ezPyro
TM
Flame Detection Evaluation Kit User Manual
Page 8 of 18
© Copyright Pyreos Ltd. 2020
ezPyro
TM
User Manual Rev. 3.1
Figure 9: Evaluation Kit settings page
Sampling Period: Select how often to retrieve information to be displayed and used in the Flame Detection
algorithm. Make sure this is set so that the signal frequencies of interest are significantly smaller that the sampling
frequency. This is restricted in the ezPyro
TM
Flame Evaluation software so that the combination of sample rate and
power mode do not result in a sample frequency less than 60Hz as the FFT plots are set up to allow 0 to 30 Hz range.
For greater flexibility with the sample rate please use the ezPyro
TM
Evaluation Tool available on the standard USB
stick supplied with all Evaluation kits. The ezPyro
TM
Evaluation Tool will provide raw data recording only.
Gain Settings: The gain for the amplifier is set by selecting a capacitor to be used in the charge amplifier inside the
ezPyro
TM
package. The gain is proportional to 1/Capacitance but has been normalized with respect to minimum gain
value on the settings screen.
High Pass: The high-pass filter allows signal filtering within the ezPyro
TM
package before transmitting data to the MCU.
Low pass: The low-pass filter allows signal filtering within the ezPyro
TM
package before transmitting data to the MCU.
Transimpedance: The transimpedance setting is used to set the resistance of the feedback resistor in the gain
amplifier. It works together with the capacitance value chosen to set the time constant of the gain amplifier through
the RC response of the two parameters.