A multimeter is the combination of a DC voltmeter, AC voltmeter, ammeter, and ohmmeter. Auxiliary gauges were restyled and the ammeter was replaced with a voltmeter. Every inline series-connected ammeter, including a multimeter in a current range, has a certain resistance. The D'Arsonval galvanometer is a moving coil ammeter. Standard equipment included a speedometer, an ammeter, a tool kit, and a headlight dimmer. Megolas came well-equipped, with a fuel gauge, tachometer and ammeter as standard equipment. The ammeter and oil pressure gauges were changed to warning lights. Instead of gauges, instrument cluster warning lights for oil pressure and ammeter were standard. An electrodynamic ammeter uses an electromagnet instead of the permanent magnet of the d'Arsonval movement. Instrumentation included an oil pressure gauge, an ammeter and an electric clock. Measuring devices (such as ammeter, speedometer) are spelled "-meter" in all variants of English. The most simple battery tester is a DC ammeter, that indicates the battery's charge rate. The Terraplane did not have an ammeter or an oil pressure gauge. In a hot-wire ammeter, a current passes through a wire which expands as it heats. Current can be measured using an ammeter.