Emerson PN-51-T56 instruction manual Installation Debubbler Assembly

Instruction Manual	Clarity II T56
PN-51-T56	May 2012

2.3Installation – Debubbler Assembly

See Figure 2-3 for installation.

Connect the sample line to the inlet fitting. The fitting accepts 1/4-inch OD tubing. See Section 2.6 for recommended installation of the sample port.

Attach a piece of 3/8 inch ID soft tubing to the drain fitting. The debubbler must drain to atmos- phere.

NOTE:

During operation, the debubbler is under pressure. A 0.040 inch (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.

WARNING

Before removing the sensor, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is lowered to a safe level!

The amount of pressure in the debubbler can be estimated from the flow rate. See Table 2-1.

To control and monitor sample flow, a valved rotameter with fittings is available (PN 24103-00). Attach the rotameter to the debubbler outlet. The rotameter can also be used to increase back pressure on the debubbler if additional pressure is needed to prevent outgassing.

TABLE 2-1. Approximate debubbler pressure as a

function of flow (0.040 inch outlet orifice)

gph	psig
2	1
4	3
6	8
8	14

1021

1126

1231

––

mL/min	kPa abs
100	110
200	120
300	140
400	160
500	190
600	240

700280

800340

8 Ordering Information