The Flowserve SEM-100 and SEM-100FT are electronic flow meters designed for accurate measurement of various liquid viscosities with minimal pressure loss. These meters utilize positive displacement nutating disk technology, ensuring high precision in fluid measurement.
Function Description:
As fluid flows through the meter, it causes a nutating disk to move, which in turn rotates a hermetically sealed magnet disk. The electronic assembly counts these rotations and, based on a pre-set calibration number, mathematically determines the quantity of liquid that has passed through the meter. The SEM-100 is designed for fixed mounting to a pump or other device, while the SEM-100FT is intended for hose-end mounting, featuring a female threaded connection for the hose and a male threaded connection for a ball valve. Both models are identical in operation and performance.
Important Technical Specifications:
- Flow Rates: From 7.5 lpm to 110 lpm (2 gpm to 30 gpm).
- Temperatures: Up to 55°C (130°F).
- Pressures: Up to 4 bar (60 psi).
- Materials of Construction (Wetted Parts):
- Fluid Housing/Form Cover: Nylon or Polypropylene
- Meter Chamber: Polypropylene Sulfide (PPS), Stainless Steel
- O-rings: Viton® or EPDM
- Electronic Housing: Nylon
- Screws: Stainless Steel
- Compatibility: Polypropylene SEM-100 and SEM-100FT meters are designed for chemicals with a low pH. Users must ensure chemical compatibility between the metered liquid and the meter's wetted parts.
- Flammable Products: The meter should not be used to transfer flammable petroleum products with a flashpoint lower than 37°C (100°F).
Usage Features:
The SEM-100 and SEM-100FT meters feature a large Liquid Crystal Display (LCD) with an anti-glare screen and backlight, making them easy to read in various lighting conditions. Operation is simplified with large, positive touch buttons and a simple four-button interface.
- Display Modes:
- Current Total: Displays the current volume of fluid pumped. Wakes up automatically when fluid is pumped or by pressing the "ON" button.
- TOTAL-2: Displays the total units pumped since the last reset (cannot be reset to zero). Accessed by pressing and holding the "TOTAL-2" button while the Current Total is displayed.
- Flow Rate: Displays the flow rate in units of volume per minute ("FX.X"). Accessed by pressing and holding the "ON" button for 2 seconds.
- Resetting Current Total: Press and hold the "RESET" button for 3 seconds.
- Backlight: Activated by pressing "ON" then "RESET / CAL-3". Turns off automatically after 10 seconds of inactivity or by repeating the button sequence.
- Automatic Shut-off: The meter automatically turns off after 40 seconds of no input.
- Calibration Options: Three calibration modes are available:
- CAL-1: Requires pumping 5 units of fluid into a calibrated container.
- CAL-2: Requires pumping a known quantity of fluid (minimum 9.5 liters / 2.5 gallons for greatest accuracy, minimum 1.9 liters / 0.5 gallons) and then entering this quantity into the electronics using the "UP" and "DOWN" arrow keys.
- CAL-3: Allows manual adjustment of the calibration constant without pumping fluid. A typical CAL-3 number for water is 600. This function overrides previous calibrations.
- Installation: Flow can be metered in either direction.
- SEM-100: Threads into the female discharge port of a pump, with the discharge hose screwed onto the other port.
- SEM-100FT: Threads onto the end of a hose (female threads), with a 1-inch ball valve installed on the meter outlet (male threads).
- Important Installation Notes: Use thread sealant tape or pipe dope for connections. DO NOT overtighten threaded connections to prevent breakage and leakage. DO NOT mount the meter in a load-bearing manner to avoid breakage, fluid exposure, and leakage.
Maintenance Features:
- Battery Replacement: If the LCD display dims, the AAA batteries need replacement. The electronic assembly can be removed without exposing the meter's internal fluid.
- Procedure: Relieve system pressure. Remove 8 screws (PH-13) to detach the electronic assembly. Replace used batteries, observing polarity (positive end to red wire, negative end to black wire). Press "ON" to check power. Inspect and replace the gasket (S10-12) if damaged. Reinstall the electronic assembly, tightening screws to 32-36 inch-pounds in a star pattern to prevent leakage.
- Meter Chamber Removal (for cleaning or replacement):
- Safety: Flush the meter thoroughly with water before disassembling. Wear appropriate gloves, eye protection, and other necessary PPE when working with chemicals. Ensure the meter is not under pressure.
- Procedure: Remove the 8 screws (PH-13) securing the electronic assembly. Remove the 4 screws (PH-03) securing the meter plate (S10-02N) to the fluid housing (S10-05N). Remove the meter plate and O-ring (S10-03). The meter chamber can then be removed.
- Meter Assembly Procedure:
- Ensure the bottom O-ring (S10-04) is in place. Insert the meter chamber into the fluid housing (S10-05N). Place O-ring (S10-03) around the bottom of the meter plate (S10-02N) and position it on top of the fluid housing. Secure with 4 short screws (PH-03) torqued to 32-36 inch-pounds. Install the gasket (S10-12) and the electronic assembly (S10-11B COMPLETE) using the 8 long screws (PH-13) torqued to 32-36 inch-pounds.
- Troubleshooting:
- Meter reads high or low: Check for trapped air, pump sucking air (low fluid level or bad inlet connection), or calibration at different flow rates/fluids than operation.
- Meter flashes "ERR" after calibration: Indicates the meter electronics are not sensing magnet rotation (CAL-1 or CAL-2 text not blinking during pumping) or the dispensed volume was outside the valid range (0.5 to 20 units for CAL-2, or 9.5 to 265 liters / 2.5 to 70 gallons for overall calibration). Disassemble, clean, or replace the meter chamber if rotation is not sensed.
- No liquid passes or meter does not register flow: Check for foreign material obstructing flow or preventing the nutating disk from moving freely. Remove and clean the meter cartridge.
- Meter does not power on or display is dim: Replace the batteries.
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