Maxim Integrated
│
10
www.maximintegrated.com
USB2PMB2# Adapter Board
Evaluates: Munich (USB2PMB2#)
a) Scope Options: On top right corner of the scope or
the Histogram plot, plot settings options are avail-
able for the user to play/pause, zoom in/out, pan,
print, save, and waveform settings.
b) Plot Configuration Options
i) ADC Counts: This option plots the ADC code
itself on the Y-axis with the number of samples
on the X-axis.
ii) Voltage: This option plots the converted volt-
age value.
iii) Current: Plots the current measured across
the 250Ω shunt resistor present in Campbell.
iv) 4-20mA to Temp: Plots the temperature mea-
sured from IFM TA3231 temp sensor. This
sensor sinks/ sources current proportional to
the temperature measured. The shunt current
and the temperature measured would also be
indicated the bottom of the GUI.
v) FFT: This option plots the FFT measurement on
the Y-axis vs. frequency on the X-axis.
vi) Histogram: This pushbutton option allows
user to view the resultant output in Histogram.
The X-axis is ADC code and the Y-axis is the
number occurrence.
vii) History Length: This option allows the user to
view the history data by choosing the history
length for viewing the data.
c) Average: Drop-down box menu to choose to aver-
age of the discrete values sampled. For instance,
if 16 is selected, it takes the first 16 samples of the
sample-shot the user takes, then averages them
and shows the number in the text box below. If
history is selected as well, it adds this number as a
datapoint to the history. If all is selected, it uses all
the samples taken, as selected in No of Samples
to build the average.
d) Calibrate: If the user wishes to calibrate, this option
enables a real-time calibration for each channel
and each signal input range; hence, providing a
robust calibration/measurements at each single
physical channel and each input signal range. See
Figure 13.
i) Shunt Resistor value: This option allows
entering the exact value of shunt resistance in
Cupertino board. This also allows the user to
change the resistance and scale the current
measured
ii) Offset: The offset calibration is done by forc-
ing the minimum voltage at input (based on
the selection of input range) 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 specified voltage
at the input to obtain the code. Here there are
seven different input ranges. Use appropriate
range selection for calibration.
FullScale Input Range
16
Volt per LS
V
B=
−
