Fluke 1503 FE 1503-1507 Users Manual - Page 19

Measuring Volts, Measuring Earth-Bond Resistance, Measuring Volts

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Measuring Volts 1507 INSULATION TESTER Figure 5. Measuring Volts bbw09f.eps Insulation Testers Making Measurements Measuring Earth-Bond Resistance Resistance tests should only be performed on de-energized circuits. Check the fuse before testing. See Testing the Fuse later in this manual. Connecting to an energized circuit while the test is active will blow the fuse. Note Measurements can be adversely affected by impedances of additional operating circuits connected in parallel or by transient currents. To measure resistance: 1. Insert test probes in the Ω and COM input terminals. 2. Turn the rotary switch to the O position. 3. Short the ends of the probes together, press the blue button and wait until dashes appear on the display. The Tester measures the probe resistance, stores the reading in memory, and subtracts it from readings. The probe resistance reading is saved even when the Tester is turned off. If the probe resistance is >2 Ω, the resistance will not be saved. 4. Connect the probes to the circuit to be measured. The Tester automatically detects if the circuit is energized. 11

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Insulation Testers
Making Measurements
11
Measuring Volts
INSULATION
TESTER
1507
bbw09f.eps
Figure 5. Measuring Volts
Measuring Earth-Bond Resistance
Resistance tests should only be performed on
de-energized circuits. Check the fuse before testing. See
Testing the Fuse later in this manual. Connecting to an
energized circuit while the test is active will blow the fuse.
Note
Measurements can be adversely affected by
impedances of additional operating circuits
connected in parallel or by transient currents.
To measure resistance:
1.
Insert test probes in the
Ω
and
COM
input terminals.
2.
Turn the rotary switch to the
O
position.
3.
Short the ends of the probes together, press the blue
button and wait until dashes appear on the display.
The Tester measures the probe resistance, stores the
reading in memory, and subtracts it from readings.
The probe resistance reading is saved even when the
Tester is turned off. If the probe resistance is >2
Ω
,
the resistance will not be saved.
4.
Connect the probes to the circuit to be measured. The
Tester automatically detects if the circuit is energized.