1
Introduction
The Fluke Models 1503, 1507 and 1508 are battery-powered insulation testers (hereafter,
Tester or UUT). These Testers meet CAT IV IEC 61010 standards. The IEC 61010
standard defines four measurement categories (CAT I to IV) based on the magnitude of
danger from transient impulses. CAT IV Testers are designed to protect against transients
from the primary supply level (overhead or underground utility service).
Although this manual contains calibration information for Models 1503, 1507, and 1508,
all illustrations and examples assume use of Model 1507. Table 1 provides a description
of all the symbols used in this manual.
The information provided in this manual includes the following:
• Warnings and Safety Information
• Performance Test Procedures
• Calibration Adjustment Procedure
• Battery Replacement Procedure
• Replaceable Parts and Accessories
• Specifications
The information provided in this manual should only be used by qualified personnel. For
complete operating instructions and additional safety information, refer to the 1507/1503
Insulation Testers Users Manual or the 1508 Insulation Tester Users Manual.
Safety Information
XWWarning
To avoid possible electric shock or personal injury, follow these
guidelines:
• Use the Meter only as specified in this manual or the protection
provided by the Tester might be impaired.
• Do not use the Meter or test leads if they appear damaged, or if the
Meter is not operating properly. If in doubt, have the Meter serviced.
• Always use the proper terminal, switch position, and range for
measurements before connecting Meter to circuit under test.
• Verify the Meter’s operation by measuring a known voltage.
• Do not apply more than the rated voltage as marked on the Meter,
between the terminals or between any terminal and earth ground.
• Use caution with voltages above 30 V ac rms, 42 V ac peak, or 60 V dc.
These voltages pose a shock hazard.
• Replace the battery as soon as the low battery indicator (b) appears.
• Disconnect circuit power and discharge all high-voltage capacitors
before testing resistance, continuity, diodes, or capacitance.
• Do not use the Meter around explosive gas or vapor.
• When using the test leads, keep your fingers behind the finger guards.
• Remove test leads from the Meter before opening the Meter case or
battery door. Never operate the Meter with the cover removed or the
battery door open.
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