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Installation & User Guide
4. Verify DGA-LT1 housing is free from external cracks
5. Note the DGA-LT1 serial number
6. Have all tools and bleed tube and container for oil collection ready
DGA-LT1 Installation steps
1. Check to make sure drain valve is closed. Failure to close the drain valve could drain a significant
amount of the transformer oil and cause personal or environmental harm.
2. Remove the existing plug from the transformer drain valve and the plastic shipping cap from the LT1.
Save both.
3. Clean any debris (Teflon tape, pipe thread sealant and excess oil etc.) from the valve threads with a
small (nylon) brush.
4. Wrap the threads of the DGA-LT1 with extra high density Teflon tape (0.0032" or ~0.08 mm thick) and
a thin layer of PTFE pipe-thread sealant.
5. Thread the DGA-LT1 sensor into the transformer drain valve, starting the threads by hand.
6. Tighten the monitor with a 1 3/8-inch or adjustable wrench until the bleed valve is vertical.
7. Clean off any extra pipe thread sealant or oil from where the monitor mounts to the valve.
8. Power on the DGA-LT1 monitor by pressing the power button.
9. Wait 1 min and press and hold the manual sample button on the back of the unit for 1 second.
10. Using the QualConnex website, verify that the unit has made successful communication with the
QGateway unit, and the data has been reported to the cloud. It can take up to 15 min for data to appear
depending on the QGateway distance and cellular activity.
Figure 19 below shows an installed DGA-LT1 on a 1" drain valve.
Figure 19: DGA-LT1 installed on 1" Drain Valve
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