5 Hardware connections
The SQM-LU-DL requires one connection to a USB hub or a PC for configuring the device and recovering the readings
as shown in Figure 5.1.
Figure 5.1: Wired connection
The maximum length cable per the USB specification is 15ft (3m). USB extenders exist on the market, some work up
to 198ft (60m).
A battery adaptor with batteries is supplied to allow the SQM-LU-DL to perform data-logging while disconnected from
the computer. This battery connection replaces the USB connection from the computer as shown in Figure 5.2.
Figure 5.2: Battery connection
5.1 Battery operation
The SQM-LU-DL may be operated by an external battery using the supplied “battery to USB adaptor”. The lifetime of
the battery can be determined as shown below. This calculation is also performed and displayed by the UDM software
on the “Data Logging” panel. Figure 5.3 shows experimental results of the current profile using a 10Ω current shunt.
20
Summary of Contents for SQM-LU-DL
Page 2: ......
Page 17: ...17...
Page 19: ...Figure 4 1 Front and back of of unit Unihedron SQM LU DL Operator s Manual 20220119 19...
