4 Channel Input Buffer Board Product Manual

B-2 SDAIBB3599Manual
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
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
mV
V
V
V
OS
2449
100
28.22
500
200
=
+
=
µ
µ
From Equation 16:
ppm
mV
nA
I
OS
7
100
2503
=
×Ω
=
From Equation 17: ppm3500ErrorGain =
From Equation 18:
ppm
mV
Vppm
100
100
5.24
Error CMR
=
×
=
From Equation 19:
ppm50tyNonlineariGain
=
From Equation 20: ppm
mV
nV
3
100
3000
noise 10Hz - 0.1Hz ==
Total Unadjusted Error = 6109ppm
Error After Calibration = 53ppm