Hazardous area supplement to the QuickStart
OPTIFLUX
14
5.
Service and maintenance
5.1
Maintenance
The OPTIFLUX flowmeters are maintenance free with respect to the flowmetering properties. Within the scope of periodic
inspections required for electrical equipment installed in hazardous areas it is recommended to check the flameproof
converter housing and covers for signs of damage or corrosion.
For flowmeters sizes DN 25-100 with an EEx d flow sensor housing, this housing should also be inspected.
5.2
Replacement of
mains fuse
•
After opening the window cover, pull the display-unit forward using the two metal levers left and right.
Slip the display-unit sideward. Loosen the two crosshead screws with which the electronic unit is
fixed. Now carefully slide the electronic unit forward. When the unit is almost completely removed
from the housing, disconnect the long rectangular (14-pole) blue connector at the back-end of the
unit. This connector is for the electrode- and coil circuits. Now the unit can be completely removed
from the housing.
•
The mains fuse is situated in a fuse holder at the back-end of the electronic unit. Replacement types
must have a high breaking capacity to IEC 60 127. The rated nominal values must be
≤
1.6 A for the
100..230 V AC version and
≤
2.0 A for the 12..24 V DC version. Consult the Handbook for the correct
nominal value.
5.3
Returning the
device for service
or repair
This device has been carefully manufactured and tested. If installed and operated in accordance with these operating
instructions, it will rarely present any problems. Should you nevertheless need to return a device for inspection or repair,
please pay strict attention to the following points:
•
Due to statutory regulations on environmental protection and safeguarding the health and safety of our personnel,
KROHNE may only handle, test and repair returned devices that have been in contact with products without risk to
personnel and environment.
•
This means that KROHNE can only service this device if it is accompanied by the following certificate confirming that
the device is safe to handle.
If the device has been operated with toxic, caustic, flammable or water polluting liquids, you are kindly requested:
•
To check and ensure, if necessary by rinsing or neutralizing, that all cavities in the device are free from dangerous
substances.
•
To enclose a certificate with the device confirming that it is safe to handle and stating the product used.
•
We cannot service your device unless accompanied by such a certificate.
The following specimen statement is available on the KROHNE website as a word file. Simply download and use the
tabulator key to go from one fill-out field to the next. Please attach the form to the returned device.
Specimen statement
Company:
Department:
Address:
Name:
Tel. No.
The enclosed device:
Type:
KROHNE Order No.
Has been operated with the following liquid:
Because the liquid is:
water-pollutant
toxic
caustic
flammable (tick where applicable)
We have checked that the flowmeter and all cavities in the flowmeter are
free from such substances
flushed* out and
neutralized.
* delete where not applicable
We hereby confirm that there is no risk to man or environment through any residual liquid in or on the flowmeter or in any
of its cavities.
Date:
Signature:
Company Stamp:
