Maxim Integrated │ 8

www.maximintegrated.com

USB2PMB1# Adapter Board

Evaluates: Munich (USB2PMB1#)

e)

Calibrate: If the user wishes to calibrate, this option

enables a real-time calibration as shown in Figure 11.

i)

Shunt Resistor value: This option allows entering

the exact value of shunt resistance in Campbell

board. This also allows the user to change the

resistance and scale the current measured.

ii)

Offset: The offset calibration is done by forcing

a 0V input voltage or 0mA current to obtain the

plot counts. This plot counts value if other than

0, should be fed in the offset digit tab.

iii)

Volt per LSB: This option calibrates for gain

error. The volt per code calibration is done

by forcing approximately 80% of the specified

input range (4.096V) at the input to obtain the

code.

16

Vin_Mea

Volt per

sured

L

21

SB =

−

If there is no gain error:

16

Vol

4.096

0.0000625 Volt/digit

21

t per LSB

−

=

=

Figure 11. “Calibration” Display on Munich/Campbell GUI