36
OPTIMASS
5
SERVICE AND MAINTENANCE
5.1 Maintenance
The OPTIMASS / OPTIGAS 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.
5.2 Replacement of mains fuse
Open the window cover. Press the two metal clips on each side of the display and pull the dis-
play unit forward. Move the display-unit sideward, out of the way. Loosen the two crosshead
screws holding the electronic unit is place. Slide the electronic unit forward, with care. When
the unit is almost completely removed from the housing, disconnect the long rectangular (10-
pole) blue connector at the back-end of the unit. This connector is for the flow sensor circuits.
Remove the unit from the housing.
The mains fuse is situated in a fuse holder at the back-end of the electronic unit. The specifica-
tion must be as follows:
5.3 Returning the device for service or repair
This device has been carefully manufactured and tested. If installed and operated in accor-
dance with these operating instructions, it will rarely present any problems. Should you 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 cer-
tificate 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 prod-
uct used.
We cannot service your device unless accompanied by a certificate.
The specimen shown in appendix 1 can be photocoppied and used and it is also 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
Fuse type: 5 x 20 mm (H) according to IEC 60127-2/V
PPoowweerr SSuuppppllyy:: TTiimmee LLaagg:: KKRROOHHNNEE PPaarrtt NNuummbbeerr::
12-24 VDC 250V / 2A 5060200000
24 VAC/DC 250V / 2A 5060200000
100-230 VAC 250V / 0.8A 5080850000
AD OPTIMASS 300_010 Haz Areas Rev 01.qxp 05/03/2014 13:25 Page 36
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