1. Introduction
The Fluke T150 is a robust two-pole voltage and continuity electrical tester designed for professional use. It provides reliable voltage and continuity measurements, ensuring safety and accuracy in various electrical applications. This manual provides essential information for the safe and effective operation, maintenance, and troubleshooting of your Fluke T150 tester.

Figure 1: Fluke T150 Voltage and Continuity Tester with its probes and included accessories.
2. Safety Information
Always adhere to local and national safety codes. Use the tester only as specified in this manual; otherwise, the protection provided by the tester might be impaired. Observe all safety precautions to prevent injury or damage to the tester.
- Voltage Rating: The Fluke T150 is rated for AC/DC voltage from 6V to 690V. Do not attempt to measure voltages exceeding this range.
- Safety Category: This device holds a CAT IV 600 V and CAT III 690 V safety rating. Always ensure the tester's rating is appropriate for the circuit being tested.
- IEC Standard: Designed according to IEC EN 61243-3:2014 to verify the absence of voltage, even with discharged batteries. However, always confirm the tester's functionality before and after use.
- Probe Condition: Inspect the test leads and probes for damage before each use. Do not use the tester if any part appears damaged.
- Personal Protective Equipment: Always wear appropriate personal protective equipment (PPE), such as safety glasses and insulated gloves, when working with electrical circuits.
- Environmental Conditions: Use the tester within its specified operating temperature and humidity ranges.
3. Product Overview
The Fluke T150 features a robust design with an ergonomic grip, integrated test leads, and a clear display for easy readings. Key components include:
- Main Unit: Houses the LCD display, LED indicators, control buttons, and battery compartment.
- Test Probes: Integrated probes for voltage and continuity testing.
- LCD Display: Backlit display showing voltage, resistance (ohms), and other relevant information.
- LED Voltage Indicators: A series of LEDs that illuminate to indicate specific voltage levels.
- Control Buttons: Buttons for functions such as HOLD, ID (identification), and switchable load.
- Audible Tone: Provides an audible indication for continuity and voltage presence.
- Tactile Feedback: Vibrates to indicate voltage presence, especially useful in noisy environments.

Figure 2: Detailed view of the Fluke T150's LCD display, LED indicators, and control buttons.
4. Setup
4.1 Battery Installation
The Fluke T150 requires one AA battery for operation. A battery is typically included with the device.
- Locate the battery compartment cover on the back of the tester.
- Use a suitable tool (e.g., a screwdriver) to open the battery compartment.
- Insert one AA battery, ensuring correct polarity (+/-).
- Securely close the battery compartment cover.
Note: Even with discharged batteries, the T150 is designed to indicate the presence of hazardous voltage, adhering to IEC EN 61243-3:2014. However, for full functionality including LCD display and resistance measurements, a charged battery is required.
4.2 Initial Check
Before each use, perform a quick check to ensure the tester is functioning correctly:
- Visually inspect the tester and leads for any signs of damage.
- Test the unit on a known live voltage source (e.g., a wall outlet) to confirm voltage indication.
- Test the continuity function by touching the two probes together; the continuity indicator should activate.
5. Operating Instructions
5.1 Voltage Measurement (AC/DC)
The T150 can measure AC and DC voltages from 6V to 690V.
- Ensure the test probes are securely connected.
- Carefully apply the test probes to the circuit points where voltage is to be measured.
- The LCD display will show the measured voltage value.
- LED indicators will illuminate corresponding to the detected voltage level (e.g., 12V, 24V, 50V, 120V, 230V, 400V, 690V).
- An audible tone and tactile feedback will also indicate the presence of voltage.
- To hold the displayed reading, press the HOLD button. Press again to release.
5.2 Continuity Testing
Use the continuity function to check for open or closed circuits.
- Ensure the circuit under test is de-energized before performing continuity checks.
- Apply the test probes to the two points of the circuit you wish to test for continuity.
- If continuity is detected (low resistance), the continuity LED will illuminate, and an audible tone will sound.
5.3 Resistance Measurement (Ohms)
The T150 can measure resistance up to 1999 Ω.
- Ensure the circuit under test is de-energized before performing resistance measurements.
- Apply the test probes to the component or circuit section.
- The LCD display will show the resistance value in Ohms (Ω).
5.4 Switchable Load
The switchable load function allows for testing circuits under load conditions, which can help identify phantom voltages or ensure proper circuit behavior. Refer to the device's on-screen prompts or specific button for activation.
6. Maintenance
6.1 Cleaning
To maintain the accuracy and longevity of your T150 tester:
- Wipe the case with a damp cloth and mild detergent. Do not use abrasives or solvents.
- Ensure the tester is completely dry before storage or next use.
6.2 Battery Replacement
Replace the battery when the low battery indicator appears on the LCD, or if the tester exhibits reduced functionality (e.g., dim display, unresponsive buttons). Follow the steps outlined in Section 4.1 for battery installation.
6.3 Storage
Store the tester in a dry, clean environment away from extreme temperatures and direct sunlight. If storing for extended periods, remove the battery to prevent leakage.
7. Troubleshooting
If you encounter issues with your Fluke T150, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Tester does not power on or display is dim. | Low or dead battery. | Replace the AA battery (refer to Section 4.1). |
| Inaccurate or erratic readings. | Low battery, dirty probes, or damaged leads. | Replace battery, clean probes, inspect leads for damage. If damage is present, discontinue use. |
| No continuity indication. | Open circuit, low battery, or faulty probes. | Verify the circuit is closed, replace battery, or test probes on a known good circuit. |
| No voltage indication on a known live circuit. | Faulty tester or probes. | Discontinue use immediately. Contact Fluke customer support. |
8. Specifications
The following table lists the technical specifications for the Fluke T150 Voltage and Continuity Tester:
| Feature | Detail |
|---|---|
| Model | T150 |
| Brand | Fluke |
| Voltage AC/DC Range | 6V - 690V |
| Safety Rating | CAT IV 600 V, CAT III 690 V |
| Measurement Type | Voltmeter, Ohmmeter |
| Resistance Measurement | Up to 1999 Ω |
| Power Source | 1 AA Battery (included) |
| Item Weight | 280 Grams (9.9 ounces) |
| Product Dimensions (L x W x H) | 2.2 x 11.89 x 3.23 inches |
| Compliance | IEC EN 61243-3:2014 |
| Display | LCD with Backlight, LED indicators |
| Indicators | LED, LCD, Audible Tone, Tactile Feedback |

Figure 3: Fluke T150 tester demonstrating its compact size and ergonomic design.
9. Warranty and Support
9.1 Warranty Information
Specific warranty terms and conditions for the Fluke T150 Voltage and Continuity Tester are provided by Fluke. Please refer to the warranty card included with your product or visit the official Fluke website for detailed warranty information.
9.2 Customer Support
For technical assistance, service, or further inquiries regarding your Fluke T150, please contact Fluke customer support or visit their official website. You can often find FAQs, additional resources, and contact information on the manufacturer's support pages.
Fluke Official Website: www.fluke.com





