Vigilantplant TDLS8000, User Manual

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<3. Installation, Wiring, Optical Axis Adjustment, and Piping>
3-33
IM 11Y01D01-01EN
A A
N
2
gas N
2
gas
Flow cell
Exhaust Exhaust
Exhaust Process gas
Sealing plug Sealing plug
LU side SCU side
Sealing plug Sealing plug
Figure 3.25 Piping when not using the validation function
(2) When using the validation function
If the application uses a flow cell and the validation function, connect the piping as shown in
Figure 3.26.
The piping for analyzer internal purge is the same as “(4) When using a process isolation flange
and the validation function.” Feed nitrogen gas through purge port A in Figure 3.26 for both the
LU and SCU. For the SCU, since check gas needs to be fed during validation, connect the piping
with a three-way valve so that the gas can be switched between nitrogen gas and check gas.
Process window purge is not used. The flow cell is purged directly with the process gas.
N
2
gas
Checking gas
N
2
gas
Flow cell
Exhaust Exhaust
Exhaust Process gas
Sealing plug Sealing plug
LU side SCU side
Switching valve
A A
Sealing plug Sealing plug
Figure 3.26 Piping when using the validation function
3.4.3 Purge Gas Piping for Explosionproof/Flameproof type
In Explosionproof/Flameproof type TDLS8000 (TDLS8000-C1, D1, E1 and S1), analyzer internal
purge area, that is laser module area and detector module area, described in 3.4 are divided
into two areas by explosion protection window as shown Figure 3.27. When using Explosion
proof/Flame proof type, piping for purge gas should be connected to each area separately. For
validation, SCU area and LU area are used.
3rd Edition: Jun. 10, 2016-00