Force Magnitude Load Pin FM-LP
New Technology developed by and exclusive to DLM the Force Magnitude technology can be applied to almost any size shear pin load cell.
Making use of DLM’s intelligent ‘Sirius’ Amplifier mounted internally in the pin and a dual gauged Shear Pin Load Cell, the Force Magnitude technology enables the client to have a Shear Pin Load Cell which can read load in any direction within range.
Typical Shear Pin Load Cells are required to be fitted so that the load is applied in one plane on the Pin and will not produce accurate load readings if load is applied outside this plane. However with Force Magnitude technology load can be applied and accurately read in various locations around the pin, eliminating the need for a load direction and preventing constraints to clients mounting arrangements.
Key Features
- Ability to measure magnitude of load in varying directions around the load pin
- Wide application area of 110˚
- Option signal outputs of a single 4-20mA or RS485
- DLM proprietary design
Applications
- Subsea vehicles
- Stinger load monitoring
- Moorings
- Applications where the load direction changes
Dimensional Data
For a given load applied in any single direction within the load application region, the Force Magnitude Shear Pin Load Cell will output a consistent calibrated 4-20mA output where 4mA=0t and 20mA = SWL. This removes the need to have a load direction on the Shear Pin Load Cell.
Specification
| Pin Material | 17-4PH H1150 + 1150 Stainless Steel |
| Bridge Resistance | 350Ω - 1000Ω |
| Accuracy | Better 0.5% FRO |
| Load ratings | 1t up to 1500t and above |
| Operating Temperature | -40 to +80 ºC |
| Internal Amplifier | DLM designed ‘Sirius’ 4-20mA 3 wire amplifier enabled with Force Magnitude Technology. See 'Sirius' Datasheet for further information. |
| Input Voltage | 12-30VDC for internal amplifier |
| Ranges | Subsea Variant available with Face and Barrel O ring sealed end caps for Subsea rated protection. Land Variant available with O ring sealed end caps and gland cable connection. |
| Connection options (client specific) | 46.5MBORA connector Impulse MCBH-3-MP-SS IP67 Cable Gland and cable Customer specified connector |
| Certification | Calibration, proof load and test certificates to BS EN 10002/2 1992 traceable to a UKAS approved laboratory or the NPL. Material Certificates to 3.1. |
| Pressure tested (Subsea only) | Up to 300Bar (fully traceable certificate supplied). |
| Output Type | 4-20mA scaled to SWL over load application range. RS485 |
Typical Calibration Results
During calibration the pin is setup and tested over a range of angles within the load application region (see diagram) in order to ensure a consistent 4-20mA signal is being produced relating to the load applied.
| Applied Force (kN) | Applied Angle (°) | Projected Current (mA) | Actual Current (mA) |
| 0.00 | 70 | 4.00 | 4.00 |
| 80.00 | 70 | 7.20 | 7.21 |
| 160.00 | 70 | 10.40 | 10.44 |
| 240.00 | 70 | 13.60 | 13.63 |
| 320.00 | 70 | 16.80 | 16.81 |
| 400.00 | 70 | 20.00 | 19.92 |
| 0.00 | 80 | 4.00 | 4.00 |
| 80.00 | 80 | 7.20 | 7.21 |
| 160.00 | 80 | 10.40 | 10.41 |
| 240.00 | 80 | 13.60 | 13.60 |
| 320.00 | 80 | 16.80 | 16.83 |
| 400.00 | 80 | 20.00 | 20.07 |
| 0.00 | 100 | 4.00 | 4.00 |
| 80.00 | 100 | 7.20 | 7.19 |
| 160.00 | 100 | 10.40 | 10.30 |
| 240.00 | 100 | 13.60 | 13.55 |
| 320.00 | 100 | 16.80 | 16.70 |
| 400.00 | 100 | 20.00 | 19.80 |
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