Oval EX DELTA, EX DELTA-DIA, Руководство пользователя

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D-546-9-E
11. MAINTENANCE
11.1 Sensor Replacement
11.1.1 Fixed Sensor Removal
CAUTION: The sensor is a pressuretight member. Be sure therefore to stop
the flow and reduce the line pressure to zero when you remove it. A leak
check is suggested after sensor replacement for added safety.
PROCEDURE See Sec. 14.1 Fixed Sensor Exploded View
and Parts List on pages 39 and 40.
① Turn off “POWER” switch on the display board (see
Fig. 6.11 on page 18).
② Remove cover (310) on the terminal box (see page
18).
③ In the separately-mounted type, disconnect the
cable for external wiring connections.
④ Remove shield strip (307) (page 16).
⑤ Disconnect sensor leads (page 16).
⑥ Loosen hex socket head setscrews (301) and extract
the preamplifier upward.
⑦ Remove C-shaped stop ring (209) for the shaft (Fig.
11.2).
⑧ Remove O-ring retainer (208) and O-ring (207).
⑨ Take off hex socket head bolts (206) and Remove
adaptor (204) (Fig. 11.3).
(Take off four hex socket head bolts (206).)
⑩ Take off hex socket head bolts (203).
NOTE: Loosen bolts in an alternating order to ensure
even loosening. Ensure also that no internal pressure
exists.
⑪ Remove the sensor (202) from the meter body (101)
(Fig. 11.4).
11.1.2 Fixed Sensor Installation
Reverse the order of disassembly for assembly,
observing the following instructions：
① Do not drop or force the sensor, or it may be
damaged.
② When you install the sensor, make sure that gasket
(201) is in place (see Fig. 11.4).
③ With sensor's locating pin in alignment with meter
body's pin slot, carefully install the sensor into
position.
④ While installing the sensor with hex socket head
bolts (203), ensure even bolt tightening.
NOTE: Good practice is to tighten bolts in increments
of 30 degrees at a time.
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