Teledyne Deltaflow DF180, Operation And Maintenance Manual, Page: 33 / 42

January, 2018
Page 33
6.4 Filter Media Replacement Procedure
These filters should rarely come in contact with actual stack gas. Since periodic blowback is done every
6 hours at minimum, the sample lines stay filled with instrument air for the most part. Because of this,
all the components on the instrument panel should only come in contact with clean dry instrument air
99% of the time. So these filters should last 1 to 2 years. When they do need to be replaced, follow this
procedure:
1. Put the DeltaFlow into Maintenance mode.
2. Click the
Impact Blowback
and
Static Blowback
buttons in the
Control
screen. This will isolate
the filters from the impact and static pressure lines.
3. The filters can then be removed from the plumbing to change out the media.
4. Remove the used media and store in a container for disposal.
5. Refill the canisters with TML P/N 99705000-2. Do not overfill.
6. Click the
Impact Blowback
and
Static Blowback
buttons in the
Control
screen.
7. Perform a leak check on the panel, see section 6.5.
6.5 System Leak Test Procedure
CAUTION: Wear gloves when sliding Leak Check Kit tubing onto the tip of the Pitot Tube. The tip of
the Pitot tube is sharp!
It is important to ensure the entire pneumatic sampling system is leak free. This includes the probe,
sample line, and all the instrument panel plumbing. To check this, use TML P/N 99701100-1 (DF180
Leak Check Kit) and follow the procedure below. This procedure requires a person at the probe location
and another person at the instrument panel.
1. The probe person disconnects the impact and pressure lines from the Pitot tube.
2. Make sure the syringe is pulled out. Connect the leak check device to the impact line.
3. Slowly inject the syringe plunger while the instrument panel person observes the DP transmitter
gauge display.
4. The person at the instrument panel notifies the probe person to shut the leak check kit isolation
valve when the DP reading has reach a level approximately 75% of the full scale of the gauge
display.
5. Once the leak check valve is closed, observe the DP reading on the gauge display and make sure
it remains stable for 30 seconds.
6. Repeat the process for the static side by connecting the leak check kit to the static line, but this
time ensure the plunger is pushed in before connecting.
7. The probe person slowly retracts the plunger while the instrument panel person observes the
DP gauge. Isolate and check for stability as in steps 4 – 5.
8. Reconnect lines to probe.
This procedure does not check the probe for leaks. Since the probe is made of seamless stainless
steel it is unlikely to have leaks. In the event a leak in the probe is suspected, it can be incorporated