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Ampere-hour meter
An ampere-hour meter integrates current over time for a documented measurement purpose.
SLD / Schematic
IEEE / ANSI · Ah
ANSI/IEEE ampere-hour meter symbol
IEEE-library ampere-hour meter form for integrating charge in DC circuits such as battery and plating supplies.
In plain English
What does ANSI/IEEE ampere-hour meter mean?
An ampere-hour meter integrates current over time and is most often drawn in DC battery, charger and electrochemical supply circuits. It is normally fed from a shunt, so the schematic should show the shunt, its millivolt rating and the polarity of the sensing leads alongside the meter.
A simple example
The symbol does not say whether the register counts charge in one direction only or nets charge and discharge. Battery state-of-charge estimation depends on that setting and on efficiency correction, neither of which is visible from the instrument form.
What the drawings help you do
Find the shunt or sensor that supplies the current signal. Confirm whether the register is unidirectional or bidirectional. An ampere-hour meter accumulates charge; an ammeter shows instantaneous current and a kWh meter accumulates energy.
This particular reference
IEEE-library ampere-hour meter form for integrating charge in DC circuits such as battery and plating supplies. An ampere-hour meter accumulates charge; an ammeter shows instantaneous current and a kWh meter accumulates energy.
- DC
- Direct current: electricity flowing in one direction.
- Rating
- A value stating the conditions for which equipment is specified.
- Schematic
- A drawing showing function and connections rather than physical appearance.
Read the source: Autodesk IEEE Symbol Preview — Instrumentation and Sensors · IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
IEEE / ANSI · Autodesk IEEE-oriented Instrumentation and Sensors form: Ampere-Hour meter
Autodesk publishes this block under its IEEE Symbol Preview. The counterpart is the matching functional concept in the library; no equivalence of every detailed standard graphic is asserted.
Shown as an independently authored educational illustration. Use the cited publication and drawing legend to verify the required drafting form.
Schematic / SLD · Ah
What it represents
An ampere-hour meter integrates current over time and is most often drawn in DC battery, charger and electrochemical supply circuits. It is normally fed from a shunt, so the schematic should show the shunt, its millivolt rating and the polarity of the sensing leads alongside the meter.
The symbol does not say whether the register counts charge in one direction only or nets charge and discharge. Battery state-of-charge estimation depends on that setting and on efficiency correction, neither of which is visible from the instrument form.
How to read it
- Find the shunt or sensor that supplies the current signal.
- Confirm whether the register is unidirectional or bidirectional.
Information to show or reference
- Reference the shunt rating
- Show sensing polarity
- State register direction
A distinction that matters
An ampere-hour meter accumulates charge; an ammeter shows instantaneous current and a kWh meter accumulates energy.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Autodesk IEEE Symbol Preview — Instrumentation and Sensors
Public IEEE-oriented Instrumentation and Sensors preview listing the Ampere-Hour meter block and its vendor identifier.
IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams
Graphic-symbol standards context and official status; not a source of reproduced artwork.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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