CDE681 Part 2 lnstallatio | Omega Engineering guide

M3594m0603mCDE681Series.qxd 7/17/03 2:14 PM Page 3

CDE681 Part 2 - lnstallatio

PART TWO - INSTALLATION

SECTION 1 - LOCATION REQUIREMENTS

Locate the sensor as close as possible to the measuring instrument. Do not exceed a distance of 91 m (300 feet) between the sensor and instrument.

SECTION 2 - Mounting

The CDE681-series compression fitting style sensor may be insertion mounted into a pipe tee or vessel fitting. By reversing the compression fitting, the sensor can be fastened to the end of an appropriate length pipe for immersion

mounting. The “longer version ” compression style sensor is intended to be mounted into a ball valve assembly, enabling sensor removal without stopping the process flow. Figure 2-l shows the sensor ’s general dimensions.

CLEAR SHIELD)W/BLACK(SEN

BLACK(SENSE)

RED(DRIVE)

WHITE(TEMP+)

BLUE(TEMP-)

CLEAR(INNER SHIELD

l/2’DIA. FOR

00.5CELL CONSTANT

3/4’DIA. FOR ALL 1

OTHER CELLl/2’OR3/4’CONSTANTS\

I,?OR3,COMPRESSION-V FIrrING

NPT THREADS

Figure 2-l. General Dimensions and Cable Wire Details

2. 1 Insertion Mounting

To ensure optimum measurement performance, follow these guidelines when insertion mounting the sensor:

??Install the sensor into the pipe run so that the process flows directly into the end of the sensor (see Figure 2-2).

??Preferably, mount the sensor in a vertical position to eliminate the possibility of trapped air bubbles from contacting its electrodes which can cause measurement error. This also prevents loose pipe line sediment from accumulating and obstructing the sensor electrodes.