2
3
Caution
Before using your KTD40 please read these instructions; in particular note the safety
issues that follow:
•
Although fully protected up to 440V AC this tester is for use on 230V AC circuits
only.
•
Always check the tester on a known, correctly wired, live socket outlet before and
after use.
•
Before use check your tester for any damage to the plug, lead and cabinet.
Important calibration/check box note
•
Because of the Super Smart Loop Test System the test is immune to sudden value
changes (such as voltage spikes).
•
As a result when changing calibration or check box loop values the unit must be
switched off between changes.
BS EN 61010-1
At Kewtech our engineers constantly look for improvement. If there is any aspect of
your Kewtech tester you would like to comment on please visit our website at
Kewtechcorp.com
Operation Overview
Your Kewtech tester has a special polarity test function.
It is a little known fact that a system can be reverse wired with Line (Phase) to earth/
neutral and earth/neutral to Line (Phase). The sockets will all work and conventional loop
testers will show and test that everything is correct despite this very dangerous wiring
condition.
Although extremely rare, this miswire condition can exist so if your test shows this fault
do not proceed – if in any doubt advise your customer to contact their supply company
immediately. (See test step
3, page 9)
CORRECT POLARITY
Correct polarity
3
Operation overview
Your Socket & See tester has a special polarity test function.
It is a little known fact that a system can be reverse wired with Live (Phase) to
earth/neutral and earth/neutral to Live (Phase) The sockets will all work and
conventional loop testers will show and test that everything is correct despite
this very dangerous wiring condition.
Although extremely rare, this miswire condition can exist so if your test shows
this fault do not proceed – if in any doubt advise your customer to contact their
supply company immediately. (See test step 3, page 9)
FUSE 100A
From supply
company
LIVE (Phase)
NEUTRAL
Typical supply service
cut-out fuse
Live (Phase)
to meter
Neutral to meter
To main earthing
terminal
Solid brass
connecting block
FUSE 100A
From supply
company
NEUTRAL
LIVE (Phase)
Typical supply service
cut-out fuse
Neutral to meter
Live (Phase)
to meter
To main earthing
terminal
Solid brass
connecting block
REVERSE POLARIT Y
REVERSE POLARITY
LINE (Phase)
LINE (Phase)
NEUTRAL
NEUTRAL
LINE (Phase)
to meter
LINE (Phase)
to meter
To main earthing
terminal
Neutral to meter
To main earthing
terminal
The Kewtech KTD40 Loop Impedence Tester is designed for use by suitably
qualified personnel familiar with electrical supply systems.
