Emerson 381 instruction manual Section Ultrasonic Cleaner

MODEL 381pH/ORP	SECTION 4.0
	ULTRASONIC CLEANER

SECTION 4.0

ULTRASONIC CLEANER

4.1ULTRASONIC CLEANER (P/N 22727-00). This accessory provides an ultrasonic cleaner and mount- ing hardware for either continuous or inter-mittent cleaning of the measuring electrode and liquid junction on the Model 381. The information in the following paragraph is supplemental to the information in Sections 1.0 thru 3.0.

4.2SPECIFICATIONS. The ultrasonic cleaner oper- ates on either 115 Vac or 230 Vac, 50/60 Hz. The mode is jumper selectable within the generator enclosure. The generator is shipped in the 115 Vac configuration.

4.3INSTALLATION. The ultrasonic generator is shipped with special cushioning material. Before open- ing the container or removing any packing material, all items should be inspected for any possible shipping damage. If any damage is found, the carrier should be notified. Check the generator enclosure for damage to the finish; loosen the door clamps and inspect the cir- cuit board and components. If there is apparent dam- age, contact the carrier for instructions. The packing container and cushioning material should be retained should it ever become necessary to return the genera- tor to the factory. Install the ultrasonic cleaner as fol- lows:

1.Mechanical Installation. Although the generator is designed to be located in a process environ-ment, corrosive atmospheres and excessive vibration should be avoided if possible. The ultrasonic transducer is shipped loose along with mounting hardware and mounting instructions. Check to make certain all connections are secure. Refer to Figure 4-1 and 4-2 for mounting dimensions and select a convenient location for the generator.

2.Electrical Installation. An external line switch should be installed to disconnect power from the generator for maintenance or periods of non-use. Apply input power (refer to Figure 4-2) as follows: Ground to TB1-8, hot to TB1-6, and neutral to TB1-7.

CAUTION

Make sure the 115/230 jumpers on the transformer are in the proper position for the supply voltage being used. The gener- ator will be seriously damaged if 230 Vac is supplied with the jumpers in the 115 Vac position.

The power output is approximately 1400 volts at 0.002 amp, at a frequency of 40 to 45 kHz. The transducer is supplied with 20 feet of interconnecting cable in a polypropylene protective sheath. Output connections are made at TB1-4 for R.F. (+) and TB1-2 for RF(-). Make sure the AC power line ground is properly con- nected to the generator’s input terminals.

CAUTION

Do not run any ultrasonic cleaner power, wiring input or output, in the same conduit as the signal wiring from the sensor.

4.4OPERATION. Submerge the sensor into sample and start the sensor as instructed in Section 2.0. After measuring system is in operation, apply AC power to the ultrasonic cleaner. Over a period of time (usually several days), gradually increase the gain until the power setting is sufficient to keep the electrodes free of process buildup.

CAUTION

Increase gain slowly and apply only the necessary amount of power. Excessive power may damage the electrode. Once initial start-up is complete, further adjust- ment or calibration is not normally required unless there are drastic changes in the composition of the process sample.

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