PROGRAMMING
4-24
4.6.4
Change Average Type
The user can select either an 8-hour Time Weighted Average
(TWA) or a running Average. The running average is simply
the average of all instantaneous (1-second) readings since the
measurement was started. This average may increase or
decrease with time depending on the readings. The TWA is a
cumulative value used to estimate the fraction of the 8-hour
limit to which the user has been exposed since the start of the
measurement. This value can only increase or remain constant,
never decrease. Refer to Technical Note 119 for more
information on how TWA is calculated.
1.
“Change Average Type?” is the sixth sub-menu in the
Datalog sub-menu.
2.
Press the
[Y/+]
key to enter the function.
3.
The display will show “Running Average?” or “ Time
Weighted Average?” depending on the current average type.
4.
Press
[N/-]
key to toggle between the average types. Press
[Y/+]
key to select the displayed average type.
5.
If there is any change to the existing setting, the display
shows “Save?” Press
[Y/+]
to save the change. Press
[N/-]
or
[MODE]
to discard the change and return to the first sub-
menu.
Summary of Contents for MiniRAE 2000 PGM-7600
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