The Martindale FD550 is a digital fuse finder kit, with microprocessor controlled multi-level sensitivity for fuse and breaker identification. The 6 segment bar graph shows progressive indication of the signal strength, allowing for even faster identification. In addition, the Elite Fuse Finder also incudes a non-contact voltage indicator.

There are two modes of operation for the FD550:

Automatic Mode: Has a memory & auto adjusting of sensitivity for foolproof identification

Manual Mode: Allows for rapid fuse finding using the bar graph

Each Martindale FD550 fuse finder is supplied with a receiver, transmitter, batteries and instruction manual.

Transmitter

Transmission Pulse Width

• approx 1.7µS width

Transmission Pulse Amplitude

• 20A max

Frequency Range

• 50 - 60Hz

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

• Via digital stepping

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 FD550 Specification Sheet

Martindale FD550 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.