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Aware your knowledge for Loadcells technical terms
Loadcells Technical Terms
Nominal Load / Rated load
Sensitivity
Excitation Voltage
Safe-overload
Ultimate overload
Non-linearity
Creep
Temperature-effect-@zero-load
Temperature-effect-on-sensitivity
Zero-balance/No-load-output
Zero-return
Non-repeatability
Hysteresis
Resistance-measurements
IP Protection
Nominal load/ Rated load
The nominal load means the upper limit of the measuring range of a loadcell or transducer. Load can be tensile or compressive force. Indicated in units of mass or force according to the calibration.
Sensitivity
This is the maximum signal output at the rated load of the Load cell expressed in millivolt per volt (mV/V). This is also termed as rated output or full scale output(FSO)
Excitation voltage
The excitation voltage is the input voltage, in which the load cell can be operated in practical applications and within which the technical data and error specifications are maintained.(Usually 10 VDC- maximum 15VDC)
Safe overload
The maximum load that can be applied without producing a permanent shift in the performance characteristics beyond specifications.Generally 150% of the rated load.
Ultimate load
The load at which the spring element takes permanent deformation.Generally 200% of rated load.
Non-linearity
The maximum deviation of the actual calibration curve from the ideal curve between zero and rated load outputs.
Measured on increasing load only.
Expressed as a percentage of the rated output.
Creep
Under constant load the change in load cell output that occurs with time.Its always increases with increasing load and temperature.
Temperature effect - @ zero load
The change in zero balance due to the change in ambient temperature.
Temperature effect - on sensitivity
The change in output at loaded condition due to the change in ambient temperature
Zero balance/ No load output
The signal output of the load cell with rated excitation and with no load applied.
Usually expressed as a percentage of full scale output or rated output.
Zero return
The difference in zero balance measured immediately before rated load application of specified duration and measured after removal of the load and when the output has stabilised.
Non-repeatability
The maximum difference between load cell output reading for repeated loading under identical loading condition/ pattern and environmental conditions
Expressed as a percentage of rated output
Hysteresis
The maximum difference between load cell output reading for the same applied load, one reading obtained by increasing load from zero and the other by decreasing the load from rated load Expressed as a percentage of rated output.
Resistance measurements
Input resistance
Output resistance
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Insulation resistance between body and conductor
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Insulation resistance between body and shield
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Insulation resistance between conductor and shield
IP (Ingress Protection) standards
Degrees of protection indicated as per IS 12063: denoted as IP - XY
Number
Degrees of Protection Against Dust (X)
Number
Degrees of Protection Against Water (Y)
0
Not Protected
0
Not Protected
1
Protected against solid object > 50mm
1
Protected against Dripping Water
2
Protected against solid object > 12mm
2
Protected against Dripping Water when tilted upto 15 Deg
