10. The above adjustments are interactive. It may be necessary to repeat steps (2)
through (5) several times until the voltages stabilize. This completes coarse
adjustment.
Without Ratio Control – Fine Adjustment
11. With the override switch still in the “out” or manual position start the pump.
12. Set up a voltmeter for DC voltage measurement between TB2-3 (positive) and TB2-1
(common).
13. Set the control signal at the low end (0%). Move the override switch to the “in” or auto
position. The LO” drive LED will light and the pump with automatically adjust to the
0% stroke.
14. Adjust the “LO” trim potentiometer on the circuit board to the voltage recorded in step
(4). The stroke indicator should now read 000-001 and both LED drive lights should
be off.
15. Apply a high end (100%) control signal. Allow the pump to adjust to 100% stroke.
16. With the voltmeter remaining as set up in step (12) above, adjust the “HI” trim
potentiometer to the voltage recorded in step (5). The stroke indicator should now
read 099-100 and again both drive lights should be off.
17. The above adjustments are interactive. It may be necessary to repeat steps (12)
through (16) several times until the voltages stabilize. This completes fine adjustment.
With Ratio Control (Optional Feature) – Coarse Adjustment
1. With the override switch in the “out” or manual position, start the pump.
2. Set the controls signal at the low end (0%). Move the override switch “in” to the auto
position and allow the pump to adjust to 0%.
3. Place the override switch back in the “out” or manual position. Check the stroke
indicator; if it does not read 000-001 use the handwheel to manually adjust it to this
point.
4. Set the remote ratio control potentiometer at 100%.
5. Set up the voltmeter for DC voltage measurement between TB3-4 (positive) and TB3-
6 (common).
6. Adjust the “Ratio Zero” potentiometer on the circuit board (to the right of TB3) to +/-
0.0 volts.
7. With the voltmeter remaining as set up in step (5) above, set the control signal at the
high end (100%) and record the voltage.
8. Set up a voltmeter for CD voltage measurement between TB2-5 (positive) and TB2-1
(common).
9. Adjust the “LO” trim potentiometer on the circuit board to +/-0.0 volts.
10. Set up a voltmeter for DC voltage measurement between TB2-4 (positive) and TB2-1
(common).
11. Adjust the “HI” trim potentiometer on the circuit board to the high end voltage
recorded in setup (7) above.
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