Analog Clamp Ammeter BLOW 51-030 — 30 A range, analog needle display, side clamp

The BLOW 51-030 analog clamp ammeter measures alternating current up to 30 A using an analog needle display and a side clamp design that enables quick non-contact readings. Designed as a compact and portable diagnostic instrument, it is intended for technicians and electricians working on household and light industrial circuits, offering a straightforward way to monitor current without interrupting the circuit.

Advantages

The side clamp allows rapid clamping around a conductor for instantaneous current measurement while the analog needle provides continuous, easy-to-read indication of changing values. The instrument's compact form factor and mechanical simplicity reduce the need for batteries and complex setup, making it suitable for field use. The analog display also offers a clear visual trend of current variations, helping to spot transient conditions that may be missed on digital samplings.

Suitable for

• Measuring AC current in household electrical circuits
• Troubleshooting lighting and small motor circuits
• Maintenance checks in workshops and light industrial environments
• Quick field diagnostics by electricians and service technicians

Key specifications

• Measurement type: alternating current (AC)
• Maximum measurement range: 30 A
• Display: analog needle (mechanical pointer)
• Clamp orientation: side clamp for single-conductor measurement
• Form factor: compact and handheld for portable use

How to use

Place the clamp around a single conductor while keeping the circuit energized; ensure the clamp fully encircles only one conductor to obtain a correct reading. Read the current value directly from the analog needle against the instrument scale, observing the needle movement to detect steady-state or fluctuating currents. Follow standard safety procedures: avoid contact with live conductors, use appropriate personal protective equipment, and ensure the clamp jaw is clean and free of debris to maintain measurement accuracy.

Usage recommendations

For accurate readings, measure one conductor at a time and avoid placing multiple conductors inside the clamp. Periodically verify the instrument against a reference meter and inspect the clamp jaws for wear or contamination. Store the ammeter in a dry, temperature-stable environment to preserve mechanical components and the analog mechanism.