S Series FW 3.02.02
www.stenner.com
48
CONTROL MODES MENU
continued
PPM FEED
page 1 of 6
Allows user to 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:
• In GPD
Pump Output Required (GPD)
=
Process GPM × Feed Rate PPM X 1440
Chemical Concentration % × 10,000 × Specific Gravity
Pump Speed (%)
=
Pump Output Required (GPD) × 100
Max Pump Flow (GPD)
• In LPD
Pump Output Required (LPD)
=
Process LPM × Feed Rate PPM X 1440
Chemical Concentration % × 10,000 × Specific Gravity
Pump Speed (%)
=
Pump Output Required (LPD) × 100
Max Pump Flow (LPD)
• When the pump receives an input signal, it runs at the speed calculated to dose the PPM level programmed.
