OUTPUT FREQUENCY:
controls
the output frequency or pulses
per second of the electrofisher.
DUTY CYCLE:
Controls the
percentage of time the output
pulse is on out of the time from
the start of one output pulse to
the start of the next output pulse.
It also selects Burst of Pulses.
TIMER RESET:
Re s e t s t h e
seconds counter display to zero.
LCD DISPLAY:
Shows the number
of seconds the output of the unit
has been active since the last
timer reset, the peak output
voltage and current, the average
battery voltage and current, a fuel
gauge type display of the battery
voltage, heat-sink temperature
and waveform settings.
AUDIO ALARM:
Provides loud
audio warning whenever 30 volts
or more are present between
the anode and cathode and also
when the unit is first switched
on and beeping increases in
frequency as loading increases.
WARNING LIGHT:
Flashes once
per second whenever 30 volts
or more are present between
the anode and cathode and also
when the unit is first switched
on, and flashes faster as loading
increases.
E M E R G E N C Y S H U T D OW N
SWITCH:
Turns unit on when the
red button is rotated clockwise
and in the up position. Pushing
down on the button shuts the
unit off in emergency shut-down
situation.
OVERVIEW (CONT.)
CLOCKWISE:
LCD display; Power/
Emergency Shutdown Button;
Output Frequency and Duty Cycle
switches; Cover Latch.
TIMER
FREQUENCY
DUTY CYCLE
PUSH
TO RESET
OUTPUT CONTROL
50
45
10
60
40
20
70
35
25
15
80
90
120
110
100
30
VOLTAGE RANGE
LR-20
Electrofisher
Backpack
15
0
10
0
50 990
7
00
5
00
20
0
2
50
300 350
4
00
ANODE
CONTROL
CATHODE
50
990
100
700
150
500
200
400
250
350
300
ATTENTION: FRONT COVER MUST BE CLOSED FOR UNIT TO OPERATE
50
990
100
700
150
500
200
400
250
350
300
50
45
10
60
40
20
70
35
25
15
80
DC
30
5
2
PULSES
3
PULSES
GATED BURST
LR-20 Electrofisher
v.0.22
Smith-Root, Inc.
www.smith-root.com
PERIOD
DUTY
CYCLE
V
O
L
T
S
FREQUENCY
DUTY
CYCLE
V
O
L
T
S
LEFT TO RIGHT:
A:
Cathode
connector;
B:
power cord;
C:
control connector;
D:
anode
connector;
E:
immersion sensor.
Duty Cycle and Output Frequency
A
B
C
D
E
VOLTAGE RANGE SWITCH:
Controls the output voltage
of the electrofisher. Voltages
between 50 and 990 volts may
be selected.
I M M E R S I O N S E N S O R :
Automatically turns the output
off when water bridges the
sensing contacts.
ANODE CONNECTOR:
Provides
the high voltage connection for
the anode electrode.
C O N T R O L C O N N E C T O R :
Provides the low voltage control
connection to the pole switch.
C AT H O D E C O N N E C T O R :
Provides the high voltage
connection to the cathode
electrode.
B AT T E R Y C O N N E C T O R :
Provides power to the unit from
the battery.
COVER LATCH AND SENSOR:
Two over-center toggle latches
secure the front cover. Cover
must be closed and latched
before the output of the unit can
be activated.
USER’S GUIDE
3
2018