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www.babbittinternational.com 

Reference Manual 

 

2021

 

 

 

18 

 

4.3 Time Delay 

 
       The purpose of the time delay is to allow the pump to prime itself or ignore voids in the process for a          

 

        preset period of time. The time delay is adjustable between 1/8 second to 2 hours. If no time delay is      

 

        required, turn the time adjustment pot completely CCW and set S1 down, S2 up. The potentiometer has                       

 

        20  turns and freewheels at the end of its travel without damage. You may hear “clicks” at the end of  

 

        travel. 
 

 

4.3 Setting the Time Delay 
 

     1)   Setting the timing mode, either on delay or off delay, is done by positioning S3 and S4 as shown in the 

chart below. 
 

NOTE: 

S3 and S4 also select fail safe high level (FSH) or fail safe low level (FSL). 

 

     2)   Select the timing range using S1 and S2 as shown on the chart below. 
     3)   Adjust the time adjustment potentiometer clockwise to increase time or CWW to decrease until the 
             exact time delay is reached. The test switch may be depressed to start the timing when checking timing 

sequence. 
 

NOTE: 

For long timing ranges you can set the timer for a shorter range, then 

change the range switches (S1 and S2) to increase the time. For example, the desired 
time delay is 15 minutes. This is equal to 900 seconds. By setting S1 down and S2 up 
and adjusting the timer to approximately 28 seconds, the ratio on this range is 1. To 
increase this range by 32, move S1 up and S2 up. 32x28 seconds equals approximately 
15 minutes. 
 

 

4.5 Fail Safe Selection 

 
     The failsafe feature provides a “false alarm” in case of power outage or major component failures. When 

                   properly selected, the failsafe feature can protect equipment or alert you of a unit failure. Fail Safe High 
 

      (FSH) means that the relay is energized when NO PRODUCT is touching the sensing element. The green 

 

      led indicates relay status and is on when the relay is energized. When product comes into contact with the 

 

      sensing element, the relay is de-energized. Fail Safe Low (FSL) means that the relay is energized when 

 

      PRODUCT IS touching the sensing element. 

 

 
                                   
            

 

                       

                    

NOTE:

 Due to the wide variety of applications and possible control or alarm functions, the proper fail   

 

safe selection will depend on your circumstances. Please call your distributor or the factory if 

 

you need assistance. 

 

 

Summary of Contents for LS8500

Page 1: ...LS8500 Presence Absence Switch OWNERS MANUAL INSTALLATION CALIBRATION TROUBLESHOOTING WARRANTY P O Box 70094 Houston TX 77270 713 467 4438 ...

Page 2: ...s arise during installation please contact Customer Service 1 800 835 8012 or 713 467 4438 8 00 a m to 5 00 p m CST US Failure to follow safe installation and servicing guidelines could result in death or serious injury Make sure only qualified personnel perform the installation Use the equipment only as specified in this manual Failure to do so may impair the protection provided by the equipment ...

Page 3: ...tial Ring Flange Location 8 3 3 2 Full Ring Flange Location 8 3 3 3 Full Faced Gaskets Flanges 8 3 4 Physical Installation 10 3 4 Grounding 10 3 5 Ground Continuity Test 10 3 6 Installing the Receiver 11 3 7 Typical Applications Wiring Diagrams 12 4 CALIBRATION 16 4 1 Sensitivity Calibration Conductive Materials 16 4 2 Sensitivity Calibration Non Conductive Materials 17 4 3 Time Delay 18 4 3 Setti...

Page 4: ...e receiver changes state when material is detected 1 2 Specifications Electrical Power 115 VAC 15 50 60 Hz 2 watts standard 12 VDC 24 VDC or 230 VAC optional Output 2 Form C contacts DPDT relay 5 amp resistive at 125 250 VAC 30 VDC Fuse On board 250 mA 125 volts Fail Safe Selectable high or low level Time Delay Selectable ON or OFF delay Adjustable 1 8 sec to 2 hours RF Frequency Approximately 1 3...

Page 5: ...ional com Reference Manual 2021 5 1 3 Ordering Information LS8500 115VAC FP 4 150 PR Model LS8500 Power Supply 115VAC 24VDC 12VDC 220VAC Sensor Type FP Flange Probe Sensor Size Flange Model PR Partial Ring or FR Full Ring ...

Page 6: ...www babbittinternational com Reference Manual 2021 6 1 4 GA Drawing Figure 1 1 1 5 Sensor Rings Figure 1 2 ...

Page 7: ...hed 2 A transmitter module in the explosion proof enclosure 3 The LS8000 R receiver card 4 A plastic snap track to mount the receiver card 3 2 Bench Test THIS IS AN EXCELLENT TIME TO TEST AND BECOME FAMILIAR WITH THE TIME DELAY IF IT IS TO BE USED IN YOUR APPLICATION See calibration instructions section 7 1 and 7 2 On the bench hook up the appropriate power to L1 and L2 The operating voltage of th...

Page 8: ...f problematic locations and preferred locations Areas to avoid include immediately before or after a 90 degree bend vertical or horizontal pipe In some cases these areas have created air pockets thus turning the pump off In other cases these areas have led to excess buildup leaving pumps to run when they should have been turned off 3 3 2 Full Ring Flange Location Full ring sensor flanges are prima...

Page 9: ...www babbittinternational com Reference Manual 2021 9 SENSOR FLANGE MOUNTING ...

Page 10: ...and water will stay outside the unit install an EYSM unilet before each LS8500 and fill with explosion proof sealing cement CAUTION Always take the necessary safety precautions when cutting or welding a Tag and lock out the electrical power to the equipment that services the vessels b Check liquid or dry powders that create a gas in the vessel for oxygen as well as the explosion factor All dust wi...

Page 11: ... be mounted in existing control panels or enclosures can be ordered from the factory 1 Attach the snap track to the panel back pan or other surface using 2 small screws or a suitable adhesive 2 Snap the LS8000 R same as LS8500 receiver card into the snap track 3 Connect shielded cable to the 3 terminals marked G S see page 13 for wiring diagram 4 Connect the proper supply voltage and relay output ...

Page 12: ...R RECEIVER IS INTENDED FOR ONLY SUPPLY VOLTAGE THIS VOLTAGE IS PRINTED ON THE POWER SUPPLY BOARD FOR 115VAC OR 230VAC UNITS HOOK UP THE HOT LEAD TO L1 AND THE NEUTRAL TO L2 WITH APPROPRIATE GROUND FOR 12 VDC OR 24 VDC UNITS HOOK THE POSITIVE VOLTAGE TO L1 AND THE COMMON OR GROUND TO L2 NOTE LS8000 AND LS8500 ELECTRONIC COMPONENTS ARE INTERCHANGABLE ...

Page 13: ...www babbittinternational com Reference Manual 2021 13 ...

Page 14: ...www babbittinternational com Reference Manual 2021 14 ...

Page 15: ...www babbittinternational com Reference Manual 2021 15 ...

Page 16: ...w babbittinternational com Reference Manual 2021 16 4 CALIBRATION 4 1 Sensitivity Calibration Conductive Materials NOTE The green LED indicates relay status The relay is energized when the green LED is on ...

Page 17: ...www babbittinternational com Reference Manual 2021 17 4 2 Sensitivity Calibration Non Conductive Materials NOTE The green LED indicates relay status The relay is energized when the green LED is on ...

Page 18: ... timing ranges you can set the timer for a shorter range then change the range switches S1 and S2 to increase the time For example the desired time delay is 15 minutes This is equal to 900 seconds By setting S1 down and S2 up and adjusting the timer to approximately 28 seconds the ratio on this range is 1 To increase this range by 32 move S1 up and S2 up 32x28 seconds equals approximately 15 minut...

Page 19: ...t so that the bare end is not touching anything Turn calibration Pot 20 turns CCW LED should go out If it does repair replace or clean flange If LED does not go out replace electronics Check shielded cable for proper connection Check shielded cable for shorts or open circuits Unit triggers when material Improper mounting of flange Contact factory or distributor touches sensing element Improper cal...

Page 20: ...r workmanship All claims must be made in writing within the warranty period No claims outside of the warranty period will be honored Warranties are not applied to any components which have been damaged by improper installation use exposure to unusual atmospheric conditions or components which have been misused abused damaged by neglect or accident This warranty shall not apply to any components wh...

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