voltage, frequency, and duty
cycle should be done outside
of your sample area to avoid
influencing your statistics.
1. Make sure the power button
on top of the control unit is
in the off position (Down).
2. Attach the anode and cath-
ode to their output connec-
tors.
3. Attach the smaller connec-
tor on the anode cable to
the control connector of
the unit.
4. Be sure you know the loca-
tion of the quick release
buckles for the backpack,
and unlatch the chest strap
before entering or crossing
the water.
5. Check with each crew
member to be sure they
know you are ready to turn
on the power.
6. Connect the battery.
When
using a lithium battery,
Attach the multicolored
lithium adapter (part #
10791) to the battery and
attach the red and black
connector pair from the
adapter to the red and
black connector pair on
the LR-20B.
7. Turn on the power. Do not
press the anode switch.
Check the operation of
the tilt switch by bend-
Battery Connector
Anode & Cathode Connectors
Immersion Sensor
ing forward until the tilt
switch activates, (about
55 degrees), and the tilt
message appears on the
display. Straighten up and
the status display should
return. If the tilt message
does not appear, do not use
the electrofisher; send it to
Smith-Root for repair.
8. Place a dampened cloth on
the immersion sensor con-
tacts located on the lower
left-hand corner of the con-
trol unit's box, behind the
cathode connector. The
display should show the
immersion warning. When
the cloth is removed and
the power is turned off and
back on, the display should
return to the status screen.
If the immersion message
does not appear, do not use
the electrofisher; send it to
Smith-Root for repair.
9. Set the frequency, duty
cycle, and voltage switches
to the values you wish to
use. If you don't know
what values to use, set the
switches as shown below
and follow the procedure
in the next step. NOTE: The
front cover of the electro-
fisher must be closed to
activate the output.
• Frequency 15 Hz.
• Duty cycle 10 percent.
• Voltage 50 volts.
OPERATION
Make sure the Electrode ring is clean and shiny. A cloudy,
dull-gray Electrode ring will reduce your catch per unit
effort and will increase the injury rate of fish. Initial setup of
Power Button
OPERATION
LR-20 SERIES BACKPACK ELECTROFISHER
8
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