There are some applications where using an ammeter is the only way to troubleshoot a problem without tearing apart the entire circuit. It is the only meter setting on the DMM used while the circuit is energized. After calculating the amperage that should flow through the circuit by measuring ohms and volts, an ammeter directly shows any "tell tale" discrepancies between calculated amps and actual amps. Example: In theatre lighting, a volt meter reads 110V on a power circuit, and an ohmmeter reads close to 0 when measuring across a lamp's power connector leads; yet, when connected, the lamp won't light and the breaker doesn't trip. In theory, 110V across a lamp reading 0 ohms should light the lamp. A quick bit of minor surgury and a measure with the ammeter "tells the tale" that very little current is flowing; therefore, one of the digital dimmer packs has probably gone bad -- it will provide a phantom power of 110V with little current. Without the ammeter, one would have to waste time troubleshooting the dimmer itself.
It is called a Tell Tale because it tells you the current of the circuit.
An a ammeter is called a tell tale because it directly shows discrepancies between calculated amps and actual amps. This is used to troubleshoot a problem without having to tear apart an entire circuit.
A ammeter will tell you how much current draw the load is drawing
Living to Tell the Tale was created in 2002.
The duration of The Tell Tale Wire is 1200.0 seconds.
The ISBN of The Tell-Tale Brain is 978-0393077827.
The Tell-Tale Brain has 357 pages.
The Tell-Tale Heart was created in 1843-01.
The narrator keeps insisting that he is not mad in "The Tell-Tale Heart."
The Tell Tale Wire was created on 1919-10-18.
The Tell-Tale Message was created on 1912-11-20.
"The Tell-Tale Heart" is not a pun. It is a short story by Edgar Allan Poe that tells the tale of a murder from the perspective of the killer. The title refers to the guilt of the killer that manifests as a "tell-tale" sound.