A railroad tester is multimeter designed specifically for use in railroad signaling and communications testing. Railroad testers measure the signal parameters of railroad coding equipment.
Railroad testers directly measure code parameters like Peak Hold, Peak Follow, Rate, and On Time in any AC or DC range. Testers may include cab filter options to allow measurements for selected cab frequencies without shutting down equipment.
Typical railroad resters are analog to display rapidly changing measurements. They report up to 500 counts per minute and are accurate within 3 percent.