Introduction
The FLIR VT8-600 is a high-quality voltage, continuity, and current tester, ideal for electricians and service technicians who troubleshoot and verify electrical installations or systems within light commercial and industrial facilities. The optimized open-jaw design of the VT8-600 allows it to access tight spaces and reliably measure large-diameter cables. Comprehensive measurement features make the FLIR VT8-600 a versatile tool – one meter can get the job done. Carry the compact tester in your pocket to be ready at any moment for easy troubleshooting and repair. It features a CAT III-600V/CAT IV-300V safety rating and a measurement range of 100A/600V.
Setup
1. Battery Installation
The FLIR VT8-600 requires 2 AA batteries for operation, which are included with the device. To install or replace batteries:
- Locate the battery compartment cover on the back of the unit.
- Use a suitable tool (e.g., a small screwdriver) to open the battery compartment.
- Insert the 2 AA batteries, ensuring correct polarity (+/-) as indicated inside the compartment.
- Securely close the battery compartment cover.
2. Connecting Test Leads
For measurements requiring test leads (e.g., voltage, resistance, continuity, capacitance), connect the leads to the appropriate input jacks on the bottom of the device.
- Insert the black test lead into the 'COM' (common) jack.
- Insert the red test lead into the 'VΩ' jack for voltage, resistance, continuity, and capacitance measurements.

Image: Rear view of the FLIR VT8-600 showing the battery compartment and test lead connections. The black lead is connected to the 'COM' port and the red lead to the 'VΩ' port.
Operating Instructions
The FLIR VT8-600 features a rotary dial for mode selection and dedicated buttons for additional functions.
1. Power On/Off and Mode Selection
Turn the rotary dial to the desired measurement function to power on the device. Turn the dial to 'OFF' to power off the device.
2. Measurement Functions
- AC/DC Voltage Measurement (V∼ / V—)
Select the voltage mode on the rotary dial. Connect the test leads in parallel to the circuit or component to measure voltage. The device supports up to 600V. - AC/DC Current Measurement (A∼ / A—)
Select the current mode on the rotary dial. Use the open jaw to clamp around a single conductor to measure current. The device supports up to 100A. Ensure the conductor is centered within the jaw for accurate readings.
Image: The FLIR VT8-600 being used to measure current by clamping its open jaw around a wire inside an electrical panel.

Image: A close-up of the FLIR VT8-600 measuring current with its open jaw around a thick black cable within an electrical distribution box.
- Resistance Measurement (Ω)
Select the resistance mode. Connect the test leads across the component when it is de-energized. - Continuity Test (⚡)
Select the continuity mode. Place the test leads across the circuit or component. A continuous tone indicates continuity. - Capacitance Measurement (‡)
Select the capacitance mode. Connect the test leads across the capacitor. Ensure the capacitor is discharged before testing.
3. Special Functions
- MODE Button: Toggles between AC and DC measurements or other sub-functions within a mode.
- REL/ZERO Button: Used for relative measurements or to zero out the display for current measurements.
- HOLD Button: Freezes the current reading on the display. Press again to release.
- Backlight/Work Light Button: Activates the display backlight and the integrated LED work light for improved visibility in dimly lit environments.

Image: The FLIR VT8-600 held by a gloved hand, with red and black test leads inserted into an electrical panel to measure voltage.

Image: The FLIR VT8-600 showing a voltage reading on its backlit display, with test leads connected and positioned near an electrical panel.
Maintenance
Cleaning
To ensure optimal performance and longevity of your FLIR VT8-600, follow these cleaning guidelines:
- Wipe the exterior of the device with a clean, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the device is powered off and disconnected from any electrical circuits before cleaning.
- Keep the display clean and free from dust or smudges for clear readings.
Battery Replacement
Replace batteries when the low battery indicator appears on the display. Refer to the 'Battery Installation' section under Setup for detailed instructions.
Storage
When not in use, store the FLIR VT8-600 in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the batteries to prevent leakage.
Troubleshooting
If you encounter issues with your FLIR VT8-600, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Dead or incorrectly installed batteries. | Check battery polarity or replace batteries. |
| Inaccurate readings. | Incorrect mode selected; poor test lead connection; external interference. | Ensure correct mode is selected. Re-seat test leads. Move away from strong electromagnetic fields. |
| No continuity tone. | Open circuit; faulty test leads. | Verify the circuit is closed. Check test leads for damage or replace them. |
| Display is dim or flickering. | Low battery. | Replace batteries. |
If the problem persists after attempting these solutions, please contact FLIR customer support.
Specifications
| Feature | Detail |
|---|---|
| Manufacturer | FLIR |
| Part Number | VT8-600 |
| Item Weight | 163 g |
| Product Dimensions | 5.3 x 3.5 x 21 cm |
| Batteries | 2 AA batteries required (included) |
| Item Model Number | VT8-600 |
| Color | Black |
| Style | 100 Amp / 600 Volt |
| Power Source Type | Corded Electric |
| Number of Item Subunits | 1 |
| Measurement System | Metric |
| Measurement Accuracy | +/-0.5% |
| Compliant Specifications | CAT III-600V / CAT IV-300V |
| Included Components | VT8-600, Silicone Test Leads, Carry Case, 2 x AA Alkaline Batteries |
| Battery Cell Type | Alkaline |
| Date First Available | September 14, 2023 |
| Upper Temperature Rating | 50 ℃ |
| Measurement Type | Voltmeter, Ammeter, Ohmmeter |
| UPC | 793950386002 |
Warranty Information
The FLIR VT8-600 comes with a 3-year limited warranty. This warranty covers defects in materials and workmanship under normal use. For specific terms and conditions, please refer to the warranty card included with your product or visit the official FLIR website.
Customer Support
For technical assistance, product inquiries, or warranty claims, please contact FLIR customer support through their official channels:
- Website: Visit the official FLIR website for support resources, FAQs, and contact forms.
- Phone: Refer to the contact information provided in your product packaging or on the FLIR website for regional support numbers.
When contacting support, please have your product model (VT8-600) and serial number (if applicable) ready.





