
25
On LED indicator, and Calibration Check/Test
switch are also provided. A programmable
micro jumper located inside the Adapter is
provided so that the user may easily select
either Feet or Meters as the unit of measure-
ment to be digitally displayed.
MFL-92 Fault Locator System
The Fault Locator System is designed to detect
and locate the alarm point (shorted) on the
Protectowire Linear Heat Detector. Unlike the
APL-90 Meter Adapter which determines the
alarm location based upon conductor resis-
tance readings which are subject to variations,
the Fault Locator System is able to locate the
exact location of the actuated section by using
an advanced audio signaling technique.
The MFL-92 consists of two modular units. A
Tone Generator Model FDG-92 and a Tone
Receiver Model FDR-92. Both modules are
housed in durable ABS plastic enclosures
each small enough to be hand carried. Each
module weighs less than 8 ounces (227 g).
The FDR-92 Tone Receiver is powered by one
9 volt Type 1604 battery with an average life of
50 hours. The unit contains a tone signal pick-
up LED indicator and two phone jacks. One
for the exploring Pickup Head and one for an
optional earphone for use in areas where the
ambient noise level is high.
The second module which is the FDG-92 Tone
Generator, is powered by one 9 volt Type
1604A Alkaline battery. Depending upon the
load that the device is connected to, the expect-
ed battery life will range from 4 to 20 hours.
CCoonnvveerrssiioonn FFaaccttoorrss
• 1 inch = 2.54 cm
• 1 foot = 3.05 decimeters
• 1 millimeter = .04 inches
• 1 centimeter = .39 inches
• 1 meter = 3.28 feet
• F° = Degrees Fahrenheit
F° =
9
/
5
C° + 32°
• C° = Degrees Celsius (Centigrade)
C° =
5
/
9
(F°–32°)
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