The Analog Clamp Ammeter BLOW 5858# is a handheld instrument for measuring electric current in low-current circuits. It combines a clamp jaw for non-contact conductor measurement with an internal shunt calibrated for a 5 A range and an analog needle display that shows real-time readings. The instrument provides simple range selection and zeroing controls, designed for basic current checks, troubleshooting and field diagnostics where portability and quick indication are required.
Advantages
The clamp design enables current measurement without disconnecting conductors, reducing setup time and allowing safer checks on live circuits. The built-in shunt provides a dedicated low-range capability up to 5 A, while the analog needle delivers continuous, immediate visual feedback that is useful for observing fluctuations and transient behavior. Controls are straightforward, making the device accessible to technicians who need a simple, robust tool for routine inspections.
Suitable for
- Electricians performing on-site current checks in low-current circuits
- Field diagnostics and quick troubleshooting of power supplies and small appliances
- Maintenance tasks where non-invasive measurement is preferred
- Educational demonstrations of current measurement and circuit behavior
Key specifications
- Measurement type: AC/DC clamp current measurement with internal shunt for low-range readings
- Maximum measurable current: up to 5 A (shunt-calibrated range)
- Display: analog needle pointer for continuous real-time indication
- Clamp jaw: designed for single conductor measurement without disconnection
- Controls: manual range selection and zeroing adjustment
- Form factor: handheld, portable instrument suitable for field use
How to use
Before use, verify the instrument is in good condition and the needle rests at zero when the clamp is empty; adjust zero if the device provides a zeroing control. Select the appropriate measurement mode or range for the expected current level. Open the clamp jaw, place it around a single conductor only, and close the jaw fully. Read the current directly from the analog needle scale. Avoid placing multiple conductors inside the clamp simultaneously, as this will affect the reading. When measurements are complete, open the clamp and store the instrument in a dry, protected place.
Usage recommendations
Use the device within its specified low-current range and avoid overloading the shunt. Ensure the clamp is centered on a single conductor for accurate readings. For safety, follow standard electrical precautions when working on live circuits and confirm the instrument zero before critical measurements.
