USER`S MANUAL - Smith-Root
Contents
1. 41 www smith root com Fuse 1 Fuse 2 yueg punoig uaan _ INQ apouy njg INPUT POWER BLOCK DIN Block Plug Socket Green DIN Socket A Green wire Earth ground Blue DIN Socket B White wire Neutral power Gray DIN Socket C Black wire 240 VAC power Not used Socket D Red wire 240 VAC power CONTROL SWITCH PLUG DIN Block Plug Socket Connection to a single switch on external MS connector Gray DIN Pin A Switch connection 1 Blue DIN Pin D Switch connection 2 PIN OUTS FOR DIN RAIL CONNECTIONS All cabling is routed through electrical conduit and enters the EA 1000B box at the bottom through the provided knock outs Each circuit is connected at DIN rail terminals to assure proper mating Hote a 2 YIUMS 1004 an g YDUMS UO HISOd Jeyseg Aes5 t ME t keD 10 eDuUNuUJ 27J0W Y a ANODE CATHODE BLOCK DIN Block Plug Socket Gray DIN Pin A White wire Tank anode Blue DIN Pin B Black wire Tank cathode Green DIN Pin C Green wire frame ground Alternate connection to two switches to operate in series on external MS connector Blue DIN Pin A Switch 1 connection 1 Blue DIN Pin B Switch 1 connection 2 Gray DIN Pin C Switch 2 connection 1 Gray DIN Pin D Switch 2 connection 2 2013 12 EA 1000B ELECTROANESTHESIA UNIT SPECIFICATIONS Input Voltage Fuse2. Output Voltage Output Current Output Waveform Output Duration Output Polartity Dimensions Weight Operating Temperature Range Storage Temperature Range 120 to 240 VAC 60 Hz single phase 10 Amps 250V 10A Slow Blow Bussman 10A or Littlefuse 32610 Stage 1 3 to 48 volts in 3 volt steps Stage 2 50 to 290 volts in 16 volt steps 3 Amps maximum Burst of 3 rectangular pulses 2 08 milliseconds wide 10 duty cycle repeated at 15 Hz rate O to 256 seconds set with Stage 1 and Stage 2 time switches Normal or reverse user selectable 17 W X 10 1 2 D X 19 5 8 H 43 18 cm W X 26 67 cm D X 49 8 cm H 29 1 4 Lbs 13 26 Kg 352 to 104 F O to 40 C O to 150 F 18 to 65 C USER S MANUAL APPENDIX SMITH ROOT MODEL EA 1000A B ELECTROANESTHESIA SYSTEM STANDARD OPERATING PROCEDURES IMPORTANT NOTE This technology must not be used without first receiving hands on training in safety and operating procedures from qualified trained technicians INTRODUCTION The EA 1000A B induces fish sedation in two sequential stages a low voltage phase Stage 1 followed by a high voltage electronarcosis phase Stage 2 Salmonids should never be exposed to high voltage without a prior low voltage exposure unless euthanasia is desired The low voltage stage promotes rapid movement and physically prepares fish neurotransmission physiology for the high voltage stage that follows thus avoiding viol
3. and Output Power OK indicator light the timer starts and the lower Stage 1 voltage and waveform is applied to the electrodes for the time selected by the Stage 1 Time control 8 Note that the Pulse On indicator flashes 9 When the Stage 1 indicator goes out the Stage 2 indicator will light and the higher Stage 2 voltage and waveform is applied to the electrodes for the time selected by the Stage 2 Time control 10 Note at the end of the cycle the Output On Stage 2 and Pulse On indicators go out the enunciator becomes silent and the timer display shows O seconds remaining in the treatment cycle 11 Release the safety switch 12 Raise the brail basket and process the fish 15 Lower the brail basket and repeat the procedure until all the fish have been processed 3 www smith root com 2013 4 EA 1000B ELECTROANESTHESIA UNIT ADJUSTING THE SETTINGS f the fish are not sufficiently anesthetized increase the time of treatment When increasing the settings on the EA Unit we recommend incrementally increasing the amount of time per treatment prior to increasing voltage This will result in reduced injury to the fish Hemorrhaging in the muscle tissue along the spine of the fish can occur in addition to vertebral damage This usually indicates the voltage setting of one or both stages is too high These injuries can be greatly reduced by using proper EA settings voltage time or a combination of both When set
4. A 1000B MAKE SURE THAT THE LID IS CLOSED DURING WARNING UNIT IS NOT WATERPROOF TO PREVENT WATER DAMAGE OPERATION AND WHILE CLEANING WORK AREA OPERATING INSTRUCTIONS Do not install the EA IOOOB in an area where it will be directly exposed to the weather Do not install the EA 1000B in an area where it will be exposed to condensation Always make sure the EA 1000B is connected to a properly grounded power source Before using the EA 1000B for the day inspect all the input and output cables for damage and repair or replace any damaged cables immediately Make sure all connections to the unit and the treatment tanks are tight Te Do not operate the unit if any of the output indicators are not functioning correctly If it becomes necessary to replace a fuse the lamp in the fuse holder cap will light When replacing fuses use only fuses of the same type and size as the original 250V 10 Amp Slow Blow When the EA 1000B is correctly adjusted A WARNING The waterand the fish in the treatment tanks will first be the electrodes in the holding tanks excited during Stage 1 and then anesthetized carry electrical current capable of during stage 2 Some experimentation may inflicting SEVERE INJURY OR be required to find the optimum settings of DEATH when the Electroanesthesia the controls Things to take into consideration Ups eoa e ecm i would include but are not limited to water i conductivity temperature power density pers
5. Carefully remove abrasive substances before wiping the unit The unit can be cleaned with a mild soap and water solution and a soft cloth Do not wash down with a hose Before using the EA 1000B for the day inspect all the input and output cables for damage and repair or replace any damaged cables immediately When the EA 1000B is used seasonally we recommend the unit be stored inside when it is not being used It should be kept in an area where it will not be exposed 7 VOLTAGE ROTARY SWITCHES Sets the voltage of the output on stages 1 amp 2 8 AC FUSES Two 2 10 amps ea Fuse holder cap lights up when fuse is blown 9 POWER SWITCH Turns power to the EA 1000B on and off to condensation Remove foot switch connector and use provided cap to protect 10 POLARITY SWITCH Reverses the internal connection to the Anode connector Cathode receptacle to enable switching the polarity of the electrodes in To maintain safety fuses must be replaced with the same size and type as the the holding tank original 11 FOOT SWITCH CONNECTOR Allows for the connection of a single foot switch controller Additional configurations can be connected via the DIN WARNING UNIT IS NOT WATERPROOF TO PREVENT WATER terminal strip inside the unit behind the control panel N DAMAGE TO THE EA 1000B MAKE SURE THAT THE LID IS CLOSED DURING OPERATION AND WHILE CLEANING WORK AREA 7 www smith root com 2013 2 EA 1000B ELECTROANESTHESIA UN
6. IT SAFETY CHECKLIST Before operating unit make sure that e At least 2 people on the crew know how to administer first aid for electric shock e Unit is clean and dry close lid during use e All cables are in good condition with no cracks or abrasions and that all termineal connections are in place with no missing or damaged parts e Safety control switches are in good condition and functioning properly e Indicators and alarms are functioning properly e All personal protective equipment is in good condition e All electrical connections in the system are clean and tight e Electrodes are clean and in good condition with no loose or damaged parts e Treatment tanks clean and in good condition with no leaks or damaged areas e Fish handling system is clean and in good condition with no worn or damaged parts e Power outlet is in good condition and is properly wired e Work area Is clear with no trip hazards e Floor has a non slip surface e All crew members know where the nearest phone is and the emergency services number is clearly posted by the phone 9 www smith root com GLOSSARY OF TERMS AC AMMETER AMPS ANESTHESIA ANODE BRAIL BASKET CATHODE CIRCUIT DIRECT CURRENT ELECTROANESTHESIA ELECTRODE ENUNCIATOR FUSE HEMORRHAGING HERTZ LED PEAK VOLTAGE POLARITY POLARITY REVERSAL POWER SOURCE PULSATOR RATED OR RATING SINGLE PHASE VOLTMETER VOL
7. ORMATION Please consult Smith Root 360 573 0202 if further guidance is needed or if you are having any issues in achieving safe successful fish sedation 13 www smith root com 2013 14
8. TS WAVEFORM USER S MANUAL Alternating current is a common form of electricity in which the polarity of the electrical signal reverses over time A device used to measure the amount of electricity flowing in a circuit The unit of measure for the amount of electricity flowing ina circuit also called electrical Current A general loss of senses such as pain touch temperature etc The positive lead or electrode of a direct current DC power source A basket made of wire screen or other perforated material The negative lead or electrode of a direct current DC power source Any combination of power sources wires electrodes or other electrically conductive media through which electrical current flows An electrical source the value of which does not vary over time Using electricity to induce an anesthetized state A device used to apply electricity to a different media or organism An audible or visual indicator or alarm An electrical safety device designed to burn out in a safe manner if more than the rated current flows in the protected circuit Bleeding Abbreviated Hz The unit of measure of electrical frequency Also known as cycles per second or pulses per second Light Emitting Diode A solid state electronic device often used as a visual indicator The maximum voltage that an electrical signal or waveform attains Having both positive and negative terminals or connections Having th
9. USER S MANUAL EA 1000B6 ELECTROANESTHESIA UNIT OPERATION AND MAINTENANCE MANUAL CONTENTS SYSTEM DESCRIPTION sisisi 1 OPERATING INSTRUCTIONS ie eeeteeeeeeeeeeeeeeeees 3 Se UP sspntnconsasnpunpunsanenccanncandnataieecayssesennanssvaneacesenxanesker 4 ADJUSTING SETTINGS osorioi 5 CONTROLS amp INDICATORS cece ceccteeeeeeeeeeeeeeneeees 6 FRONT PANEL CONTROLS 1 cctecceceeeeeeeeeeeeeeeeeees 7 WIRING MAINTENANCE 0ccccccssceessseessseeeeeees 8 SAFET CHECKLIST anaa 9 GLOSSARY OF TERMS sisca konia 10 ERROR CONDITION Seisis 11 PIN OUTS FOR CONNECTORS ie cecceeteeeeeeeeeeees 12 SPECIFICATION S sisone 13 APPEND IX coran 14 Items manufactured by companies other than Smith Root carry the original manufacturer s warranty Please contact product manufacturer for return instructions All Smith Root Inc manufactured products are covered by a one year warranty Due to increased handling costs a minimum order amount of 25 00 is required Prices are subject to change without notice SRI reserves the right to make changes of products at anytime without notice Smith Root Inc Electrical Field Fish Barrier systems are protected by patent Ideas arrangements drawings and specifications are the sole property of Smith Root Inc and are intended for this specific catalog and shall not be used for any other purpose without written consent of Smith Root Inc USS 4 750 451 Canada 1 304 442 Credit
10. amp Refund Policy Customers returning equipment in new condition will be given credit to the applicable VISA Master Card account within five days from the date of the return A return authorization must accompany returns Valid equipment returns include but are not limited to ordering incorrect equipment funding deficits and defective equipment returned for reimbursement All returns are subject to a restocking fee and applicable shipping charges The restocking fee is figured at 10 of the purchase price but not less than 20 00 Customers receiving equipment in damaged condition will be referred to the shipping company for insurance reimbursement Rev 005 2013 Smith Root Inc Vancouver WA USA e Rev 05 Control 08117 05 2013 EA 1000B ELECTROANESTHESIA UNIT WARNING HIGH VOLTAGE IS USED IN THE OPERATION OF THIS EQUIPMENT DEATH ON CONTACT MAY RESULT IF PERSONNEL FAIL TO OBSERVE SAFETY PRECAUTIONS BE CAREFUL TO AVOID CONTACT WITH ALL CIRCUIT COMPONENTS AND CONNECTIONS WHILE CHECKING OR SERVICING THIS EQUIPMENT SYSTEM DESCRIPTION CONTROL UNIT G ANESTHESIA TANK The EA 1000B Electroanesthesia Uniti a high voltage Direct Current DC pulsator that puts out a complex waveform capable of anesthetizing fish placed in the treatment tank The varying electric field first excites the fish then puts them into an anesthetized state The electrical output of the EA unit is engineered to induce the
11. e ability to exchange positive and negative terminals or connections A source of electricity A machine that generates pulses of electricity The amount of electrical voltage current or power that a circuit or device can safely handle An electrical signal having only one pattern that repeats over time A device used to measure the amount of electrical pressure in a circuit The unit of measure of electrical pressure A pattern of electrical output that repeats over time 2013 10 EA 1000B EA 1000B ERROR CONDITIONS Error conditions shown on the front panel LED s only appear as long as the control switch in pressed OUTPUT CURRENT PEAK AMPS STAGE 1 STAGE 2 OUTPUT PULSE OUTPUT a POWER TIME SECONDS STAGE 1 LED FLASHING Indicates the control switch was pressed when the power switch was turned on E OUTPUT CURRENT PEAK AMPS STAGE 1 STAGE 2 L OUTPUT PULSE 0 INPUT OUTPUT 0 00 POWER POWER TIME SECONDS STAGE 1 INPUT POWER OK LED FLASHING Indicates a problem with the AC power to the unit OUTPUT CURRENT PEAK AMPS STAGE 1 STAGE 2 OUTPUT PULSE OUTPUT POWER TIME E SECONDS STAGE 1 OUTPUT POWER OK LED FLASHING Indicates an output power overload OUTPUT CURRENT PEAK AMPS STAGE 1 STAGE 2 OUTPUT PULSE OUTPUT POWER TIME SECONDS STAGE 1 PULSE ON LED FLASHING Indicates an output peak current overload
12. ent muscle contractions that can induce stress or cause injury OPERATIONAL PROCEDURES The Model 1000A B EA System uses a 5 second delay from foot switch initiation before electricity is applied to fish The foot switch Cwhich helos ensure crew safety must be applied throughout the entire Stage 1 and Stage 2 cycles Premature release of the foot pedal will instantly terminate exposure and reset the timer and control circuitry thus it is important not to interrupt the cycle unless an unsafe operating condition warrants doing so Never adjust settings while the foot switch is engaged or damage to the EA unit can result Once initial setup has been completed and successfully trialed on a cross section of test fish please see below the settings should be recorded and posted onsite Each day prior to exposing fish to the electrosedation field the operator must confirm that the desired EA1000A B settings have been selected and not inadvertently altered Water conductivity temperature and fish species are among the variables that may require adjustments to settings It is therefore recommended that such parameters be monitored on a regular basis If dark bands called branding appear on multiple fish this may be an indication that fish are being injured Cand that downward adjustments must be made to settings SUGGESTED OPERATIONAL SETTINGS For initial set up only two to three fish should be used at atime The determination of optimum
13. ghts 5 Adjust the Voltage and Time Sec switches for each of the two stages to anesthetize the fish quickly and deeply with the minimum power applied Any adjustments made while the output is on will not take affect until the safety switch is released and pressed again Note that currently the Waveform Switches select the same output waveform in all positions These switches have been provided to allow for the possibility of using different waveforms in the future based on continuing research into their effectiveness Until you have gained more experience with the EA 1OOOB start with the settings shown below Vots seconds _ volts Seconds _ jstage2 190 ea 6 Press the safety switch or switches Note that the enunciator sounds for 5 seconds before the Output On and Output Power OK indicators light Also note the timer is reset to the combined time of Stage 1 and Stage 2 The timer does not start until the output becomes active after the 5 second safety delay The safety switches must be oressed throughout the output cycle If any of the safety switches are released the output cycle is immediately terminated and the control circuitry is reset The timer will display the time remaining from the previous treatment cycle until the safety switches are again pressed When the safety switches are pressed again a new output cycle will start and the timer display will be reset 7 After the 5 second turn on delay the Stage 1 indicator
14. grammed to show the number of seconds a treatment cycle has been running AUDIO ALARM Sounds 5 seconds before the Output is activated and continues until the treatment cycle ends 2013 6 EA 1000B USER S MANUAL ELECTROANESTHESIA UNIT FRONT PANEL CONTROLS WIRING THE CONTROL UNIT The input and output power connections as well as control and external signal 1 ENUNCIATOR Sounds when unit rr connections are on DIN rail connectors accessible behind the front panel See IS active diagram below for wiring and pin out details and descriptions on page 12 for further 2 TIME ROTARY SWITCHES Sets information the duration of the output on stages 1 amp 2 re use 3 WAVEFORM ROTARY SWITCHES Fuse 2 Inactive at this time This feature is N currently under developement 4 OUTPUT CURRENT METER E H Indicates the amount of electrical sls current flowing through the E E c cathode circuits 17 TTT 5 STATUS LEDS O S e Stage 1 Lights when Stage 1is on Y T T WG G G GW ue G e Output Lights when Output is TE 23h e T active for Stage 1 or Stage 2 JE On 3 na e Power Lights when power is on Se S 3 ER d D a e Stage 2 Lights when Stage 2 is Sa Oma 3 a 2 on a D 9 O O 2 p e Output Power Lights when 5 zi Output is active e Pulse Flashes when Output is MAINTENANCE 6 TIME METER Shows duration of treatment cycle in Qi The EA 1000B requires little maintenance other than keeping the unit clean seconds
15. l perform 1 complete treatment cycle If the switch is released during the cycle the output is switched off and the control circuitry reset Ina normal treatment cycle the lower voltage Stage 1 output is turned on aftera 5 second warning delay At the end of Stage 1 the higher voltage Stage 2 begins automatically At the end of Stage 2 the output is automatically switched off until the remote control safety switch is released and pressed again If the time for either Stage 1 or Stage 2 is set to O that stage is skipped in the treatment cycle OUTPUT POWER Indicator lights when the output is active OUTPUT Indicator lights when the output is active STAGE 1 Indicator lights during Stage 1 of the output STAGE 2 Indicator lights during Stage 2 of the output PULSE Indicator flashes when output pulses are being applied to the electrodes OUTPUT CURRENT Meter indicates the amount of electrical current flowing through the electrodes STAGE 1 amp 2 TIME SEC ROTARY SWITCHES Sets the duration of the output stage at 8 16 24 32 40 48 56 64 72 80 88 96 104 112 128 seconds If O is selected the stage is not performed STAGE 1 amp 2 VOLTAGE Sets the output voltage for the Stage Stage 1 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 Stage 2 50 66 82 98 114 130 146 162 178 194 210 226 242 258 274 290 TIME By default shows the number of seconds remaining in a treatment cycle The timer can be pro
16. mildest possible physiological reaction of the fish The controls should be adjusted to anesthetize the fish quickly and deeply with the minimum power applied The electrical output waveform is applied in two successive stages each having selectable peak voltage waveform and duration Stage 1 is a lower voltage applied as a preparatory measure for the higher voltage applied in Stage 2 The output is applied to electrodes mounted in a pair of plastic holding tanks with one electrode mounted in the common wall between the tanks normally the anode or positive electrode and the others normally the cathode or negative electrodes mounted in the opposite wall of each tank and tied together electrically The output is electrically isolated from the grounded input power circuit to reduce the hazard of shock to personnel who might come into contact with the output circuit A brail basket raises anesthetized fish from the tanks to a workstation USER S MANUAL nput power required is 120 VAC to 240 VAC 60 Hz single phase at 15 amps The input power fuses are housed in indicating fuse holders mounted on the front panel The polarity of the electrical output supplied by the EA unit can be switched at the front panel in order to counteract the electrical generation of deposits on the electrodes in the tank over time The output is switched on and off by a low voltage remote control switch Either a single or dual footswitch assembly can be connected
17. onnel clear of the holding tanks fish size species life history stages and the and all water in contact with them physical condition of the fish For example when the Electroanesthesia Unit iS salmonids with extended time in fresh operating Ensure that at least two water will require adjustments of settings people on site are trained in both voltage and time Fish behavior and emergency first aid procedures for the condition of fish flesh for consumption treatment of electrical shock purposes will also be a concern This unit is not designed to electrocute the fish but rather anesthetize them to the point of non recovery or close to it dependent on your needs We have found that to be effective the fish must first be subjected to a low voltage treatment forcing the fish to be very active for a period of time and then exposed to a high voltage that forces the fish to stop respiration for a period of time The goal is to achieve the targeted fish behavior without creating unnecessary Injury to the fish at any point USER S MANUAL SET UP 1 The Power switch must be in the Off position handle down 2 Check the area to be sure all personnel are in their correct positions and the safety switches are not depressed 3 Ensure that fish are in the the brail basket which is submerged in the electroanesthesia tanks 4 Turn the Power switch to the On position handle up Note that after a short time the Input Power Ok indicator li
18. settings may require several tests Stage 1 voltage should be just high enough to make the fish move excitedly In the Pacific Northwest where conductivities are moderately low lt 100 mS cm voltage for Stage 1is commonly set in the range of 18 30 V for 24 to 48 seconds Stage 2 voltage in the Pacific Northwest is commonly set in the range of 114 194 V for 32 to 68 seconds Stage 2 voltages have the potential to injure fish so operator care is necessary Facilities with low conductivity water lt 30 mS cm may need to add salt to the treatment tank water so that sedation can be achieved at moderate voltages The operator should always start at the lowest voltage and exposure times mentioned above If sedation is not initially achieved after both stages are administered Stage 1 exposure time should be increased in up to 8 second increments If sedation is still not achieved Stage 2 exposure time should be increased by 8 s increments up to 60 s If sedation is still not attained Stage 2 voltage should be increased by 16 V increments and re assessed until sedation is achieved Stage 2 voltage will likely be less than or equal to 194 V The operator may want to try slightly higher voltages and reduced exposure times all the while examining fish for branding marks Detailed notes and record keeping will orove to be valuable allies in achieving successful fish sedation with the Smith Root Model EA 1000A B System and in reporting results CONTACT INF
19. ting up the unit we recommend checking for both injuries and recovery time of the treated fish When the EA 1000B is adjusted correctly the injury rate should be very low and the recovery time should be less than 10 minutes for all fish In general decreasing stage 2 voltage or increasing stage 1 time will result in lower injury rate Decreasing stage 2 time usually leads to shorter recovery times Remember desired fish resoonse and condition must always be taken into consideration There are not any magic settings that work all the time for every application If the injury rate is too high then either decrease the stage 2 voltage or increase the stage 1 time Keep in mind that the duration of stage 1 can have a dramatic affect on injury rates Injury rates tend to increase with stage 1 times less than 20 seconds This is because the fish have not tired sufficiently before the higher stage 2 voltage is applied If the fish are over anesthetized decrease the duration of treatment usually the stage 2 time If the fish do not quickly calm down after stage 2 has begun increase the stage 1 time If the fish continue to take more than 5 seconds to calm down after the beginning of stage 2 then increase the stage 2 voltage but take care to watch for an increase in injuries to the treated fish Remember that changes to the settings of the EA 1000B do not take affect until the next time the safety control switch is pressed Releasing and pressing the s
20. to the receptacle on the EA unit PROCEDURE AT A TYPICAL ELECTROANESTHESIA INSTALLATION o Q SORTING TABLE CROWDER N z gt ELEVATOR ELECTRO J ANESTHESIA TANK Fish are herded through crowder and into the Elevator Elevator lifts fish above electroanesthesia tank and drops them in Fish undergo Electroanesthesia cycle for Anesthetized fish are lifted out of Electroanesthesia predetermined time tank and lifted to sorting table There are front panel LED s to indicate Input Power Ok Output Power Ok Stage 1 On Output On Pulse On and Stage 2 On There is also a front panel ammeter and a timer display The timer can be set to count up or down in seconds counting down is the default mode By default the timer display shows the number of seconds remaining in a treatment cycle A treatment cycle is the combined time of Stage 1 and Stage 2 At the end of the treatment cycle the output is automatically turned off In addition a front panel audio enunciator sounds when the output is active A remote alarm is connected to the EA 1000B via the Remote Enunciator terminal block behind the front panel It is used to warn personnel in the area when the output of the unit is active The remote alarm must be AC powered and rated at 240 volts or less and 5 amps or less 4 www smith root com 2013 2 EA 1000B ELECTROANESTHESIA UNIT TO THE E
21. witch again not only changes the settings the machine uses but also resets the treatment time to the full duration of the stage 1 and stage 2 times We do not recommend making changes during a treatment cycle Rather wait until the cycle has ended then make changes There should always be quality control throughout the duration of time when fish are returning and being held at the hatchery Cvia filleting of random fish to ensure the injury rate is low and the quality of the flesh is still acceptable for its intended use amp www smith root com USER S MANUAL CONTROLS AND INDICATORS POWER ON OFF Turns power to the EA 1000B on and Off INPUT POWER OK Indicator lights when the input power is switched on at the front panel and the internal circuitry is ready POLARITY SWITCH Reverses the internal connection to the Anode Cathode receptacle to enable switching the polarity of the electrodes in the holding tank Setting the switch to Normal connects the positive side of the output to the anode cable and the negative side to the cathode cable Periodically reversing the polarity of the electrodes in the tanks helps to prevent the buildup of deposits on the electrodes WARNINGI Do not change the setting of this switch when the output of the EA 1000B is active Doing so may damage the switch and can cause severe Injury to any fish in the tanks CONTROL SWITCH When the remote control safety switch is pressed and held the EA wil
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