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Electrical Installation Tester
Measurements
31
2. 1664 FC: Choose the test lead pair to use with and use the appropriate
terminals for this test. You can also use the mains test cord.
1662/1663: Use the L and PE (red and green) terminals for this test.
3. Use to select the test voltage. Most insulation tests are done at 500 V,
but always observe any local test requirements.
4. 1664 FC: Activate Safety Pretest with .
WCaution
Safety Pretest works reliably only when you have connected the
L terminal to the phase, the N terminal to the neutral line, and the
PE terminal to the PE line.
5. Press and hold
until the reading settles and the Tester beeps:
• The primary display shows the insulation resistance.
• The secondary display shows the actual test voltage.
Tests are inhibited if voltage is detected in the line.
Note
For normal insulation with high resistance, the output voltage
(U
A
) should always be equal to or higher than the programmed
voltage. If not, check the Tester connections, leads, and fuses.
If insulation resistance is low, the test voltage is automatically
reduced to limit the test current to a safe level.
1.888.610.7664 sales@GlobalTestSupply.com
Fluke-Direct.com
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