See the Vented Dataloggers User Guide for detailed AquaVent operating instructions.
The AquaVent logger has the ability to record and store readings in internal memory, independent from the MODBUS network. Before connecting the AquaVent to the MODBUS network, it can be programmed and started using Solinst Levelogger PC Software (see Figure 3-1).
Once you are finished programming your AquaVent, unplug the USB Connector Cable from the Wellhead. The Wellhead only communicates with the MODBUS network when just the RS-232 or RS-485 Connector Cable is connected.
All standard sampling options provided by Solinst Levelogger PC Software are available while the AquaVent is operating in a MODBUS network. The AquaVent logger can be set to record at a user-defined sampling rate; event, linear, and scheduled sampling modes are available. This allows the AquaVent logger to provide back-up data if the MODBUS network fails. The AquaVent stores the data in its internal memory, until it is downloaded.
Each time the MODBUS master asks the AquaVent for a current reading, the Wellhead batteries are used to transmit the information from the logger to the Wellhead. The AquaVent logger will also be using the batteries if programmed to record independently - draining the batteries more quickly.
The Wellhead batteries will drain more quickly if the AquaVent logger is also set to record independently.