ABB TB404, Руководство по эксплуатации, Страница: 28 / 40

PROCEDURE
PR3 - 3
Example: 1. Temporarily insert the sensor assembly into the process receptacle.
2. Set the insertion rod to the proper depth and orientation according to the
installation guidelines described in
Section 2 or measure the distance from
the end of the process receptacle to the desired sensor location.
3. Set the insertion length of the assembly to the measured length assuming
at least five threads of engagement on the male threads of the sensor
assembly.
4. Permanently mark the insertion rod with either a permanent marker, paint
or scribe at the intersection of the rod and the compression nut.
5. Make a second mark perpendicular to the first mark that corresponds to the
position of the sensing area of the sensor according to the installation guide-
lines described in
Section 2 .
To install the sensor hardware:
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1. Loosen the compression fitting (Fig. PR3-1 ).
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2. Position the sensor against the compression fitting body or extraction
housing (Fig.
PR3-2 ) by pulling the insertion rod until the assembly stops
moving
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3. Hand tighten the compression fitting to prevent the insertion rod and
sensor from moving during the remaining steps.
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4. Apply high temperature pipe sealant to the unused pipe threads of the
1½ in. NPT nipple attached to the ball valve.
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5. Install the nipple into the piping or tank receptacle using a pipe wrench.
NOTE: This fitting must have a female 1½ in. NPT thread..
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6. Tighten the fitting and position the ball valve to the required orientation.
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7. Close the ball valve and pressurize the process pipe or tank.
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8. Check for leaks.
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9. Ensure that the sensor is against the compression fitting and that the fit-
ting is tightened.
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10. Open the ball valve.
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11. While holding the insertion rod tightly to prevent kickback, loosen the
compression fitting.
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12. Push the insertion rod into the process until the desired insertion is
reached.
W2
W2