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3. SPECIFICATIONS
Range @ Vp=70%:
6000 ft (2000m)
Resolution (m):
0.1 m up to 100 m, then 1 m
Resolution (ft):
0.1 ft up to 100 ft, then 1 ft
Accuracy*:
±2% of reading
Minimum Cable Length:
12 ft (4m)
Cable Library:
On board
Vp (Velocity of Propagation):
Adjustable from 0% to 99%
Output Pulse:
5Vpp into open circuit
Output Impedance:
Automatic compensation
Output Pulse:
Nanosecond rise Step Function
Display Resolution:
128 x 64 pixel graphical LCD
Display Backlight:
Electroluminescent
Tone Generator:
Oscillating tone 810Hz - 1110Hz
Voltage Warning:
Triggers @ >10V (AC/DC)
Power Supply:
4 x 1.5V AA alkaline batteries
Auto-off:
after 3 minutes
Storage Temperature:
-4 to 158°F (-20 to 70°C)
5 to 95% RH non-condensing
Operating Temperature:
32 to 112°F (0 to 40°C)
5 to 95% RH non-condensing
Altitude:
6000 ft (2000m) max
Dimensions:
6.5 x 3.5 x 1.5" (165 x 90 x 37mm)
Weight:
12 oz (350g)
Safety:
IEC61010-1
EN 60950
Index of Protection:
IP54
EMC:
EN 61326-1
CE:
Compliance with current EU directives
*Measurement accuracy of ±2% assumes the instrument setting for velocity of propa-
gation (Vp) of the cable under test to be accurately set, and homogeneity of the velocity
of propagation (Vp) along the cable length.
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4. OPERATION
4.1
Principles of Operation
The Fault Mapper™ works by measuring the time taken for a signal to travel to the far end of
the cable under test, or to an intermediate fault, and return.
The velocity at which the signal travels, or Velocity of Propagation (Vp), will depend on the
characteristics of the cable.
Based on the selected Vp and the measured travel time of the test pulse, the Fault Mapper™
calculates and displays distance.
4.2
Accuracy and Velocity of Propagation (Vp)
The Fault Mapper™ measures distances to faults and cable lengths to an accuracy of ±2%.
This measurement accuracy is based upon the correct value of Vp being used for the cable
under test, and homogeneity of the Vp along the cable length.
If the Vp is set incorrectly by the operator, or the Vp varies along the length of the cable, then
additional errors will be incurred and the measurement accuracy will be affected.
See § 4.8 for setting the Vp.
NOTE: The Vp is less well defined with unshielded multi-conductor cable, including power
cable, and is lower when a cable is tightly wound on a drum than when it is installed in a
linear fashion.
4.3
Getting Started
The instrument is switched on and off using the green power button
right side of the front panel .
When the unit is first switched on it will display the opening screen giving the software
version, the currently selected cable type/Velocity of Propagation, and remaining battery
capacity.
Fault Mapper V0.2B
Appletalk
Vp=66%
I
, found on the lower
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