Sofraser MIVI - Maintenance; Periodic Maintenance

MIVI Technical Manual
REF: 379/4 19
4. Maintenance
4.1 Periodic maintenance
MIVI sensor has no moving parts and can be operated without maintenance in some specific con-
ditions.
Nevertheless, SOFRASER advises to check the MIVI sensor once a year.
Each end user can reduce or increase this period of time according to his policy and specific oper-
ation conditions.
The check can be done by end user, SOFRASER distributor or SOFRASER after sales workshop.
SOFRASER advises to proceed to hereunder check:
Check Expected Action in case of not expected
status
Visual inspection of cable No damages, no cut, no twist,
…
Stop the viscometer, especially if
used in Ex area, and send the unit
back to SOFRASER for mainte-
nance of the cable
Visual inspection of the
cable gland
No damages, no broken
parts, no dismounted parts,
not loose, the cable is se-
curely held by the cable
gland, …
Stop the viscometer, especially if
used in Ex area, and send the unit
back to SOFRASER for mainte-
nance of the cable gland
Visual inspection of flexi-
ble tube
No damages, no crack, no
cut, no crushed turns, bend-
ing radius according to in-
structions
Stop the viscometer, especially if
used in Ex area, and send the unit
back to SOFRASER for mainte-
nance of the flexible tube
Visual inspection of the
junction between sensor
body and flexible tube
No backlash on the assembly
of flexible on MIVI sensor
body. Presence of the block-
ing piece on ATEX sensor
Stop the viscometer, especially if
used in Ex area, and send the unit
back to SOFRASER for mainte-
nance
Visual inspection of the
marking plate
Presence of the marking
plate, readable serial num-
ber, Ex classification, maxi-
mum operating conditions
and consistency with pro-
cess conditions and
SOFRASER electronics serial
number
Refer to delivery note and specific
notes if information aren’t readable.
Investigate why MIVI sensor is used
with electronics that hasn’t the
same serial number. Unless there is
an explained reason found the elec-
tronics that has been matched with
sensor by SOFRASER
Remove the MIVI from its mounting accessory. Take care and warrant the absence of pressure,
hazardous chemicals, excessive temperature…, before releasing the mounting screws. Check
that MIVI has been installed with its flow damper. If not and in case of doubt take much care