Spartan 821/721 Manual Managing SD Card Storage 36
About File Naming Conventions
The meter files are easily identified by the “.LD7” extension. The meter automatically
names saved files according to the following nine-digit convention: two digits each for the
year, month, and day, followed by three digits to uniquely identify each file (up to 999,
then alphanumeric up to ZZZ). For example:
FIGURE 4-2 Two digits for year, month, day; three for unique ID
4.1.1 Viewing a Measurement Data File
To view measurement data files, connect to the meter via G4 LD Utility by using your PC.
LEARN MORE For more information, view the G4 LD Utility Manual in G4 (Help
Manuals G4 LD Utility) or from www.LarsonDavis.com.
4.2 Managing SD Card Storage
CAUTION Do not attempt to remove the microSD card while the meter is powered
on. This may result in data corruption or complete loss.
CAUTION Do not open the microSD card access door while the meter is powered on.
This increases the risk of internal damage to the meter due to electrostatic
discharge (ESD).
The meter is compatible with many microSD cards. We recommend the following best
practices when interacting with microSD card storage:
• Choose an industrial-quality card, such as the one included with the meter
• Connect the meter often in G4 LD Utility; files downloaded to a PC via G4
provide reliable backup storage
• Discharge static buildup from your body each time before opening the microSD
card access door
• New microSD cards must be formatted for use with the meter as described in
4.2.1 Preparing a MicroSD Card For Use
• MicroSD cards filled to capacity may be reformatted for use with the meter as
shown in 4.2.1 Preparing a MicroSD Card For Use
• See A.1.14 Data Storage Specifications for more details about microSD card
sizes that can be used
LEARN MORE For more information about G4 and backing up data files, view the G4
LD Utility Manual in G4 (Help
Manuals G4 LD Utility) or from
www.LarsonDavis.com.
Year
Month
Day
Unique
721 or 821 files
230726016.LD7
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