1. Product Overview
The Seametrics FT520 is a versatile batching flow processor designed for precise measurement and control of fluid flow. It is compatible with Seametrics flow meters and sensors, as well as other frequency-output devices. The unit features a backlit display for clear indication of flow rate and other data, with user-selectable units of measure. Power options include 110 Vac, 220 Vac (optional), or DC power.

Figure 1: Front view of the Seametrics FT520 AC/DC Flow Processor. The display shows "FLOW RATE" and "GAL MINUTE" with directional arrows. Below the display are four control buttons. To the right, two red indicator lights for "Relay 1" and "Relay 2" are visible, along with a "Pulse Output" indicator.
2. Key Features
- Batch Control: Enables precise control over batching processes.
- Regeneration Control: Supports regeneration cycles for various applications.
- High/Low Flow Rate Monitoring: Monitors flow rates to detect deviations from set parameters.
- Water Usage Monitoring: Provides accurate data for tracking water consumption.
- Backlit Display: Large, easy-to-read 3/8” (9.66 mm) digits for clear data visibility.
- User-Selectable Units: Customizable units of measure from milliliters per second to millions of gallons per day.
- Flexible Power Options: Operates on 110 Vac, 220 Vac (optional), or DC power.
3. Setup and Installation
Proper installation is crucial for the accurate and reliable operation of the FT520. Refer to the detailed wiring diagrams and mounting instructions provided in the complete manufacturer's manual.
- Mounting: Securely mount the FT520 in a suitable location, ensuring environmental conditions are within specified limits.
- Power Connection:
- For 110 Vac operation, connect the provided 3-wire cord to a grounded outlet.
- For 220 Vac or DC power, connect to the internal terminal strip as per the wiring diagram. Ensure correct polarity for DC connections.
- Sensor Input: Connect your Seametrics flow meter or other frequency-output sensor to the designated input terminals. Verify connections for signal integrity.
- Output Connections: If utilizing batch control or other output functions, connect relays or other control devices to the appropriate output terminals.
- Initial Power-Up: After all connections are secure, apply power to the unit. The display should illuminate.
Warning: Ensure all power is disconnected before making any electrical connections to prevent electric shock or damage to the unit.
4. Operating Instructions
The FT520 features an intuitive interface for configuration and operation. Use the front panel buttons to navigate menus and adjust settings.
4.1. Basic Navigation
- Arrow Buttons (<, >, ▲, ▼): Used to navigate through menu options and adjust values.
- Set Button: Confirms selections and enters sub-menus.
- Start/Stop Button: Initiates or halts batching processes.
- Resume Button: Continues a paused batch or operation.
4.2. Configuration Steps
- Unit Selection: Access the settings menu to select desired units of measure (e.g., gallons per minute, liters per second).
- K-Factor Input: Enter the K-factor specific to your connected flow meter for accurate flow calculations.
- Batch Setpoint: For batching operations, set the target volume or duration.
- Relay Configuration: Configure the output relays for specific functions such as batch completion, high/low flow alarms, or regeneration cycles.
4.3. Starting a Batch
- Ensure all parameters are correctly set.
- Press the Start/Stop button to begin the batching process.
- The display will show the current flow rate and totalized volume.
- The batch will automatically stop when the setpoint is reached, or can be manually stopped by pressing Start/Stop again.
For advanced operating modes and detailed programming, consult the full Seametrics FT520 programming guide.
5. Maintenance
The Seametrics FT520 is designed for minimal maintenance. Regular checks ensure continued accuracy and longevity.
- Cleaning: Periodically clean the exterior of the unit with a soft, damp cloth. Avoid abrasive cleaners or solvents.
- Connections: Annually inspect all electrical connections for tightness and signs of corrosion.
- Sensor Calibration: Ensure your connected flow sensor is calibrated according to its manufacturer's recommendations to maintain measurement accuracy.
- Environmental Conditions: Verify that the operating environment remains within the specified temperature and humidity ranges.
Caution: Do not attempt to open the unit's enclosure unless specifically instructed by Seametrics technical support. There are no user-serviceable parts inside.
6. Troubleshooting
This section provides solutions to common issues. For problems not listed here, contact Seametrics technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No display or power | No power supply; incorrect wiring; blown fuse. | Check power connections and source. Verify wiring. Consult full manual for fuse location and replacement. |
| Inaccurate flow readings | Incorrect K-factor; sensor malfunction; air in line. | Verify K-factor setting. Check sensor for damage or blockage. Ensure proper flow conditions. |
| Batch does not start/stop | Incorrect batch setpoint; relay wiring issue; Start/Stop button malfunction. | Review batch setpoint. Inspect relay connections. Test Start/Stop button functionality. |
| Relay indicators not active | Relay not configured; wiring issue; load problem. | Check relay configuration in settings. Verify wiring to external device. Ensure external device is functioning. |
7. Specifications
| Parameter | Value |
|---|---|
| Model Number | FT520 |
| Manufacturer | Seametrics |
| Power Options | 110 Vac (standard), 220 Vac (optional), DC powered |
| Display | Backlit, 3/8” (9.66 mm) digits |
| Input Compatibility | Seametrics flow meters/sensors, other frequency-output devices |
| Output Controls | Batch functions, relays (e.g., for regeneration, high/low flow) |
| Package Dimensions | 10 x 10 x 10 inches |
| Weight | 10 Pounds |
| ASIN | B00Z9EMQ36 |
8. Warranty and Support
Warranty information for the Seametrics FT520 is typically included with the product packaging or available on the official Seametrics website. Please retain your proof of purchase for warranty claims.
For technical assistance, troubleshooting beyond this manual, or to inquire about replacement parts, please contact Seametrics customer support directly. Refer to the official Seametrics website for the most current contact information and detailed product documentation.
Online Resources: For the latest manuals, software updates, and FAQs, visit the official Seametrics website: www.seametrics.com




