The Martindale FD500 is an analogue fuse finder kit, which locates fuses or breakers controlling a circuit. Circuits can also be traced from socket to socket.

The transmitter is mains powered and emits a signal for the receiver to pick up. The receiver has an adjustment wheel to increase or decrease the sensitivity. This combination makes tracing fuses much easier, even on a crowded fuse board.

The FD500 fuse finder is supplied with a transmitter, receiver, batteries and instruction manual.

Transmitter

Transmit Signal

• approx 5Hz; 20A (max) pulse of 1.7µS width

General Specifications

• Temperature Range: -10°C to 40°C at max 60% RH
• Earth Leakage: Nil
• Mains Supply: 230V, 30 - 70Hz
• Power Consumption: 1W approx
• Overvoltage: CAT III 300V
• Protection Class: IP20
• Dimensions: 65 x 65 x 46mm approx
• Weight: 60g

Receiver

Tracing Depth

• 0 - 10cm, for fuse assignment (depending on local conditions)

Sensitivity Control

• Rotary thumbwheel on the housing

General Specifications

• Temperature Range: -10°C to 40°C at max 60% RH
• Protection Class: IP20
• Power Supply: 9V Battery (PP3 / MN1604) alkaline only
• Dimensions: 160 x 55 x 30mm
• Weight: 135g approx
• Units are EMC compliant

Martindale FD500 Specification Sheet

Martindale FD500 Instruction Manual

Can the Fuse Finder be used to troubleshoot dead circuits?
No, the transmitter is powered by the circuit under investigation.

What is the range of the Fuse Finder?
Depending on the type of cable in use, the range could be up to 200 metres.