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Garnet SEELEVEL PosiGround 672-H, Manual, Page: 10 / 29

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Garnet SEELEVEL PosiGround 672-H Manual Download Page 10

Page 10

672-H Manual

Good Situation #3

Good Situation #4

If pumping from a metal tank, verifying connection to the tank is sufficient. 

In this case, the clamps must be on two separate fittings, pipes, or brackets 

to ensure that the signal has to travel from one clamp through the tank 
wall to the other clamp.

Summary of Contents for SEELEVEL PosiGround 672-H

Page 1: ...netinstruments com 1 800 617 7384 CANADA Garnet Instruments 286 Kaska Road Sherwood Park AB T8A 4G7 USA Garnet US Inc 5360 Old Granbury Road Granbury TX 76049 Truck Grounding Controller MODEL 672 H MANUAL ...

Page 2: ...TIONS 27 CHAPTER 9 SERVICE AND WARRANTY INFORMATION 28 GARNET Grounding Controller MODEL 672 H 672 H Manual_v1 0 18 Jul 2022 W CAUTION explains safety information that could cause damage to the product including data loss W WARNING explains dangers that might result in personal injury or death W NOTE expands on information for any procedures SAFETY SYMBOLS INFORMATION Notes Cautions and Warnings h...

Page 3: ...viding a positive indication of proper grounding The SeeLeveL PosiGround system consists of four main components the controller mounted either inside or outside the cab of the truck the PTO engagement or loading sensing switch the grounding fault warning horn and the ground connectors which consists of the clamp module a pair of ground cables and a pair of ground clamps Grounding reel with clamp G...

Page 4: ...device The power side of the device must be connected to 12V truck power Warning alarm high output this provides 12V power and is connected to the 12V power side of the warning device The ground side of the device must be connected to ground This output is not provided at this time Final alarm low output this provides ground and is connected to the ground side of the device The power side of the d...

Page 5: ...h the controller designating any resistance less than 10 0 ohms to be a good ground and any resistance greater than 10 0 ohms to be an open circuit If the resistance is greater than 99 9 ohms the top display will show 99 9 and if the resistance is less than 1 0 ohms it will show u1 0 The bottom display shows one of these six conditions for the ground and PTO status 1 Loading Disengaged If the cont...

Page 6: ...sense line and ground but that it is backwards indicating that the clamp module is reversed or in the ground line it displays rE Reversed on the bottom display The top display will be blank If loading is engaged the warning alarm will activate for a set time and after that the final alarm will activate 6 Good Ground Connection If the controller determines that the ground resistance is less than ei...

Page 7: ... which also looks like it should be grounded If they are both grounded then there will be an electrical connection between them which the PosiGround will detect If one or both of the objects is not grounded then there should not be any connection between them so the PosiGround will indicate that the truck is ungrounded See Chapter 2 on Clamp Placement Guidelines OP GROUND OPEN GO GROUND GOOD SH CA...

Page 8: ...wo clamps so that the PosiGround can give accurate results When properly used the PosiGround is very effective at verifying ground much more so than relying on a visual inspection of a single ground cable In order to verify that the truck is grounded the PosiGround clamps must be connected so that the PosiGround signal is forced to travel through the ground to get from one clamp to the other Alter...

Page 9: ...een the ground rod and the material being pumped This ensures that there cannot be a significant voltage created on the truck by the moving pumped material An excessive voltage on the truck can result in a spark between the truck and ground which could ignite a fire or explosion The conductivity drains off the voltage being developed on the truck by the moving material Good Situation 2 ...

Page 10: ...on 4 If pumping from a metal tank verifying connection to the tank is sufficient In this case the clamps must be on two separate fittings pipes or brackets to ensure that the signal has to travel from one clamp through the tank wall to the other clamp ...

Page 11: ...rm unless it is verified that the containment area does NOT have a liner Good Situation 6 Use a provided ground spot typically labelled as such and another metal spot close by This verifies that the clamp has contacted the ground spot DO NOT allow the clamps to touch each other ...

Page 12: ...Page 12 672 H Manual Good Situation 7 Extremely Bad Situation 1 This truck is not grounded Never do this ...

Page 13: ...Page 13 672 H Manual The truck is connected to the metal structure but the structure is not grounded Extremely Bad Situation 2 Extremely Bad Situation 3 ...

Page 14: ... there is actually poor ground between the rods and the material being pumped Bad Situation 2 The clamps are connected to the pipes but the pipes may be insulated coated from the ground through the ground The PosiGround signal is not forced to go as it should be to verify ground conductivity ...

Page 15: ...Page 15 672 H Manual Bad Situation 3 This verifies that the clamps are connected to the pipe but if the pipe is insulated or coated it may not be grounded ...

Page 16: ...will activate unless the ground connection is made within the set time period 5 If the ground connection is lost during loading the warning horn will sound for a set time and the final alarm will activate unless the ground connection is remade within the set time period 6 When loading is complete shut down the loading system and then disconnect the grounds 7 If the ground has been lost and the war...

Page 17: ...d cables to ensure correct PosiGround operation Simply hooking the ground clamps together and laying them on the ground does NOT constitute a proper ground connection W WARNING Do NOT travel with the ground clamps hooked together or with the ground sense clamp connected to the truck frame This may result in the operator forgetting to properly connect the ground clamps since no warning will be give...

Page 18: ...the remaining programming options After the last option the display will show donE while the button is held down When the button is released the system will return to normal operation within a second If at any time no button is pressed for 5 minutes the system will return to normal operation If you wish to remain in the programming mode press the SET button while still holding down the SELECT butt...

Page 19: ...T button again until the top display shows Horn and the bottom display shows On or Off 3 Press the SET button to change the mode between staying on On and turning off OFF 4 Press the SELECT button repeatedly to scroll through the remaining programming options After the last option the display will show donE while the button is held down When the button is released the system will return to normal ...

Page 20: ...n The low range is used when grounding to metal structures that are in turn properly grounded these are commonly provided at loading facilities In this case specifications normally call for metal to metal resistance to be less than 10 ohms The PosiGround uses this value It is up to the operator and or equipment installer to determine which range is appropriate for the application 1 Hold down the S...

Page 21: ...CT button when the display shows donE This returns you to the first programming menu item To program the engagement sensor polarity When the system is engaged there will need to be some sort of signal to indicate this engagement If the signal is a ground to indicate engagement then the polarity will need to be set to ground If the signal is 12 volts to indicate engagement then the polarity will ne...

Page 22: ...version To verify which revision of software the system is running press the SET button during normal not programming operation For as long as the SET button is held down the display will show 672H and r1 09 for example indicating revision 1 09 ...

Page 23: ...lamp install one now Mount a second cable and clamp for the ground sense line In order for the first grounding reel to function correctly it must be mounted to a clean conductive surface using the four mounting holes provided in the reel s base The second grounding reel for the ground sense line must be isolated which can be achieved with an isolation plate and shoulder washers supplied See wiring...

Page 24: ...starting in the event of a failure of the PosiGround system This switch should be located in a spot where it cannot be accidentally flipped Be sure to install a label showing the switch position this label is available from Garnet if needed 13 Test the system for proper operation see section B for operational procedures If the loading system is shut down and the clamps are not connected the PosiGr...

Page 25: ... BLU FINAL ALM HI GREY FINAL ALM LO GRN YEL WARNING HORN OR LIGHT CABLE REEL CABLE REEL CLAMP MODULE FOR WARNING AND FINAL ALARMS USE EITHER THE HI OR LO CONNECTION NOT BOTH ISOLATION PLATE MAIN CONNECTOR USE EITHER CONNECTION NOT BOTH 10A FUSE SeeLeveL PosiGround 672 H WIRING DIAGRAM FUSED 12V POWER GND BLACK SER TX WHT PUR SER RX WHT YEL TO PLC OR COMPUTER ...

Page 26: ...er yellow CM black to controller black The display should read 6O E and the final alarm light should be on and the warning horn or light should be off Note that it may take 1 to 2 seconds for the display to respond Shorting the ground sense and ground wires together should show SH E and the final alarm light should stay on and the warning horn or light should flash for a set time and then both lig...

Page 27: ... requirements 12 V truck power required current drain less that 20 mA not including alarm outputs Accuracy Ground resistance measurement accuracy is 2 at the switching point 10 ohms or 250 ohms Accuracy is 5 at measurement extremes Ambient temperature range 40 C to 60 C 40 F to 140 F Alarm output ratings Both alarm outputs can provide at least 2 amps to the load Maximum voltage is 16 V Outputs are...

Page 28: ...ARRANTIES These warranties are the only warranties expressed or implied upon which products are sold by Garnet and Garnet makes no warranty of merchantability or fitness for any particular purpose in respect to the products sold Garnet products or parts thereof assumed to be defective by the purchaser within the stipulated warranty period should be returned to the seller local distributor or direc...

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