METER ZL6 - Data Storage; Zentra Cloud Communications (ZL6 and ZL6 Pro)

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ZL6
Data collected by the ZL6 uses the UTC time for the timestamp on each saved sensor record.
ZENTRA Utility and ZENTRA Cloud display these data using local time based on where the
logger is installed.
3.2.8 DATA STORAGE
The ZL6 only stores data for sensor ports that are configured for sensors (Section3.2.1).
The ZL6 Basic stores 2 MB of data and the ZL6 and the ZL6 Pro store 8 MB of data. When
the logger has filled its memory, it begins overwriting the oldest data in the memory. Data
storage capacity varies between approximately 6 months to several decades depending
on the logger, connected sensors, and set measurement interval. ZENTRA Utility software
displays how many days of data the ZL6 can hold based on the current measurement interval
(Section3.2.2), sensor configuration, and previously storeddata.
The ZL6 data memory is nonvolatile flash. Removing the batteries or rebooting the logger
(Section3.2.3) will not erase stored sensor measurement data.
The ZL6 stores encoded data for each sensor to make data storage and transmitting
convenient. ZENTRA software automatically decodes the sensor data to display them correctly.
3.2.9 ZENTRA CLOUD COMMUNICATIONS ZL6 AND ZL6 PRO
The ZL6 has built-in communication hardware for reporting sensor measurement data
to ZENTRA Cloud. This allows for near real-time monitoring of the environment at the
measurement site.
The ZL6 powers the communication hardware only long enough to upload the data
collected since the last time the logger successfully reported. During these upload times
the ZL6 transfers data to ZENTRA Cloud, retrieves any pending settings changes, and
occasionally performs operating system update to the logger.
For ZL6 units with cellular hardware, upload session frequency and timing can be
changed in ZENTRA Utility (Section4.2.5.1) or ZENTRA Cloud. The default setting is for
the ZL6 to upload data once per hour at a random time within each hour of the day at
optimal hours. Less frequent uploads conserve battery power.
Contact Customer Support if more frequent uploads are needed.
The ZL6 is available with several versions of cellular communication modules. Please
contact Customer Support or a METER sales partner for more information on the
configuration that is best for the location where you plan to deploy the instrument.
For ZL6 units with Wi-Fi hardware, the logger will upload data within several minutes of
storing the data. The frequency and timing of these uploads are not adjustable.