Ecotech Serinus 40 - 3.5.10 Measurement Settings

Serinus 40 User Manual 2.2
Page 48
3.5.10 Measurement Settings
Average Period
Set the time period over which the average will be calculated:
minutes (1, 3, 5, 10, 15, or 30) or hours (1, 4, 8, 12, or 24).
Filter Type
Sets the type of digital filter used (None, Kalman, 10 sec, 30 sec, 60
sec, 90 sec, 300 sec or Rolling).
Note: The Kalman filter is the factory default setting and must be
used when using the instrument as a U.S. EPA reference method or
to comply with EN certification. The Kalman filter gives the best
overall performance for this instrument.
Rolling Size
Sets the period for the rolling average if the Filter Type is set to
Rolling.
NO
2
Filter
When enabled this function will apply a low pass digital filter to
NO
2
measurement removing any artificial signal resulting from
pneumatic differences between NO and NO
X
gas lines.
Note: this function must be set to disabled for U.S.EPA approval.
Noise
The standard deviation of the concentration. The calculation is as
follows:
 Take a concentration value once every two minutes
 Store 25 of these samples in a first in, last out buffer
 Every two minutes, calculate the standard deviation of the
current 25 samples. This is a microprocessor-generated field
and cannot be set by the operator
Note: This reading is only valid if zero air or a steady
concentration of span gas has been fed to the analyser for at least
one hour.