LD-12 Professional’s Plus
Water Leak Detector
Operating Instructions
Headphones Jack
LD-12
Quick Reference
Guide
WARNING!
Do not drop the sensor hard on to
asphalt, concrete, valves, or other surfaces from
2-3 feet or more. The sensor has a piezo electric
ceramic element, and it can be broken by hard
drops or harsh treatment.
3.
There are 3 Low Filters and 3 High Filters.
The LD-12 user hears all of the sounds between
the two filters that are ON. All sounds that are in
frequencies lower or higher are filtered out.
6.
The meter on the amplifier is used for comparing
the loudness at different locations when the user’s
hearing can not tell which location is louder.
Adjust the Volume Control to move the meter needle
to a midrange position. Then compare meter
readings at different locations.
8.
The Limitter Switch
cuts off all sounds
greater than 110 dB
in the ON position.
The Filter-Thru
Switch bypasses
all of the filtering
in the ON position.
7.
The headphones jack is “power switched”.
If the headphones are not plugged in, the
amplifier’s power does not go ON:
5.
The amplifier has a large Meter Display, Volume
Control, Adjustable Filters, ON/OFF Power Switch,
Battery Power Switch, and a Light Switch:
4.
LD-12 Professional’s Plus Water Leak Detector
includes accessories for water leak “pinpointing” and
water leak “surveying”:
1.
Sensor
Cable
Jack
WARNING!
The LD-12 is very sensitive and can
damage hearing if not used properly. Keep the sensor
motionless when the Mute Switch is depressed, and
keep the Volume below 25% when attaching to a
hydrant, meter, or valve that may be very loud.
2.
Ground Miking to pinpoint a leak in a
hydrant line
Leak Surveying by listening at a
hydrant with magnet base
Leak Surveying by listening at a
meter with contact rod
Standard Accessories
for LD-12
Amplifier
Side
View
Amplifier Top View
Volume
Control
ON/OFF
Power
Meter
Display
Adjustable Filters
Battery Power
Amplifier with Meter Display and Filter Controls
Ground Microphone and Handswitch (Mute)
Aviation-Grade Stereo Headphones
Heavy-Duty ABS Plastic Carrying Case
Magnet Base
3-Section Contact Rod
Nut Driver (to remove base)
Instruction Manual (not shown)
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