Debubbler And Measuring Chamber - Emerson Clarity II Instruction Manual

MODEL CLARITY II
9. Place the sensor in the calibration cup and reconnect the cable.
10. Calibrate the sensor using either slope or standard calibration (Section 6.2 or 6.3). Do not use grab calibra-
tion. Failure to calibrate the sensor may reduce the life of the sensor. See Sections 8.2.5 and 8.2.6.

7.3 DEBUBBLER AND MEASURING CHAMBER

7.3.1 Cleaning the debubbler and measuring chamber
1. Turn off the sample supply to the debubbler.
BEFORE DISCONNECTING THE SAMPLE AND DRAIN LINES OR
REMOVING THE SENSOR, be absolutely certain the process pressure is
reduced to 0 psig and the process temperature is at a safe level.
2. Remove the sensor and put it in a safe place. The calibration cup is a good place to store the sensor.
3. Loosen the small drain plug in the base plug and allow the sample in the debubbler to drain out. See Figure
7-4. Replace the drain plug.
4. Unscrew the upper and lower caps. Be careful not to lose the O-rings.
5. Use a stream of water, a brush, or a rag to flush and clean out the inside of the debubbler and measuring
chamber.
6. Inspect the O-rings for signs of damage and replace if necessary. The part number for the O-ring (one each)
is 9550316.
7. Replace the upper and lower caps.
8. Replace the sensor.
7.3.2 Cleaning the orifice
1. Turn off the sample to the debubbler.
2. Disconnect the drain line. Unscrew the drain fitting from the orifice; then unscrew the orifice from the debub-
bler body. See Figure 7-4.
3. Use a stream of water to flush out any residue accumulated in the orifice. Direct the stream of water counter
to the normal flow through the orifice.
4. If the material plugging the orifice cannot be removed with flushing, use a toothpick or a stiff wire to push out
the obstruction. Push counter to the normal flow through the orifice.
5. Reinstall the orifice and reconnect the drain line. Turn on the sample flow.
6. If the blockage cannot be removed or the orifice is damaged during cleaning, replace the orifice (PN 33947-00).
CAUTION
SECTION 7.0
MAINTENANCE
49