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
2
1
SB
=
−
If there is no gain error:
16
Vol
4.096
0.0000625 Volt/digit
2
1
t per LSB
−
=
=
Figure 11. “Calibration” Display on Munich/Campbell GUI