6
QUICK-START GUIDE
2019
form. Once complete, press BACK
button to return to home screen.
a. Direct Current (DC) – Continu-
ous, uninterrupted current flows
from APEX between anode and
cathode. This method is generally
favored for use with endangered
and threatened species.
DC does create a higher power
demand from the generator.
b. Pulsed - Pulsed Direct Current (PDC) is pulsed at a user-defined
frequency and duty cycle. This is the most commonly used elec-
trofishing waveform because of its balance of moderate power
use, increased capture efficiency over DC, and decreased injury
potential over AC.
c. Burst – Current is pulsed in packets of bursts with defined gaps
of electrical output between bursts. This waveform is commonly
used to remove fish from heavy cover or juvenile lamprey from
sediments.
d. Alternating Current (AC) - Current reverses polarity on the fre-
quency of the output from the generator (only available up to
347 volts RMS). This waveform is uncommonly used with the
exception of eradication studies or on the extremes of water
conductivity.
ii. Frequency – Determines the rate of
electrical pulsing. To modify frequen-
cy, press FREQUENCY button, then
use arrows to increase and decrease
values. Press HELP button for a de-
scription of Frequency. Once com-
plete, press BACK button to return to
home screen.
a. 7.5 – 15 Hertz – Low frequency is
commonly used with Pulsed Di-
rect Current Waveform to capture catfish and other electrically
sensitive bottom dwelling fish. Fish are often active, requiring
active netting.
Screenshot: Waveform types
Screenshot: Frequency
