Features
The instrument consists of two identical optical input channels connected to a timer.
The time difference between arrival of the first impulse at each channel (START and STOP) is measured and displayed on a liquid crystal display, which is easily read in daylight and poor lighting.
Operation
The START and STOP LED's lights up when the relevant input is activated. Before taking the measurement, the timer and the display must be cleared by pressing the RESET button. The unit is powered by a replaceable PP3 9V Zinc Carbon battery and is capable of over 15 hours of continuous use.