ABB RATOSIGHT 10A2235 사용 설명서 - 페이지 3

{카테고리_이름} ABB RATOSIGHT 10A2235에 대한 사용 설명서을 온라인으로 검색하거나 PDF를 다운로드하세요. ABB RATOSIGHT 10A2235 5 페이지. Variable area flowmeters

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Installation

The RATOSIGHT flow rate indicator is normally fur-

nished for horizontal connections. However, vertical

connections or combination horizontal-vertical con-

nections may be made by changing the locations of

the pipe plugs. Thus an over alarm extension can be

added to the Meter using a horizontal outlet. If the

Meter has a vertical inlet, a nipple and union should

be added to facilitate future removal of the float, The

various piping arrangements are shown in Figure 2.

Refer to Figure 4 for the outline dimensions of the

Meter. Install the Meter in the piping system so that

the tube is vertical. The Meter should be as free as

possible from piping strains. When installing large

indicators, use brackets or piping supports to elimi-

nate piping strains.

Operation

Start flow thru the Meter slowly to avoid excessive

flow surges which might damage the float or tube.

Flow rate is read from the scale at a point opposite

the grooved horizontal line on the float. When milli-

meter or other special scales are furnished, a cali-

bration curve may be supplied. By entering the

indicated value on this curve, the actual flow rate

can be obtained. If an alarm extension has been

furnished, refer to the appropriate Instruction Man-

ual to set the alarm point.

Maintenance

Normal maintenance consists of cleaning the float

and tube to maintain good visibility. If the meter inlet

is connected vertically, the inlet piping must be

separated to remove the float. Remove the float and

tube by taking the inlet fitting from the bottom of the

meter.

If the float is received separately from the instru-

ment, insert it in the tube after removing the inlet

fitting. Figure 3 shows the correct float orientation

and the reading edges. If the RATOSIGHT flow rate

indictor is equipped with an alarm extension, com-

plete the wiring as discussed in the alarm's Instruc-

tion Bulletin.

FIGURE 2. PIPING ARRANGEMENTS

WARNING

An operator protective shield is required

when this meter is used for compressed

gases or liquids above their boiling

point. A sheet of polycarbonate can be

used as a shield. Alternately, a series

10A4500 meter with a protective shield

included or an all metal meter can be

substituted.

Caution

Exercise care when removing the inlet

fitting as the float and tube are free to

fall out of the meter body. Clean the

float and tube carefully with a suitable

solvent (detergent and water are usually

satisfactory), then replace the parts. To

disassemble the meter completely,

remove the float as outlined above, then

the outlet adaptor ring may be

withdrawn from the meter body. During

meter re-assembly it is recommended

that new "O" rings be used.