¶ Injector Flow Meter
The Injection Flow Settings pertain to the operation of the injector pump and its associated system (image 1.1). These settings typically control the amount of chemical or other substances being injected into the water system, ensuring accurate dosing and optimal system performance. Proper configuration of these parameters is essential for maintaining water quality and system efficiency.
¶ Injector Flow Data
At the top of the screen (Image 1.2), the PLC displays real-time data collected from the injector flow meter.. The "since" date indicates the last reset point; pressing the "Reset Flow Total" button will reset the gallons counter to zero and update the "since" date to the current date on the HMI.
Additionally, the Total Gallons Non-Resettable totalizer continuously records the overall volume of water used for filter cleaning since system installation or the last hardware reset. This total cannot be cleared or reset by the user.
¶ Low flow fault limit and delay
The low fault limit is a user-configured threshold that monitors whether the injection system is receiving adequate flow (image 1.3). If the flow measured by the injection flow meter drops below this limit, a delay timer starts. During this delay, the system continues to operate at or below the fault threshold to allow time for air pockets to clear or valves to fully open and close. If the low flow condition persists beyond the delay period, the system faults the injection pump and the entire station, indicating that the injection system is not functioning correctly.
¶ Flow Meter Scaling
Omnia supports monitoring station, fill, recirc, and well flow meters that output pulse or analog mA signals. For pulse meters, follow the manufacturer's instructions to determine the flow meter’s k‑factor (pulses per gallon). Enter this value into the Pulse Scale setting.
Next, zero the mA Scale—this activates the pulse measurement mode. If the mA scale is not zeroed, pulse readings will not function correctly. Once configured, the system converts incoming pulses into flow rates, displaying the flow in GPM on the main screen of the HMI (Image 1.4).
The Analog Full 20mA Scale should be set to match the maximum flow rating of the flow meter’s 20mA output. This value typically represents the highest flow the meter is rated to measure. For meters with adjustable 20mA span, verify that this scale matches the configured maximum output value on the flow meter to ensure accurate readings and proper system calibration.
