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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 Material17-4PH H1150 + 1150 Stainless Steel
Bridge Resistance350Ω - 1000Ω
AccuracyBetter 0.5% FRO
Load ratings1t up to 1500t and above
Operating Temperature-40 to +80 ºC
Internal AmplifierDLM designed ‘Sirius’ 4-20mA 3 wire amplifier enabled with Force Magnitude Technology. See 'Sirius' Datasheet for further information.
Input Voltage12-30VDC for internal amplifier
RangesSubsea 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
CertificationCalibration, 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 Type4-20mA 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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