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a phase marked as "L1" elsewhere in the fixed installation may
not be same phase as one marked as "L1" in the location being
tested. That must be verified by separate tests to confirm absence
of phase offset.
3.8 Wiring Colour Coding
In April 2004 the colour coding of UK wiring was harmonised with
the IEC wiring colour code. Table 2 shows the old UK colour code
and the new IEC colour code.
Table 2
Earth
Old UK
Green
Colours
Yellow
Green
New IEC
Yellow
Colours
4. MAINTENANCE
4.1 Battery Replacement
To avoid shock or injury, disconnect the PSI4000 / PSI4300
sensor clips from any external circuits before proceeding.
The battery compartment is underneath the unit and can be accessed
by undoing the screw securing the battery cover, and lifting it off.
Observing correct polarity, fit 4 new 1.5V LR6/AA alkaline batteries.
Replace the battery cover and screw.
Note: Do not mix old and new batteries.
Neutral
Black
Blue
Battery
Line 1
Line 2
Red
Yellow
Brown
Black
Screw
Line 3
Blue
Grey
8
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