for the purposes of type evaluation/pattern approval, a load cell family consists of load cells that are of: - the same material or combination of materials (for example, mild steel, stainless steel or aluminum); - the same design of the measurement technique (for example, strain gauges bonded to metal); - the same method of construction (for example, shape, sealing of strain gauges, mounting method, manufacturing method); - the same set of specifications (for example, output rating, input impedance, supply voltage, cable details); and - one or more load cell groups