ZMOD4410 Evaluation Kit User Manual
© 2019 Integrated Device Technology, Inc.
12
April 3, 2019
Table 2.
Analysis Tab User Options
Display Section
Button/Action
Description
“Data source”
The “clear memory” button will delete all current data from the plots (memory). The data in
the measurement file will remain.
The “load data file” button will open a file selection dialog. This function can be used to
display and analyze data from a measurement file acquired earlier. The data file must have
the same structure as the measurement file created by the ZMOD4410 Evaluation Software.
The “append incoming sensor data” checkbox activates the functionality to append the
current measurement data to the plots in the “Analysis” tab.
If measurements are acquired simultaneously for multiple ZMOD4410 gas sensors, the
measurement results file can contain data from different sensors. In the “Sensor” drop-down
menu, the user can choose a sensor to display by selecting the unique sensor identification
number.
Initial Stabilization
The first measurements of the algorithm will be taken for sensor stabilization. The “Algorithm
Result” field will indicate how many measurements have been completed during this period.
Raw sensor signals are shown on the “Sensor Signal (Ohms)” plot during this time, but the
algorithm results are only calculated after stabilization. Note that this does not cover the full
stabilization of the sensor module but rather covers only the first minutes during startup.
Recommendation: IDT recommends a sample time of 2 seconds for these 15 measurements
resulting in 30 seconds for the initialization measurements.
Algorithm Result for
“Standard Operation”
and
“Low Power Operation”
After the stabilization measurements, the “Algorithm Result” field shows a colored bar
representing the results from the algorithm. The IAQ rating from the Federal German
Environmental Agency (UBA) and the corresponding IDT IAQ rating are shown.
IDT’s patented smart algorithm will provide eCO2 readings with high accuracy when
activated (default). However, for demonstration reasons it might be useful to disable the
eCO2 algorithm to see very fast CO2 changes directly related to the VOC level.
Algorithm Result
“Odor Operation”
After the stabilization measurements, the “Algorithm Result” field shows a colored bar
representing the results from the algorithm. The Air Quality Change is shown in three
categories:
< 10%
Minor changes or improvement in Air Quality: Control Signal Off
10% to 30%
Slight change in Air Quality:
Control Signal Off
> 30%
Major change in Air Quality: Control Signal On
The threshold is set to 1.3 (default value). This means only a 30% Signal Change will lead to
set the Control Signal to On status.
After the Air Quality has improved the control signal will remain On for 24 samples (2
minutes for default operation) to avoid a hysteresis. This Control Signal triggers the AD5
GPIO pin on the HiCom board and its status is shown in the on/off field.
“Misc”
The drop-down menu adjacent to the “show” button provides options for selecting the time
period for showing the recent history or the complete data. Click the “show” button to apply
new settings to the plots.
The “export data” button will open a file selection dialog for selecting a path to immediately
save the measurement results and the processed algorithm results of the “Analysis” tab. The
file will be saved in comma-separated format (CSV).