Testing Procedures; Insulation Resistance Testing (R); Test Current Measurement (I); Fault Conditioning (Burn) - Megger S1-5001 Guia Del Usuario

Operation

Testing Procedures

Insulation Resistance Testing (R)

This test mode measures insulation resistance continuously at the
selected voltage.The highest digital readings obtainable are
500 GΩ at 500 V and 5 TΩ at 5000 V, above which the specified
accuracy can be expected to decline. However, the analogue
indicator display functions to 1TΩ at all voltages.
1. Using the Range keys move the right hand cursor to 'R'.
2. Using the Selector keys move the left hand cursor to the
timer position. Accept the default time of 30 minutes, or using
the Selector keys move the left hand cursor to the
position and then set the test duration using the
keys. Setting zero time effectively inhibits any testing.
Maximum test time is 90 minutes.
3. Using the Selector keys move the left hand cursor to the
required test voltage.
4. Start the test by pressing the red test button for at least one
second.
5. On completion, the final resistance measurement is
displayed sequentially with the corresponding leakage
current and the capacitance value, where available. This
sequential display repeats until a key is pressed or Auto
switch-off operates.
Note: A capacitance value reading is only available if the test
has run for more than one minute, and provided the reading was
not over-range.
10

Test Current measurement (I)

This test mode measures insulation continuously at the selected
voltage, but displays leakage current value instead of resistance.
This enables even higher resistances to be calculated. Using this
method it is theoretically possible to measure resistance up to
500 TΩ at 5000 V but it will be necessary to perform an open
circuit calibration test to establish measurement circuit offset
current and test lead leakage. (This is ±0,2 nA at normal
temperatures with new, clean test leads).
1. Using the
and follow the same procedure as for Insulation Test 'R'.
2. On completion, the final current leakage measurement is
Range
displayed sequentially with the resistance and the
capacitance value, where available. This sequential display
repeats until a key is pressed or Auto switch-off

Fault Conditioning (BURN)

Burn mode disables the 'Breakdown' detector and warning
indicator and therefore allows continuous testing under
breakdown conditions with a 5 mA (nominal) current.
1. Using the
'BURN'.
2. Using the
required test voltage.
3. Start the test by pressing the red test button for at least one
second.
4. If complete breakdown does not occur the final measured
Range keys move the right hand cursor to 'I',
Range keys move the right hand cursor to
Selector keys move the left hand cursor to the