Omega RD-MV100 Series, Руководство пользователя

Страница: 165 / 299

8-6
Number of Data Points that can be Acquired and Sampling Length (The Maximum Auto
Save Interval for Display Data, the Maximum Data Length for Event Data)
This section describes the number of data points of the display data/event data that can
be acquired and the sampling length. Use the information when determining the amount
of time it takes for the internal memory to become full or when deciding the channels to
be acquired or the sampling interval.
The possible range of menus of the auto save interval of display data and the data length
of event data is displayed in the soft keys based on the information described here.
Data format
The display data have minimum and maximum values for each sampling interval. Event
data consists of instantaneous values.
The number of data bytes per channel is shown in the following table.
Data Type Measurement Channel Computation Channel
Display data 4 bytes/channel 8 bytes/channel
Event data 2 bytes/channel 4 bytes/channel
Example
Data format when the data of measurement channels 1 to 4 and a computation
channel 31 are acquired.
Display data
CH1
min
2 bytes (binary data)
CH1
max
1st scan
CH2
min
CH2
max CH3
min
CH3
max CH4
min
CH4
max
2nd scan
nth scan
CH31
min
CH31
max
CH1
min
CH1
max CH2
min
CH2
max CH3
min
CH3
max CH4
min
CH4
max
CH31
min
CH31
max
CH1
min
CH1
max CH2
min
CH2
max CH3
min
CH3
max CH4
min
CH4
max
CH31
min
CH31
max
to
Event data
2 bytes (binary data)
1st scan
CH31
CH1 CH2 CH3 CH4
CH31
CH1 CH2 CH3 CH4
CH31
CH1 CH2 CH3 CH4
2nd scan
nth scan
to
Internal memory capacity
The capacity of the internal memory that is used for data storage is 1.2 MB. The internal
memory is allocated depending on the acquired data as follows.
Data being Acquired Internal Memory Capacity
Display data only 1.2 MB
Display data and event data Display data : 0.9 MB
Event data : 0.3 MB
Event data only 1.2 MB
8.2 Function to Acquire Display Data and Event Data