Ecotech Serinus 44 - 3.4 Measurement and Calibration Settings; 3.4.9 Measurement Settings Menu; 3.4.10 Calibration Menu

Serinus 44 User Manual 3.0
Page 48
3.4.9 Measurement Settings Menu
Main Menu  Measurement Settings Menu
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).
The Kalman filter is the factory default setting. The Kalman filter gives
the best overall performance for this instrument.
Rolling Size
[Rolling filter]
Sets the number of measurements included in the rolling average. Only
available if the Filter Type is set to Rolling.
NO2 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.
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 reading is only valid if zero air or a steady concentration of span gas
has been supplied to the instrument for at least one hour. An invalid
reading will be displayed as ####.
3.4.10 Calibration Menu
Main Menu  Calibration Menu
Calibrating the instrument should be done with care (refer to Section 5 before using these menus).
Cal. Type
Depending on the selection in this field, a number of extra menu items
will be displayed. These are separately documented in Manual Mode
(refer to Section 3.4.10.1) and Timed Mode (refer to Section 3.4.10.2).
Select the Cal. Type field and select either Timed or Manual.
Timed mode is an automatic calibration controlled by the:
 Interval between cycles
 Length of each calibration cycle
 Time when the calibration will begin
 Check only or automatic compensation
Manual mode allows the user to choose the type of calibration they
wish to perform and will open the appropriate valves in preparation for
the user to perform a manual calibration. The setup used will depend
on the Cal. Mode selected.
Manual mode is set as default.
Zero Source
Select whether the instrument will sample from the external calibration