Operation
Averaging Time
3-12
Model 49
i
Primary Standard Instruction Manual
Thermo Fisher Scientific
Averaging Time
The averaging time defines a time period (10 to 300 seconds) over which
O
3
measurements are taken. The average concentration of the readings are
calculated for that time period. The front panel display and analog outputs
are updated every 10 seconds with the calculated averages. An averaging
time of 10 seconds, for example, means that the average concentration of
the last 10 seconds will be output at each update. An averaging time of 300
seconds means that the moving average concentration of the last 300
seconds will be output at each 10-second update. Therefore, the lower the
averaging time, the faster the front panel display and analog outputs respond
to concentration changes. Longer averaging times are typically used to
smooth output data.
The following averaging times are available: 10, 20, 30, 60, 90, 120, 180,
240, and 300 seconds.
•
In the Main Menu, choose
Averaging Time
.
•
Use
and
to scroll through a list of choices.
•
Press
to save the averaging time.
Calibration Factors
Menu
Calibration factors are used to make minor compensations to the O
3
concentration, when the Model 49
i
Primary Standard is being precisely
matched to a NIST traceable O
3
calibrator. The Calibration Factors menu
displays the calibration factors.
•
In the Main Menu, choose
Calibration Factors
AVERAGING TIME:
CURRENTLY: 30 SEC
SET TO: 10 SEC ?
©ª
CHANGE VALUE
SAVE VALUE
RANGE AVG DIAGS ALARM