SITRANS FUP1010 Configuration: Clamp-On Flowmeter Field Setup

Overview

The SITRANS FUP1010 is a portable, battery-powered, clamp-on transit-time ultrasonic flowmeter used to measure liquid flow in full pipes without breaking into the line. Two piezoelectric transducers are clamped to the outside wall of an existing pipe, transmit and receive ultrasonic bursts diagonally through the pipe wall and the process liquid, and the meter computes volumetric flow from the difference in transit time between upstream- and downstream-propagating acoustic pulses. Because the FUP1010 is non-invasive, it is the workhorse for temporary surveys, spot-checking an existing inline meter, balancing flows across a plant, and verifying pump curves.

This reference walks through the complete field commissioning workflow: kit inspection, pipe and site preparation, transducer selection, couplant application, mechanical mounting, the on-device menu configuration sequence, zero-flow verification, data logging, and the most common fault conditions encountered during portable surveys.

Theory of Operation: Transit-Time Clamp-On

Two transducers are mounted on the same or opposite sides of a pipe. Transducer A fires an acoustic burst through the pipe wall, across the flowing liquid, and into transducer B. The transit time downstream (with the flow) is shorter than the transit time upstream (against the flow). The meter measures both transit times, calculates the delta-t, and converts the result to a velocity and then a volumetric flow using the entered pipe area.

The transit-time technique is fundamentally different from the Doppler technique. Doppler meters rely on suspended particles or bubbles to scatter the beam and are tolerant of dirty liquids but unusable on clean water. Transit-time meters rely on a clean acoustic path and are well suited to potable water, raw water, cooling water, and most clean industrial liquids. The FUP1010 is a transit-time instrument.

Two acoustic paths can be configured: a single-path install (one transducer pair, one chord) and a dual-path install (two pairs averaged to suppress swirl and asymmetric profile errors). For portable surveys the single-path configuration is the default and is adequate for the typical ±1% to ±3% accuracy target.

System Components and Kit Contents

Prerequisites

Confirm the following are on site before powering up the meter:

• FUP1010 transmitter with a charged internal battery (or fresh cells, depending on the variant).
• Transducer pair sized for the pipe OD and material. Each transducer carries an index number on its housing or cable label; this index must be entered into the meter.
• Mounting hardware compatible with the pipe diameter (chain set for 50 mm–600 mm, magnetic frame for steel pipes 100 mm–1500 mm, custom rail for very large or very small pipes).
• Spacer blocks for the selected mounting mode.
• Couplant gel rated for the pipe surface temperature. Water-based gel is suitable to roughly 80 °C; high-temperature gel is required above that.
• Confirmed pipe material (carbon steel, stainless steel, ductile iron, cast iron, copper, PVC, HDPE, GRP, etc.) and lining material and thickness, if any.
• Confirmed fluid identity (water, seawater, glycol mixture, light oil) and approximate operating temperature.
• Calipers, wall-thickness gauge, and a marker for laying out the transducer footprint.

Site Survey and Pipe Preparation

Accuracy on a clamp-on install is dominated by the quality of the mechanical and acoustic coupling, not by the transmitter electronics. Spend the time on the pipe first.

1. Select a measurement section at least 10 pipe diameters upstream and 5 pipe diameters downstream of the nearest flow disturbance (pump, elbow, valve, reducer, tee, strainer). Increase to 20D/10D for severely disturbed profiles.
2. Avoid sections with external corrosion, flaking paint, weld beads, or heavy surface roughness on the axial run where the transducers will sit. Wire-brush or sand the contact area to bright metal and wipe clean.
3. Confirm the pipe is full. The FUP1010 cannot measure accurately in a partially filled line. Verify by inspecting a drain, a sight glass, or a downstream open discharge.
4. Measure the pipe OD in two perpendicular axes with calipers; take the mean. For very large pipes, wrap a circumferential tape around the pipe and divide by π.
5. Measure or look up the wall thickness. For lined pipes, measure the host pipe wall only; the lining is entered as a separate parameter. Common carbon steel schedule 40 wall thicknesses: 2" = 3.91 mm, 3" = 5.49 mm, 4" = 6.02 mm, 6" = 7.11 mm, 8" = 8.18 mm, 10" = 9.27 mm, 12" = 10.31 mm. For other materials, consult the pipe schedule table.
6. Note the lining. Cement-mortar-lined ductile iron adds 6 mm–12 mm of acoustic travel and must be declared in the menu.
7. Identify the fluid, its temperature, and approximate operating pressure. The FUP1010 uses fluid sound speed internally; an unexpected gas phase or two-phase flow will degrade the signal.

Pipe Material Sound-Speed Reference

Sound speed through the pipe wall and the process liquid drives the transit-time calculation. The FUP1010 loads sound-speed constants for indexed pipe and fluid materials; the table below lists the values used internally so the engineer can sanity-check the meter on an unfamiliar service.

A 5% error in assumed wall sound speed or a 1% error in assumed fluid sound speed will move the calculated flow by roughly the same percentage. Always declare the actual pipe and fluid in the menu rather than leaving defaults.

Transducer Selection

Transducer frequency and face size are traded off against pipe size and signal attenuation. Lower frequencies penetrate thick or attenuative walls (ductile iron, cast iron, concrete, lined pipes) at the cost of resolution on small pipes. Higher frequencies give better resolution on small clean pipes but cannot drive thick walls.

Couplant Application

Acoustic couplant is mandatory. Air between the transducer face and the pipe wall attenuates the ultrasonic beam by more than 30 dB and will produce a no-signal condition even on a perfect pipe.

1. Apply a continuous 3 mm–5 mm bead of couplant along the centerline of each transducer footprint location on the pipe.
2. The bead must cover the full transducer face but should not squeeze out beyond the edges when the transducer is clamped.
3. Re-apply couplant if the transducers are repositioned. Dried couplant will not transmit sound.
4. For hot or cold pipes, use a couplant rated for the surface temperature. Standard water-based gel is good to approximately 80 °C; silicone-based or high-temperature gels are required above that range.
5. Wipe off couplant at the end of the survey. Water-based gel is mildly corrosive on certain stainless grades if left to dry.

Transducer Mounting Modes

Three geometric arrangements are available. The FUP1010 menu lets the installer select the mode; the meter then calculates the required transducer separation (the spacer length).

For the portable test kit, the spacer block snapped into the rail defines the axial separation for the chosen mode. The FUP1010 will display the recommended spacing in mm or inches on screen once the pipe data and transducer have been entered.

Mechanical Mounting Procedure

1. Lay out the transducer footprint on the pipe using the calculated spacing value from the meter. Mark the upstream and downstream positions with a pencil or tape.
2. Apply couplant to each footprint location (see couplant section above).
3. For rail mounting, snap the correct spacer block into the rail. For chain or strap mounting, fix the transducers in the mounting frame at the calculated spacing.
4. Place the assembly on the pipe and tighten the chain, strap, or magnetic frame until the transducers do not move when the pipe is tapped. The mounting force should be firm but not pipe-deforming.
5. Confirm that both transducers sit flat on the pipe with no air gap visible at the couplant interface. A small ring of couplant squeezing out at the edges is the desired visual indicator.
6. Route the transducer cables back to the FUP1010 transmitter, keeping them away from VFD power cables, motor leads, and other sources of common-mode noise.
7. Plug the upstream transducer into channel 1 upstream (or as marked on the meter face) and the downstream transducer into channel 1 downstream. Reversing them produces a negative reading that is easy to miss.

Device Configuration: Step-by-Step Menu Procedure

The sequence below configures a single channel on the FUP1010. The dual-channel variant allows two independent measurement points on the same meter, selected under Dual channel flow.

1. Power on the meter. Allow the self-test to complete and the last site configuration to load.
2. Press Menu.
3. Navigate to Dual channel flow. If you are using only one channel, leave channel 2 disabled to avoid wasted acquisition time.
4. Select Setup channel, then choose the channel to configure (Channel 1 or Channel 2).
5. Choose Full size setup. Full size setup walks through pipe data, transducer selection, and mounting mode in one guided sequence. Use Quick setup only on repeat visits to a previously saved site, where the pipe data and transducer selection are already known to be correct.
6. Select Channel setup.
7. Press the right arrow -> to enter the parameter entry view.
8. Create a site name / size name (for example, "Test1" or a tag number such as "FT-103"). This name is stored with the data log and is required to identify the record during download.
9. Press the left arrow <- to back out to the channel setup menu.
10. Enter Pipe data.
11. Enter the Pipe OD in the configured unit (mm or inches). Use the mean of the two caliper readings.
12. Enter the Wall thickness in the configured unit. For lined pipes, enter the wall thickness of the host pipe (not including the lining); the lining is entered as a separate parameter below.
13. Select the Pipe material from the indexed list.
14. If the pipe is lined, select the Lining material from the indexed list and enter the Lining thickness.
15. Press the left arrow <- to return to the channel setup menu.
16. Enter Fluid data. Select the fluid type and enter the operating temperature.
17. Select Pick / install transducer.
18. Choose the transducer size from the indexed list. The index number is printed on the transducer cable or housing label. Selecting the correct index loads the frequency, face area, and zero offset.
19. Choose the mounting mode (V, Z, or W).
20. Choose the spacing method. Use Track for portable surveys on pipes where the FUP1010 can compute the spacing from the entered pipe data. Use direct numeric entry if a rail micrometer is being used.
21. Note the displayed spacing. Set the spacer block and physically mount the transducers on the pipe at this distance.
22. When mechanical mounting is complete, select Install completed on the meter, then choose Install to start acquisition.
23. Wait for the meter to acquire signal. A successful install shows a stable flow value, a healthy signal strength (typically 50%–100% on the on-screen indicator), and a signal-to-noise ratio above the menu threshold.

Menu Tree Reference

Verification and Commissioning

Once the meter shows a stable reading, perform the following checks before logging data.

1. Confirm signal strength is in the green band on the on-screen indicator. A red or amber reading means the meter is reading through noise and the displayed flow should not be trusted.
2. Confirm signal-to-noise ratio is above the menu threshold (typically ≥ 30 dB for clean water lines).
3. With flow stopped, verify the meter reads 0.0 ± the zero stability spec. If the reading drifts, the transducer pair is micro-phonic (vibration coupling); re-clamp with a stiffer mounting or move the install away from the pump.
4. Compare the live reading to a known reference if available: an existing inline meter, a pump curve at a fixed speed, or a volumetric test.
5. Trigger the data logger to record the measurement. The FUP1010 stores time-stamped records that can be downloaded to a PC via the communication port.
6. Document the site configuration, pipe data, and verification readings in the field notebook. This record is the basis for any later re-survey of the same line.

Data Logging and Communication

The FUP1010 stores logged records in internal memory together with the site name, pipe data, and transducer index used at the time of logging. This is critical: a flow value without the configuration that produced it cannot be re-verified.

• Set the log interval to match the survey purpose. Spot checks use single-shot logging; pump tests use 1 s–5 s intervals; long-term trend surveys use 1 min–15 min intervals.
• For long surveys, confirm battery capacity supports the full planned duration. The meter's on-screen battery indicator gives a rough estimate; carry a spare charged pack for multi-day deployments.
• Data export is via the meter's wired communication port. Connect to a PC with the cable specified in the manual, launch the vendor's download utility, select the log file, and export to CSV or the vendor's native format for trending in Excel or a SCADA historian.
• Erase the internal log after a successful download to free space for the next survey.

Battery and Power Management

The FUP1010 runs from an internal rechargeable battery for true portability. Power-management practices that extend field runtime:

• Disable the backlight during outdoor surveys in daylight; the backlight is the largest single drain.
• Disable the second channel if only one measurement point is needed.
• Reduce the display refresh rate if the menu allows it.
• Power down during long transits between measurement points.
• Recharge the battery from a mains adapter or a 12 V vehicle supply using the manufacturer's charger only. Third-party chargers can damage the battery management board.
• Store the meter at room temperature with a 40%–60% state of charge; long-term storage at full charge or at zero charge degrades the cell.

Troubleshooting Matrix

Field Best Practices

• Always bring a wall-thickness gauge to site. Guessing the wall thickness is the most common cause of systematic error.
• Label the upstream and downstream transducers with tape before mounting. Reversing them produces a negative reading that is easy to miss if the sign is wrong in the menu.
• Keep the transducer cables away from VFD power cables. VFD common-mode noise can corrupt the receiver front end.
• For repeat surveys, save the site as a named configuration in the FUP1010 internal memory and recall it on the next visit rather than re-entering pipe data from scratch.
• For cement-lined ductile iron, the lining adds 6 mm–12 mm of travel time. Entering "no lining" will produce a 5%–15% low reading.
• For survey work on a pipe of unknown service, take a photograph of the pipe marking (manufacturer, nominal size, schedule) before mounting. Pipe markings are often the only reliable way to confirm the schedule.
• Always record the signal strength and signal-to-noise ratio with the logged data. A reading with poor signal quality is suspect regardless of how plausible the value looks.

Maintenance and Care

• Wipe transducer faces with a soft, lint-free cloth after every survey. Residual couplant left to dry on the face will pit the piezoelectric element over time.
• Inspect transducer cables for cracking, kinking, or shielding damage at every survey. A damaged shield lets noise into the receiver and degrades the signal-to-noise ratio.
• Recalibrate the FUP1010 against a reference flow rig on the interval specified in the manual; portable meters are typically verified annually.
• Store the unit in its transit case with foam inserts in place. Dropping a transducer can crack the piezo element without any visible external damage.
• Update the meter firmware to the version recommended by Siemens when performing a major survey. Firmware updates occasionally improve the transit-time algorithm for difficult pipe materials.

Specifications Summary

The following are typical for the SITRANS FUP1010 portable transmitter family. Always confirm exact values against the device nameplate and the official manual shipped with the unit, and against the Siemens flow measurement product page.

FAQ