Service Serinus 51 User manual 1.0
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6.4.3 DFU Replacement
1. Turn off analyzer and remove power
2. Remove Kynar nut from the end of the DFU by turning anti-clockwise
(looking from DFU side)
3. Replace DFU and ensure that the flow is in the correct direction (arrows
points toward Kynar nut)
4. Tighten kynar nut clockwise
6.4.4 Sintered filter Replacement
The sintered filter is used to prevent contaminants blocking the sample
orifice. Sintered filters should be changed per year
1. Turn off the analyzer and disconnect the pump
2. Disconnect the tubing from the T-piece on top of the measurement cell
(Figure 24)
Figure 24 Measurement cell T-piece
3. Unscrew the T-piece form the cell (anti-clockwise)
4. Once the t-piece has been removed use the orifice/filter removal tool to
remove either the orifice and/or filter
5. Orifice and filter maybe exchanged with new ones or cleaned as needed.
6. Replace the filter and/or orifice in the correct part of the T-piece and
replace the T-piece as before.
7. Perform a calibration
6.4.5 Quick Leak test
This procedure is designed to determine if the instrument pneumatics has
a leak, this initial check. If the instrument passes the check then no
further leak checks are needed, if it fails a full leak check will be
required.
1. Enter main menu Diagnositcs Valve menu and set valve
sequencing to off. Then open all the valves in that menu
2. Plug both the “Sample port” and the “Calibration port” (see Figure 25
below)
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