KYORITSU 6016 - Manual (Page 5)

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11 Do not operate the function selector while 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.
12 Do not rotate rotary switch 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.
13 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
14 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.