Live Circuit Warning
When more than 25V is applied to the terminals in the insulation
ranges, the instrument defaults to a voltmeter will give an
audible warning if a test is attempted. On all other switch
positions except OFF/v/mV when more than 10V is applied the
default voltmeter will be activated. Testing will be inhibited.
Voltage Testing on High Energy Systems
Use extreme care when using or measuring voltages above
30V, particularly in high energy systems. Fused test leads are
available as optional accessories for local situations where
increased protection is required.
Auto-shut Off
To conserve battery life, Auto-shut Off (preceded by a series of
bleeps) operates after approx. 10 minutes of instrument
inactivity on the insulation ranges, 5 minutes on all other ranges.
If the instrument is switched on whilst holding the
key,
the Auto shut-off time is extended to 60 minutes. To restore
operation after Auto-shut Off, either select OFF followed by the
required switch position.
Note: It is recommended that the instrument is switched to the
OFF position when not in use.
Backlight
The backlight is activated by pressing the
key. The
backlight will remain illuminated for approximately one minute
before automatically switching off to conserve battery life,
alternatively the
key can be re-pressed.
Insulation Tests (MΩ) (See fig.1)
The insulation tests apply a known voltage to the circuit under
test and measure the resulting leakage current. The circuit
under test must be completely de-energised and isolated
before test connections are made.
Insulation tests are only initiated when the TEST button is pressed.
1. Set the range switch to the test voltage required.
2. Connect the test leads, first to the instrument, and then to
the isolated item under test.
3. Press the TEST button to activate the test voltage. Take
the reading.
4. Release the TEST button at the end of the test. The last
reading will hold on the display.
5. Any capacitive circuits charged during a test will automatically
discharge. If significant voltage remains the voltage warning
will occur and the voltage present displayed.
6. Remove the test leads only when no voltage is indicated.
Locking Test Button (ltb)
When it is desired to do a long insulation test, the test can be
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