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NOTE!
The DataSnap is not weatherproof. If used outdoors, the DataSnap must be mounted in a weatherproof
enclosure similar to the one shown below.
Photograph courtesy of Polycase, Inc.
Using Acclima SnapView Software
The Acclima SnapView software provides four important functions:
1.
DataSnap configuration
–
configuring a DataSnap for operation
2.
Automatic data synchronization
–
data retrieval from all connected DataSnaps
3.
Manual sensor reading
–
user-initiated sensor readings
4.
Data analysis
–
synchronized sensor data analysis
Configuration
A DataSnap must be configured prior to its first use. The SnapView software guides you through the configuration process
in a few simple steps. To access the Configuration screen
, click on the ‘Config’ button at the top of the screen. This will
display the Configuration wizard.
The SDI-12 protocol requires that a sensor be given a specific address. All communication with a sensor is based on this address.
When a sensor is added to a DataSnap, the sensor’s address is stored in the DataSnap. This is how the DataSnap knows which
sensors to read. It is important to understand that if a DataSnap has been configured and is then connected to a different set of
sensors, the configuration must be changed accordingly. If this is not done, data from two sensors may become merged and there
will be no way to know which reading came from which sensor. This can occur when a sensor from the original set and a sensor
from the new set share the same address. The DataSnap reads sensors by address (an SDI-12 limitation) and returns data for the
serial number of the configured sensor. The DataSnap does not know that the sensor is not what was originally configured.
Performing a sensor validation can assist with this.
Figure 8