Sampling Process; Figure 7-4: Manual Oil Sampling Process - GE TRANSFIX DGA 500 User Manual

Transformer oil, dissolved gas and moisture monitor
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7.2 Sampling Process

Open the door of the product and observe the operating mode on the LCD display panel.
The flowchart shown in Figure 7—4 and the accompanying steps summarise the process
to obtain a manual oil sample.
Standby mode
Measurement mode
Figure 7—4: Manual oil sampling process
See Section 6.1 for product display panel information.
MA-014 - TRANSFIX DGA 500 User Guide – Rev 1.1
Use TransConnect
to stop a
measurement
Oil Drains
Standby mode
Remove plug from
¼ in. ball valve
Attach PTFE tubing
to1/4 in. ball valve
Attach other end of
tubing to stopcock
Attach equipment
to stopcock e.g.
syringe
Open ¼ in. ball
valve and take oil
sample
Replace plug on ¼
in. ball valve
1.
If the product is in Standby mode,
proceed to step 3. If the product is
in Measurement mode, either wait
until
the product returns
Standby
mode
TransConnect software to stop the
active measurement cycle.
2.
If an active measurement is
aborted, oil may remain in the
headspace. The display reads "
". Wait several minutes for
DRAINING
the draining process to complete
and for the product to return to
Standby mode.
3.
Once the product returns to
Standby mode, remove the plug
from the ¼ in. ball valve.
4.
Take the PTFE tubing and connect
it to the ¼ in. ball valve (see Figure
7—2 to Figure 7—3).
5.
Remove the Luer fitting cap from
the other end of the PTFE tubing
and attach the supplied stopcock.
6.
Connect
the
sampling
equipment
stopcock e.g. syringe and perform
the oil sampling.
7.
Open the ¼ in. ball valve to allow
oil to flow to the sampling point.
8.
When finished sampling, shut off
the ¼ in. ball valve to stop the oil
flow.
9.
Disconnect
the
arrangement.
10.
Replace the plug on the ¼ in. ball
valve.
13-Oct-15
to
or
use
the
OIL
remaining
oil
to
the
oil
sampling
Page 21 of 28

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