| CIRCUIT MEASURING DEVICES - AMMETER SAFETY | ||
An ammeter is always connected in series with the circuit being measured so it actually becomes part of the circuit. It should also have the smallest resistance possible so the effect of the ammeter on the circuit will be kept to a minimum. Ammeter sensitivity is often mentioned with these devices. Sensitivity is the amount of current required to trigger full-scale deflection of the device’s indicating needle. Obviously, the smaller this value is, the more sensitive the device. The safety precautions shown here should always be observed when using an ammeter. |
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