Jesco MAGDOS DE/DX Operating Manual

Jesco MAGDOS DE/DX Operating Manual Manual pdf 29 page image

11.4 Correcting stroke length adjustmentIMPORTANT!It may be necessary to readjust the dosing pump after replacing the diaphragm or other spare parts①②① Stroke length adjustment knob, ② lock screw1. Dosing pump set to internal control.2. Regardless of the pointer position, release the lock screw and turn the stroke length adjustment knobcounterclockwise until the dosing pump stops delivering medium or delivery is reduced to a minimumduring depressurised operation.ATTENTION!Do not use force. Due to the flexibility of the stop buffer the diaphragm can still move by a certain extenteven in position "0".If zero delivery cannot be achieved because the knob is up against the limit stop, after undoing the lockscrew, remove the knob and reinstall turned in clockwise direction. Then adjust zero delivery.CAUTION!The delivery line must be routed back to the storage tank during setup in order to prevent overdosing.3. Detach knob and re-attach so that the indicator is pointing to "0".Holding the knob firmly in position, tighten the lock screw.4. Gauge the capacity of the dosing pump by litres according to a setting shown in the calibration table.If there is a major discrepancy, correct the position of the knob.Maintenance | Operation & Maintenance Instructions | 29