Chauvin Arnoux AEMC DL913, Руководство пользователя, Страница: 17 / 36

Data Logger Model DL913 & DL914 17
2. Press to cycle through the available options.
The options are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60 min.
The aggregation period affects the timing of recorded measurements.
For example, if a recording begins at 12:00 and ends at 1:00 with a 10-minute
aggregation period, the recording will have 6 aggregated measurements. Each
10 minute aggregated measurement reflects the average of the instrument’s
measurements during that period.
Aggregation will only begin and end at clock times evenly divisible by the
aggregation period. For instance, if an hour recording begins at 12:06 and ends
at 1:06 with a 10 minute aggregation period, the first aggregation will begin at
12:10 and end at 12:20. Aggregation will be performed every 10 minutes with the
final aggregation ending at 1:00. Although the recording will continue until 1:06,
no aggregation will be performed for the final 6 minutes.
3.2.3.3 Recording Mode
The Recording mode screen determines whether a recording will run in normal
recording mode or extended recording mode.
In both recording modes, the instrument samples the inputs at a fixed rate every
200 ms and aggregates the samples every second. The data is stored and
displayed as 1 s values that represent trends.
Normal recording mode: The instrument stores a sample every second.
Extended recording mode: The instrument enters a sampling mode where the
selected aggregation period determines the storage interval.
Extended recording mode increases the length of recordings when the instrument
is running on battery power. The instrument stores a sample 4 times per the
selected aggregation period, goes to sleep after recording the sample, and wakes
up 5 seconds before the next sample. This recording mode utilizes single line
cycle storage, so the inputs are ignored between measurement intervals.
For example, if the aggregation period was set to 1 minute, samples would
be stored every 15 seconds. The instrument would be powered down for 10
seconds for a two-thirds reduction in power. However, the decreased storage
interval reduces the measurement resolution.
1. In Configuration mode , use the Up ▲ or Down ▼ button to display the
Recording Mode (rEC) configuration screen.