LR-24 Electrofisher - Field Environmental Instruments
LR-24 Electrofisher - Field Environmental Instruments
LR-24 Electrofisher - Field Environmental Instruments
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SAFETY FEATURES<br />
USER'S MANUAL<br />
Safety Features Descriptions (Cont.)<br />
Tilt Switch<br />
The tilt switch automatically turns off the output of the <strong>LR</strong>-<strong>24</strong> if the<br />
<strong>LR</strong>-<strong>24</strong> is tipped too far from vertical in any direction. The maximum<br />
forward tilt is 55 degrees from vertical. The maximum backward<br />
tilt is 35 degrees from vertical. The maximum side to side tilt is 45<br />
degrees from vertical +/- 10 degrees.<br />
If tilted beyond these limits, an error message is displayed. This<br />
condition is reset by moving to a more vertical position and releasing<br />
and pressing the anode pole switch.<br />
55°<br />
35°<br />
Immersion Sensor<br />
If the lower end of the <strong>LR</strong>-<strong>24</strong> comes into contact with the water, the<br />
output is automatically shut off and an error message is displayed.<br />
This condition is reset by moving the <strong>LR</strong>-<strong>24</strong> case out of contact<br />
with the water and then turning the power off and back on again.<br />
Note that if the battery compartment has filled with water, it must<br />
be drained before resetting the <strong>LR</strong>-<strong>24</strong>.<br />
Anode Out of Water<br />
This feature disables the output of the <strong>LR</strong>-<strong>24</strong> and displays an error<br />
message whenever the anode pole switch is depressed and less than<br />
30 milliamps, mA, of current is flowing between the anode and<br />
cathode. To restart the <strong>LR</strong>-<strong>24</strong>, place the electrode in the water and<br />
press the anode pole switch.<br />
For working in very shallow water, this feature can be turned off<br />
using System Menu 5: Anode Out of Water Disable.<br />
Note: This function is reactivated automatically when battery power<br />
is turned off and back on.<br />
Output Voltage Detector<br />
This circuit senses voltage between the anode and cathode of the<br />
<strong>LR</strong>-<strong>24</strong> and activates the audio alarm and a flashing red light if the<br />
<strong>LR</strong>-<strong>24</strong> is turned on. Minimum detection voltage is 30 volts. This<br />
will occur whenever 30 volts is present in the water, regardless of<br />
whether the <strong>LR</strong>-<strong>24</strong> is turned on or not.<br />
Electronic Circuit Breaker<br />
The input of the <strong>LR</strong>-<strong>24</strong> is protected by an electronic circuit breaker<br />
which shuts off all power to the <strong>LR</strong>-<strong>24</strong> in the event of excessive<br />
battery drain. The breaker trips at an input current of 27 amps.<br />
Immersion Sensor<br />
Fig. 5.3<br />
Fig. 5.2<br />
Fig. 5.4<br />
www.smith-root.com<br />
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