Kewtech KT62 Instruction Manual page 4

Safe testing 11 During testing it is possible that there may be a momentary
degradation of the reading due to the presence of excessive transients
or discharges on the electrical system under test. Should this be
observed, the test must be repeated to obtain a correct reading. If in
doubt, contact Kewtech.
12 The sliding shutter on the back of the instrument is a safety device. The
instrument should not be used if it is damaged or impaired in any way,
but returned to Kewtech for attention.
13 Kewtech recommends the use of fused test leads particularly when
measuring voltages in high energy circuits. Where assessments show
that the risk is significant, then the use of fuse test leads constructed in
accordance with the HSE Guidance Note GS38 should be used. The
test accessories used with this instrument for loop impedance and
RCD tests are all fused.
14 Do not operate the function selector whilst the instrument is
connected to a circuit. If, for example, the instrument has just
completed a continuity test and an insulation test is to follow,
disconnect the test leads from the circuit before moving the selector
switch.
15 Do not rotate function dial when test button is depressed. If the
function switch is inadvertently moved to a new function when the test
button is depressed or in lock-down position the test in progress will
be halted.
16 Always check the test lead resistance before carrying out tests. This
ensures the leads are ok before taking measurements. The resistance
of leads and/or crocodile clips may be significant when measuring low
resistances. If crocodile clips can be avoided for low resistance
measurements , this will reduce the error due to lead accessories
17 When carrying out Insulation Resistance tests, always release the test
button and wait for charged capacitances to totally discharge before
removing the test leads from the test circuit.
BATTERY LIFE
Always switch the selector dial to the OFF position after each testing
period. This will conserve battery power.
INSULATION/CONTINUITY TESTS
Only use the test leads supplied with this tester and always ensure that
they are plugged fully into the unit's 4mm terminals to guarantee a
sound and proper connection.
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