Stenner Pumps S Serie Manual De Instalación Y Mantenimiento página 46

CONTROL MODES MENU
PPM FEED
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Operator can configure the pump to automatically dose a specific ppm of solution into the process flow.
PPM feed has two options: Constant Flow, Flow Switch and Variable Flow, Hall Effect.
Constant Flow, Flow Switch: The Constant Flow, Flow Switch option is used with process systems with a constant flow.
The pump accepts a dry contact or an open collector signal to trigger the pump.
Program the pump with the:
• Process flow rate (GPM or LPM selected in the Units submenu of Configuration)
• Chemical concentration %
• Desired PPM dosing rate of the chemical
The pump uses the following equations to calculate the required speed:
• GPD
Pump Output Required (GPD) =
Pump Speed (%) =
• LPD
Pump Output Required (LPD) =
Pump Speed (%) =
• When the pump receives an input signal, it runs at the speed calculated to dose the PPM level programmed.
S Series FW 4.01.02 US and Canada 800.683.2378, International 904.641.1666 www.stenner.com
continued
Process GPM × Feed Rate PPM X 1440
Chemical Concentration % × 10,000 × Specific Gravity
Pump Output Required (GPD) × 100
Max Pump Flow (GPD)
Process LPM × Feed Rate PPM X 1440
Chemical Concentration % × 10,000 × Specific Gravity
Pump Output Required (LPD) × 100
Max Pump Flow (LPD)
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