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Idiomas disponibles
Idiomas disponibles
Digital Insulation Tester/English
Lock Function
For hands-free operation, use the LOCK feature.
1. With the test leads connected to the equipment under test,
simultaneously press the TEST and LOCK keys.
2. The LOCK icon"
" will appear on the display. A beeper will
sound every 2 seconds to indicate that the meter is in Lock mode.
3. Press the LOCK key to disable the Lock function and end the test.
TEST : In the insulation resistance testing function, press and hold the
"TEST" button to apply the high-voltage, and enter into the
insulation resistance testing mode; release the "TEST" button to
cutoff the high-voltage and exit from the insulation resistance
testing mode.
Backlight
Press the
key for to turn on the display backlight function. The
backlight will automatically turn off after 15 seconds.
3. INSULATION RESISTANCE MEASUREMENTS
a). Measurements at 200MΩ/250V
This is the voltage used for the majority of insulation resistance tests on
normal installation requirement. To measure insulation resistance, press
the test button to power on the tester. The LCD will display the
insulation resistance. Subdivision of large installations might be
necessary because of the large number of parallel insulation resistance.
In such a case, an installation may be divided into sections, each
being separately tested. Each section must have not less than fifty
outlets, an outlet being a switch, socket, lighting point etc. A switched
socket counts as one outlet. For a large installation, the capacitance of
the insulation will be high, and it will take longer for it to become
charged by the direct testing voltage. Care must be taken not to take a
reading until there is a steady reading, indicating that the charging
process is complete.
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Note:
The charge stored in the insulation will be discharged
automatically when the test button is released. Be careful not to turn
the range switch knob whilst the test button is pressed, or the
instrument will be damaged.
b). Measurements at 2000MΩ/1000V
Some specifications require testing at 1000V. This voltage must also be
selected where the supply voltage of the installation is between 500V
and 1000V. First, set the range switch to 1000V and then proceed as
indicated for 500V testing. The above note also applies to testing at
1000V. In addition the following applies.
Note:
Make sure that the circuit under does not include
components which will be damaged by the 1000V applied. Many
normal components of an installation are likely to be damaged if tested
at 1000V. Examples are power factor correction capacitors, low voltage
mineral insulated cables, electronic light dimmers, electronic ballasts
and starters for fluorescent lamps etc...
c). Lock power on Feature
For hands free operation a lock power on feature is incorporated on the
press to test button. Set LOCK button to lock test voltage, pressing it
again will shut off the high-voltage and exit from the insulation
resistance testing status.
4. LOW RESISTANCE (CONTINUITY) MEASUREMENTS
a). Set the range switch to 200 ·))) Position
b). Connect the red test lead to the V
terminal.
c). Connect the tips of the test leads to each ends of the circuit under
test. Read resistance in
on the LCD.
d). When the impedance on circuit is below approximately 40 a
continuous tone will sound.
Digital Insulation Tester/English
terminal and black to the COM
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