Thermo Scientific 49i, Instruction Manual, Page: 53 / 314

Operation
Averaging Time
Thermo Fisher Scientific Model 49
i
Instruction Manual 3-17
Averaging Time
The averaging time defines a time period (10 to 300 seconds) over which
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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 Averaging Time screen for the single range mode is shown below. In the
dual and auto range modes, an averaging time menu is displayed before the
averaging time screen. This additional menu is needed because dual and
auto range modes have two averaging times (high and low). The averaging
time screens function the same way in the single, dual and auto range
modes. The following averaging times are available: 10, 20, 30, 60, 90, 120,
180, 240, and 300 seconds. Additional averaging times are available when
the instrument is in fast cycle time. These averaging times include 4, 8, 12,
24, 36, 48, 72, 96, and 120 seconds. For more information about fast
update times, see “Cycle Time”, later in this chapter.
• In the Main Menu, choose Averaging Time .
• Use and to scroll through a list of choices.
• Press to save the averaging time.
CUSTOM RANGE 1:
CURRENTLY: 550.0
SET TO: 000550.
1 ?
§¨
MOVE CURSOR
©ª
CHANGE VALUE
ƒ
SAVE
RANGE AVG DIAGS ALARM