Protection Of Receptacle's Pin Contacts; Removal Of Marine Growth And Calcareous Deposits; Connector Handling - GISMA 10 Series Handling Instructions Manual

First issue: 15.07.2008
Rev.-Index: -Z-
From: 29.07.2020

7.3.3. Protection of receptacle's pin contacts

Under no circumstances the contacts should be exposed to seawater with power off or 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.

7.3.4. 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 acceptable, but the
jet should not be directed onto the pins at the front and onto any elastomer part like insulators
and bootseals.
NOTE: Keep the connector mated at any cleaning operation!

7.3.5. Connector Handling


Installation instruction for jam nut receptacles, bulkheads and pressure hull penetrators
The flange and mounting hole has to be manufactures according VG 85 519 or customer
design.
The mounting hole and the supporting surface must be clean and without any damages.
Grease the mounting hole and the supporting surface with corrosion preventing fluid (for
example Fluid Film).
Push the pressure hull penetrator into mounting hole and locate the penetrator with the
centering pin according to your installation drawing. The connector keyway must be in the
right position.
For easy handling we recommend the GISMA pipe spanners: 22.94.001 / 22.94.002 and
22.94.003. If castellated nuts are used, the Mounting tool 22.94.020, 22.94.021 or 22.94.022
is necessary.

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.
Prior to mating an series 22 connector, each conical seal of the socket insert should be filled
with a small amount of GISMA grease EK2 (part no.: GISMA-FETT EK-2) dielectric grease.

Installation conditions for 90° PUR moulding endbells
Plugs with 90° PUR moulding endbells have to be mounted without bending forces at the
PUR moulding.
Handling instructions
for GISMA connectors
HI – 2007 - 001
Page 17 of 44
Document: replaces
MV 2000-020,
MV 2000-030 and
MV 2005 - 011
Copyright by:
GISMA GmbH