Service Manual
I4X/EN CO/D
ISTAT I4X
Page 6
3.
EQUIPMENT OPERATING CONDITIONS
The equipment should be operated within the specified electrical and environmental limits.
3.1
Current transformer circuits
Do not open the secondary circuit of a live CT since the high level voltage produced may be
lethal to personnel and could damage insulation.
3.2
External resistors
Where external resistors are fitted to relays, these may present a risk of electric shock or
burns, if touched.
3.3
Battery Replacement
Where internal batteries are fitted they should be replaced with the recommended type and
be installed with the correct polarity, to avoid possible damage to the equipment.
3.4
Insulation and dielectric strength testing
Insulation testing may leave capacitors charged up to a hazardous voltage. At the end of
each part of the test, the voltage should be gradually reduced to zero, to discharge
capacitors, before the test leads are disconnected.
3.5
Insertion of modules and pcb cards
These must not be inserted into or withdrawn from equipment whist it is energised since this
may result in damage.
3.6
Fibre optic communication
Where fibre optic communication devices are fitted, these should not be viewed directly.
Optical power meters should be used to determine the operation or signal level of the
device.
