11. Standard equipment included a speedometer, ammeter , a tool kit, a heallight dimmer. 12. Never test a battery with an ammeter , only with a load resistor and a voltmeter. 13. Ammeters have very low internal resistances.14. When all resistances are placed in parallel with R m maximum sensitivity of ammeter is reached. 15. Digital ammeter designs use a shunt resistor to produce a calibrated voltage proportional to the current flowing. 16. The ammeter was the gauge of choice for monitoring the state of the charging system until the 1970s. 17. Initially this meant full instrumentation ( including ammeter , oil pressure gauge, clock ) and a radio. 18. On the left pod were the fuel and water temperature gauges with no oil pressure and ammeter gauges present. 19. The instruments and controls were rudimentary, solenoid type gravity balance Voltmeters and ammeters mounted on lacquered wooden boards. 20. The plant opened in 1939, employing up to 19 people making cigarette lighters, ammeters , and switches.
