Emerson Rosemount Clarity II T56, Reference Manual

Page: 22 / 60

CAUTION
Reading errors
During operation, the debubbler is under pressure. A 0.040 in. (1 mm) orifice in the
outlet provides the pressure. Back pressure helps prevent outgassing, which can
lead to bubbles accumulating on the sensor face, resulting in erroneous readings.
Do not exceed 30 psig (308 kPa abs) inlet pressure.
The amount of pressure in the debubbler can be estimated from the flow rate. See
Table 2-2 .
Table 2-2: Approximate Debubbler Pressure as a Function of Flow (0.040 Inch
Outlet Orifice)
gph psig mL/min kPa abs
2 1 100 110
4 3 200 120
6 8 300 140
8 14 400 160
10 21 500 190
11 26 600 240
12 31 700 280
-- -- 800 340
To control and monitor sample flow, a valved rotameter with fittings is available
(PN 24103-00).
3. Attach the rotameter to the debubbler outlet.
You can also use the rotameter to increase back pressure on the debubbler if
additional pressure is needed to prevent outgassing.
Install Reference Manual
July 2020 00809-0100-3565
22 Emerson.com/Rosemount