Bb-electronics 4 Channel Input Buffer Board SDAIBB Manuale Utente Scaricare il pdf (Pagina 21)

B-2 SDAIBB3599Manual

B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104

Example:

Calculate the error budget for a 350Ω, 100mV load cell with a

common mode voltage of 2.5V using a gain of 22.28.

From Equation 15: ppm

2449

100

28.22

500

200

From Equation 16:

ppm

100

2503

×Ω

From Equation 17: ppm3500ErrorGain =

From Equation 18:

ppm

Vppm

100

5.24

Error CMR

From Equation 19:

ppm50tyNonlineariGain

From Equation 20: ppm

100

3000

noise 10Hz - 0.1Hz ==

Total Unadjusted Error = 6109ppm

Error After Calibration = 53ppm

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Bb-electronics 4 Channel Input Buffer Board SDAIBB Manuale Utente Pagina 21