Fluke 1503 Insulation Tester
The Fluke 1503 is a handheld measuring instrument used to check if the insulation in cables, motors, installations, and other electrical equipment still maintains the desired resistance. When performing troubleshooting, commissioning, or preventive maintenance, these types of measurements are precisely what you use to find weakened insulation before it causes problems.
The instrument measures insulation resistance in the range from 0.01 MΩ to 2000 MΩ and operates with two DC test voltages: 500 V and 1000 V. This makes it suitable for testing components and installations where a proper insulation test is required, and not just a standard resistance measurement.
In addition, it can measure AC/DC voltage from 0.1 V to 600 V and has earth bond continuity testing at 200 mA. This means it can also be used to check for continuity in conductors and protective earth, without needing another instrument first.
An important safety feature is that the instrument detects voltage on the circuit and blocks the insulation test if there is more than 30 V on the terminals. This is relevant in practice because it prevents testing on a circuit that is still live. At the same time, it is classified CAT IV 600 V, making it suitable for work in demanding measurement environments.
The Fluke 1503 is well-suited for electricians and technicians who need a simple insulation tester with the most commonly used functions combined in one instrument. It is particularly relevant when the task involves checking insulation, voltage, and earth continuity with a single handheld tool.
You can read more here:
See datasheet from the manufacturer
Specifications
- Insulation resistance: 0.01 MΩ to 2000 MΩ
- DC test voltages: 500 V and 1000 V
- AC/DC voltage measurement: 0.1 V to 600 V
- Earth bond continuity test: 200 mA
- Live-circuit detection: blocks insulation test at terminal voltage above 30 V
- Category: CAT IV 600 V
- Power supply: 4 x AA batteries
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