Teledyne 6600 - Manual (Page 102)

1-12 Part III
Part III Model 6600
Teledyne Analytical Instruments
(CONSULT COMMISSIONING/STARTUP PROCEDURE SEC-
TION IN THE ADDENDUM).
PRESSURIZED INLET SAMPLE DELIVERY
In the case of a high background process stream, the sample is delivered to
the sample cell through the homogenizer/deaerator then SV3 (N.O.) directly
to the measuring sample cell for analysis or to the autozero section filter
assembly section before passing through the sample cell. The return must go
to a 5 psig lower pressure point suitable for maintaining a good dynamic
response of the system as well as providing sufficiently high enough flow to
the sample cell in order to maintain some self-cleaning action minimizing
periodic cleaning of the cell assembly. All standard sample handling compo-
nents selected to contact the process fluid are rated for up to 150 psig (10.5
kg/cm2g). Any pressures higher than this could cause failures and pose an
unsafe condition. It is the customers responsibility to assure the inlet(s) nor
return point(s) do not exceed 150 psig.
In the case of a clean stream, only sv2 and sv1 are used for zero purposes
and are N.O. to allow sample to return to a lower pressure point. This return
point must be at least 10 psig lower than the inlet takeoff (when no pump is
used); otherwise no flow will occur through the system.
NO PRESSURIZED INLET FOR SAMPLE DELIVERY (PUMP
REQUIRED)
When no sample pressure is available either the customer or TAI will have
provided a suitable pump for the delivery of the process fluid.
GRAVITY FEED SYSTEM (Suitable on clean water application only)
For gravity feed systems, the user must provide sample from a suitable head
so as to continuously deliver sample through the highest internal sample
system point of the TAI sample system based upon its commisioned intended
location. The gravity return point must also be suitably below this high point
so as to render sufficient continuous flow through the system.
CALIBRATION SAMPLE DELIVERY
On each side of the sample cell, v5 (before cell) and v6 (after cell) 3-way
valves (followed by v7 an adjustable safety needle valve to a grab safety
port) are placed so as to allow gravity fed entrance of calibration fluids
prepared with the calibration kit (A48715). Sample is blocked off by these
valves and calibration samples prepared can be poured into the zero/span in
calibration reservoir and allowed to flow through the sample cell while