Handling instructions
for GISMA connectors
HI
– 2007 - 001
Document: replaces
MV 2000-020,
MV 2000-030 and
MV 2005 - 011
First issue:
15.07.2008
Rev.-Index: -Z-
From:
29.07.2020
Copyright by:
GISMA GmbH
Page 24 of 44
7.4.2. Live Mate / Demate
The series 34 range of connectors are designed to be mated / de-mated with
POWER OFF
.
7.4.3. Protection of rece
ptacle’s pin contacts
Under no circumstances the contacts should be exposed to seawater with power on. If this
situation does occur the contact surfaces of the contacts will very rapidly degrade by electrolytic
action. If these damaged pins are subsequently mated into a socket insert there is a
very high
risk
of damage to the insulation and seals within the plug.
7.4.4. Removal of Marine Growth and Calcareous Deposits
To remove calcite growth topside or subsea from GISMA connectors, a solution of 50% Citric Acid
is recommended. All seawater exposed elastomeric materials in GISMA connectors have been
fully tested against 50% Citric Acid and are compatible for duration of 1 hour. In addition, the
thermoplastic materials have good resistance to Citric Acid.
Other acid cleaners, such as >50% Acetic Acid, should
not be
used as they may cause
deterioration of the elastomeric materials.
Chiselling and abrasive methods are not recommended. Use of a water jet is not acceptable.
NOTE:
Keep the connector mated at any cleaning operation!
7.4.5. Connector Handling
The mounting hole and the supporting surface must be clean and without any damages.
Pre Mating Check
The connector that is to be joined must be free of dirt and foreign matter. Coaxial- and fibre-
optic inserts must be protected against moisture.
Attention
For hybrid connectors (eg fibre optic and coax combined) it is necessary to ensure that only
the region of the O-ring must be greased. Fibre-optic and coaxial contacts must be kept
absolutely free from grease to prevent losses.
Dirty connectors to be purged with GISMA foam cleaner (SCHAUMREINIGER). Allow three
minutes to react. In case of strong dirt repeat the procedure. Then rinse with clean water.
Following rinse with the enclosed cleaning liquid (SPÜLLÖSUNG) to neutralize foam cleaner.
O-ring greasing
We recommend our grease EK2 which is well tested and for all our elastomers approved.
Typical properties
reduced friction and wear