 3500