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Audible tones
A simple selection of audible tones is used to supplement the visual display. These help the
user by providing intuitive feedback during testing. In addition to warning about dangerous
or unstable supply conditions they provide a very quick confirmation that the measurement
process is taking place and, upon completion of the test, a warning if the results are likely to
be regarded as a failure.
The meaning of the tone for each individual function is covered in detail in the relevant
section. Generally however there are five types of tone emitted.
Danger
A rising siren type alarm
In the event of a potentially dangerous situation such as
connecting to a live supply when configured for insulation
testing. Will be accompanied by the Red Voltage/Polarity
warning LED flashing.
Warning
A continuous 2 tone alarm
An unsuitable supply configuration such as a mains supply
with incorrect polarity or having the leads connected
wrongly will be accompanied by the Red Voltage/Polarity
warning LED flashing
.
Wait-Test in progress
A steady beeping sound
Emitted whilst a measurement is in progress. The same
tone is sounded when used in Handsfree mode to indicate
that continual measurement is being made
Test completed
A single beep
Sounded upon completion of a measurement to indicate
that the result is being displayed
Alert
A short 2 tone alarm
Sounded when a test returns a result that is likely to be
regarded as a failure e.g. An insulation test that gives a
result of less than 2 MΩ
