2.2 - Product specific safety recommendations
M2007/3en
TCT-2301 Safety recommendations
15
©BTG 2004
•
Install the probe into the valve assembly. Fit the two screws locking
the probe in place. Check that these screws are properly tightened, as
well as the four screws holding the valve together. See section 3.2.5:
Mounting the probe in the valve assembly
for details.
•
When the probe has been installed, carry out test pressurization using
water in the pipeline. The correct test pressure depends on standards
and regulations in each country. In some lines for which inspection
is required, a pressure test must be carried out before the product can
be commissioned.
2.2.5
Installing the electronics box
A hazardous voltage is used to drive the electronics box. The electronics
box may only be connected by a qualified electrician in accordance with
instructions. The earth ground should be connected correctly and
checked.
It should be possible to switch off the voltage in the distribution centre,
for example. A clear warning, such as a sign, should let other people
know that work is in progress and the switch must not be touched.
•
Use only metallic cable fittings with shield connection for the
electronics box.
2.2.6
Starting up and servicing the transmitter
Read through the following points before starting up and servicing the
transmitter. Bear also in mind that the points mentioned above contain
important information for these operations.
•
Before removing the probe from the valve assembly, check carefully
that the valve is closed.
Hot or corrosive liquid flowing out under
pressure may cause serious chemical burn injuries!
•
Take care when opening the cover of the electronics box with built-
in power supply unit.
It contains live parts that may cause electric
shocks.
Live parts are protected against normal contact provided that
connections are made correctly.
•
When the probe is exposed to dangerous basic or acidic corrosive
media, it should be removed from the pipeline regularly for
inspection. Replace any damaged seals. If the probe’s pressurized
parts have corroded, check that the material is correct for the
application.
Leakage may cause personal injury or damage to
equipment due to corrosion or burning!
Check that the screws/nut
holding the valve/probe
together are mounted and
properly tightened.
DANGER!
High voltage inside the
electronics box.
Connections may only be
carried out by qualified
personnel.
To prevent electrical shock
— connect the protective
earth
PE properly.