DGA monitor warms up during the first three measurement cycles. Measurements
made during the warm-up cycles are not guaranteed to be within the accuracy
specification.
4.7 Uninstalling DGA monitor
• Adjustable wrench
• Screwdriver with 3-mm-wide (0.12‑in) slotted head
• 5-mm Allen key
• Swagelokâ plugs for oil connector fittings (2 pcs, Swagelok part no. SS-10M0-
P (316 Stainless Steel Plug for 10‑mm Swagelok Tube Fitting))
• Container for waste oil with at least 5 liter (1.3 gallon) capacity
• Oil absorption material for controlling possible leaks
• Rags for wiping o oil
Wear protective eyewear and gloves.
Follow this procedure to uninstall the DGA monitor. Uninstallation empties the DGA monitor of
oil and allows it to be safely stored and transported.
The procedure assumes that the DGA monitor is completely installed and currently measuring
when the uninstallation is started. The complete procedure may take up to 3 hours. If the DGA
monitor is already in Standby mode, you can skip step 4 and step 5.
Do not transport the DGA monitor without uninstalling it properly:
• If the oil connections are not properly plugged, oil will drain out from the DGA
monitor during transport.
• Oil may contaminate the optical measurement module during transport
unless you complete the uninstallation procedure successfully and lock the
bleed valve manually.
CAUTION!
1. Check that the oil lines between DGA monitor and transformer are intact.
2. Check that the oil intake and return valves on the transformer side are open.
3. Connect to the DGA monitor user interface and log in as an Admin user.
4. Stop the measurement mode by selecting Control > Stop Measuring.
5. Wait for DGA monitor to enter Standby mode. Depending on the stage in the
measurement cycle, stopping may take up to 60 min.
OPT100 User Guide M211858EN-U
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