Promax Cable Ranger+ User Manual page 8

The Voltage Input function automatically identifies the type of voltage
(continuous or alternating) at the input, the voltage and displays the output
current.
The Optical Power Meter function measures the optical power and other RFoG
(Radiofrequency-over-Glass) measurements.
In addition, it includes other tools such as datalogger, screenshot, channel plan
editor, etc.
In short, implementation of all these functions into an light instrument,
ergonomic design and robust, makes the RANGER into a productive
CABLE
and efficient fieldwork tool for the installer.
Chapter 1: INTRODUCTION 3 March 2020