# ANSI/IEEE frequency meter symbol

Canonical URL: https://eloragrid.ai/symbols/ansi-frequency-meter
Publisher: Elora Grid
Updated: 2026-10-14
Lookup label: Hz
Drawing use: SLD, Schematic
Reference families: IEEE / ANSI, Manufacturer

## Symbol convention

Convention: IEEE / ANSI
Form: Autodesk IEEE-oriented Instrumentation and Sensors functional form
Autodesk explicitly publishes this block under IEEE Symbol Preview. The counterpart is the matching functional concept; no equivalence of every detailed standard graphic is asserted.
Related representation: [Frequency meter](https://eloragrid.ai/symbols/frequency-meter)

IEEE-oriented graphical reference for frequency meter, with public vendor evidence and drawing-reading notes.

## What it represents

The frequency-meter form identifies the frequency of a specified measurement source. When several buses or generators appear on the drawing, the input path and selection switch determine which source is being indicated.
This is a convention-specific lookup based on the publisher's IEEE-labelled preview. The geometry here is independently drawn to explain the connection or operation; it is not a certified reproduction of the standard graphic.

## How to read it

- Read the source selection before interpreting the value.
- Read the selected library and the project legend together. A vendor block identifier is meaningful within its named library and is not a universal standard-symbol code.

## Information to show or reference

- Name measured source
- Reference input range
- Show source-selection wiring

## Important distinction

Frequency indication differs from an underfrequency relay's trip or load-shed criterion.

## Facts

- Convention evidence: Autodesk IEEE Symbol Preview — Instrumentation and Sensors
- Public vendor block name: HIN1FRM (Autodesk identifier; not an IEEE symbol number)
- Standards context: IEEE/ANSI 315-1975 covers diagram graphics. IEEE lists this edition as Inactive-Reserved.
- Artwork scope: Original functional illustration; exact standard glyph and compliance are not certified

## Public references

- [Autodesk IEEE Symbol Preview — Instrumentation and Sensors](https://help.autodesk.com/cloudhelp/2021/ENU/AutoCAD-Electrical/files/GUID-F44D5059-4728-40BD-B9BA-0DE7CFDFAACF.htm) — Autodesk. Exact public IEEE-oriented category page verifying the component name and vendor block identifier.
- [IEEE/ANSI 315-1975: graphic symbols for electrical and electronics diagrams](https://standards.ieee.org/ieee/315/515/) — IEEE Standards Association. Graphic-symbol standards context and official status; not a source of reproduced artwork.

## Graphic scope

Independent original educational concept illustration by Elora Grid. Not a certified standards graphic or manufacturer footprint. Unitless; not to scale. Original artwork licence: https://creativecommons.org/licenses/by/4.0/. Publisher material is linked only.