2
Safety Aspects
2.1
Safety
q
The
Baby Dopplex
and its transducers are designed to high standards of
performance, reliability and safety.
q
Functional and safety checks should always be made after carrying out any
repairs or dismantling the equipment.
It is recommended that regular inspections are to be made to check the integrity of the
unit, and to ensure cables are not showing any signs of wear or noise when flexed.
2.2
Safety Testing
Using suitable safety test equipment, refer to the following guidelines.
Earth Bonding Test points
a) Test the exposed chassis, accessible through the moulding apertures on the
underside of the unit.
b) Test the metal shroud of the toco socket.
c) Test the shells of the rear panel D-type connectors.
The maximum allowable reading at all points is 0.1
W
.
Earth Leakage Test
Set the on/off switch on the rear of the unit to the on position.
The maximum allowable leakage current is 100
m
A.
Breakdown Test
Set the on/off switch on the rear of the unit to the “on” position.
Apply 1500Vac to the mains connector, connecting the low voltage probe to the
“EARTH” terminal. Firstly test the “LIVE” terminal and then the “NEUTRAL” for 60
seconds each. The maximum allowable reading is 1mA.
Issue: 2 DRAFT
3
Rev: a
614365
