6.1
Maintenance
Rosemount 396R and 396RVP sensors are disposable type sensors and require minimum
maintenance. These sensors should be removed from the process periodically and checked in buffer
solutions. If the sensor will not calibrate, refer to your transmitter instruction manual for proper
test procedures. If the sensor has failed, it should be discarded and replaced.
6.2
Sensor Removal
Please refer to the appropriate paragraph for instructions regarding removal of the sensor for
periodic maintenance.
6.2.1
Retractable Version
A.
Rosemount 396R-21 (21 in. tube)
1.
Be certain system pressure at the sensor is below 64 psig (542 kPa) before
proceeding with the retraction. It is also recommended that the personnel wear
a face shield and have a stable footing. Refer to Figure 6-1. Push in on the sensor
end or the top of the J-box and slowly loosen the hex nut (B) of the process end
male connector (A).
B.
Rosemount 396R-25 (36 in. tube)
2.
Be certain that pressure at the sensor is below 35 psig (343 KPa) before proceeding
with the retraction. It is also recommended that the personnel wear a face shield
and have a stable footing. Refer to Figure 6-1. Push in on the sensor end or the top
of the J-box and slowly loosen the hex nut (B) of the process end male
connector (A).
3.
When the hex nut is loose enough, slowly ease the sensor back completely until
the retraction stop collar is reached.
4.
Close the ball valve slowly. If there is resistance, the valve may be hitting the
sensor. Double check that the sensor has been retracted to the retraction stop
collar.
Maintenance
45
Section 6: Maintenance
Do not remove nut at this time.
CAUTION
Instruction Manual
Maintenance
LIQ-MAN-396R-396RVP
March 2017
WARNING
System pressure may cause the sensor to blow out with great force unless care is taken during removal.
Make sure the following steps are adhered to.
Failure to withdraw the sensor completely may result in damage to the sensor when the valve is closed.
CAUTION
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Страница 32: ...Wiring Rosemount 396R Instruction Manual March 2017 LIQ MAN 396R 396RVP 26 Wiring Rosemount 396R ...
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