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INTRODUCTION
The Cable Distance Meter is a unique, handheld instrument, primarily used for the
measurement of the height of overhead cables. The Cable Distance Meters measure
up to 6 cables.
The CDM-50 model measures to a height of up to 50 feet (15m). The CDM-75 model
has an increased range of up to 75 feet (23m). The unit operates by transmitting an
ultra-sonic signal towards the wires, and measuring the time it takes to pick up the
echo from that signal. It automatically compensates for the fact that the speed of
sound varies with temperature by monitoring the ambient temperature using the
internal temperature sensor. The display continuously shows the ambient temperature
reading. Because the temperature sensor reacts relatively slowly to large temperature
changes, it is necessary to wait up to 10 minutes for the temperature reading to stabilize
after taking the meter suddenly from a warm to a cold environment before taking a
measurement, e.g. taking the unit from inside a warm vehicle to outside. Isolate the
CDM from any hot surface such as sun warmed pavement using a notebook or several
sheets of paper.
Cone
Transducer
Temp Indicator
Measurement Units
Height Measurement
ON Switch
CAL Mode
Stored Measurements
Temperature Sensor
Read Stored Measurements
Make Measurement
Clear memory
Battery Compartment
(Side of Unit)
Summary of Contents for CDM-50
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