B&B Electronics 4 Channel Input Buffer Board SDAIBB - Manual (Page 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 350
Ω
, 100mV load cell with a
common mode voltage of 2.5V using a gain of 22.28.
From Equation 15: ppm
mV
V
V
V
OS
2449
100
28 . 22
500
200
=
+
=
µ
µ
From Equation 16: ppm
mV
nA
I
OS
7
100
2 50 3
=
× Ω
=
From Equation 17: ppm 3500 Error Gain
=
From Equation 18: ppm
mV
V ppm
100
100
5 . 2 4
Error CMR
=
×
=
From Equation 19: ppm 50 ty Nonlineari Gain
=
From Equation 20: ppm
mV
nV
3
100
3000
noise 10Hz - 0.1Hz
= =
Total Unadjusted Error = 6109ppm
Error After Calibration = 53ppm