APPENDIX C: GLOSSARY OF TERMS
Amp:
The unit of measure expressing the quantity of electricity flowing in a circuit.
Analogous to water quantity flowing in a pipe. Amp is an abbreviation for
Ampere.
Anode:
The positive terminal on a battery or forward facing electrode on an LR-24.
Cathode:
The negative terminal on a battery or rear facing electrode on an LR-24.
Conductivity:
A measure of the ease with which electricity can flow through a substance.
In electrofishing, the substance of interest is water. Conductivity is measured
in mS (micro-Siemens, or millionths of a Siemen). Distilled water has a
conductivity of 0 mS, while brackish water has a conductivity of 10,000 mS
or more.
Current:
Generic term that refers to the flow of electricity in a circuit. Unit of measure
is the Amp.
Duty Cycle:
Expresses the ratio, in %, of on time for an electrical signal such as an LR-24
output. For example, if an LR-24 output is ON for .25 seconds and OFF for
0.75 seconds, the duty cycle is (0.25/(0.25 + 0.75)) x 100=25%.
Electrofisher:
An apparatus that applies electricity to a body of water for the purpose of
stunning fish.
Frequency:
The rate at which an electrical signal changes over time. The unit of measure
is the Hertz. One Hertz is equal to one change (cycle) per second and is
abbreviated Hz. For example, if an LR-24 is producing 60 pulses per second,
the frequency would be 60 Hz.
Hertz:
The unit of measure for frequency. See Frequency.
IP:
Acronym for Ingress Protection. Various IP standards exist that specify the
ability of an enclosure to keep out contaminants such as dust and water. IP65
applies to the LR-24 enclosure and signifies that it is dust-proof and will protect
from a water-jet spray in all directions, but is not suitable for immersion.
mA:
Milliamp. One thousandth of an Amp; see AMP.
mSec:
Millisecond. One thousandth of a second.
NEMA:
Acronym for National Electrical Manufacturers Association. NEMA sets
contamination protection standards that apply to the LR-24 enclosure.
Operational
Duty Cycle:
Expresses the ratio in percentage of shocking time to battery power on time.
Volt:
The unit of measure expressing the ‘pressure’ behind an electrical current.
Analogous to water pressure pushing water through a pipe.
Volt-Amp:
Unit of measure of electrical power equivalent to the Watt. Abbreviated VA.
Watt:
Unit of measure of electrical power. 1 Watt = 1Amp * 1Volt. Abbreviated W.
USER’S GUIDE
25
2018