26
The test button can be locked down for ease of use by pressing it and
turning clockwise. Do not forget to release test button by turning it anti-
clockwise before disconnecting the instrument from the test points.
Failure to do so may leave the tested circuit in a charged condition when
carrying out insulation tests.
The instrument is provided with a sliding cover to ensure that leads for
testing continuity and insulation resistance cannot be connected at the
same time as test leads for loop testing and RCD testing. If this sliding
cover is damaged so that it fails to perform its function, do not use the
instrument and return it to Kewtech for attention.
When the display shows the low battery indication, , disconnect the
test leads from the instrument. Remove the battery cover and the
batteries. Replace with eight (8) new 1.5V AA batteries, taking care to
observe correct polarity. Replace the battery cover.
The continuity test circuit is protected by a 600V 0.5A HRC ceramic type
fuse situated in the battery compartment, together with a spare. If the
instrument fails to operate in the continuity test mode, first disconnect the
test leads from the instrument. Next remove the battery cover, take out
the fuse and test its continuity with another continuity tester. If it has failed,
replace it with a spare, before refitting the battery cover. Do not forget to
obtain a new fuse and place it in the spare position.
If the instrument will not operate in the loop impedance, PSC and RCD
modes, it may be that the
protective fuses fitted on the
printed circuit board have
blown. If you suspect that
the fuses have failed, return
the instrument to Kewtech
for service - do not attempt
to replace the fuses yourself.
9 General
10 Battery
replacement
11 Fuse
replacement
+
_
LO
Fig 11
Spare fuse
Screw
Fuse
Battery
