![]() Combination of multiple resistors in a single housing and direct plug-in unit for most DMM's Fluke, Wavetek, Agilent, is availableįor most resistance values, the SRL series are highest performance resisatance standards available from IET Labs.Calibration report at 3 temperatures- Temperature chart with alpha and beta provided.Excellent TC - as low as 0.4 ppm/☌ - No need for stabilization in a temperature-controlled bath.Used by National Measurment Institutes across the world.Please contact the IET sales department, for more information Wide range of values - 1 mΩ to 10 TΩ, In addition to the standard values, any custom value is available.Note: Type this formula into the spreadsheet cell as a continuous entry without carriage returns. The preliminary calculations can be hidden by collapsing the column. Be sure when copying the formula to other cells that both preliminary and final calculations are replicated. The formula will calculate the nearest 5% resistor for the value in cell A1. Type or paste the preliminary calculation formula below into cell B1, then type or paste the final calculation formula into any cell other than A1. A preliminary calculation is needed to determine the decade multiplier. The simple Excel formula below determines the nearest 5% standard resistor value by comparison without using a lookup table or a macro. Therefore, the solution to this problem is not elegant like the Excel solution for the 1% resistor described in “Excel Formula Calculates Standard 1% Resistor Values”. In fact, a full one-third of the 5% “preferred” values deviate from the formula. This formula is true for 1% and 2% standard resistors, but the 5% resistors do not track exactly. For the 1% resistor, the value of N = 96, for 2% N = 48, and for 5% N = 24. Where d = decade multiplier (0.1, 1, 10, etc.) and N = number of values per decade. The results are then rounded to the proper number of significant figures (3 for 1% and 2%, 2 for 5%): The general formula to calculate standard resistor values is given below. When 5% resistors will suffice, the Excel solution below will provide values that can directly be used for a material list. This approach will also result in real-life solutions to your circuit designs. When using a spreadsheet to calculate circuit values, determining “standard” component values to be used in subsequent calculations can produce more accurate results. ![]()
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