198010 - Frederiksen

The length of the fall s can be measured using aruler. Measure the distance from the bottom of theball when it is mounted in the release mechanism tothe strike plate. The mirror provided can be helpfulwhen making this measurement to avoid parallaxerror. See Figure 2.Important!In order to ensure as good a connection as possibleboth the contact plates and the steel ball are goldplated and must be kept absolutely clean. They canbe cleaned using an organic solvent. Some peoplehave moist fingers, and this can make it difficult toachieve good contact. The use of thin cotton glovescan be helpful in this case.Figure 2.OperationThe apparatus is assembled as shown in Figure 2.The release mechanism is readied by compressingthe spring release (1). The steel ball is placed in thedepression (5) between the contact plates (4) on therelease mechanism. The steel ball is released bypressing the push button. The connection betweenthe plates is broken, and the counter starts. Whenthe steel ball hits the strike plate placed verticallybelow the release point the counter is stopped.MaintenanceThe release mechanism spring should be relaxedduring storage. It is important to keep the ball andthe contact plates clean.Essential accessories:2002.50 Electronic counter.0001.00 Support stand base.0008.00 Support stand.0023.00 Stand fitting.Test leads - 4 ea.Spare parts1980.11 Extra set of gold plated steel balls.2