Related Manuals for Garnet SEELEVEL PosiGround 672-H
Summary of Contents for Garnet SEELEVEL PosiGround 672-H
- Page 1 Truck Grounding Controller MODEL 672-H MANUAL garnetinstruments.com CANADA Garnet Instruments Garnet US Inc. 1-800-617-7384 286 Kaska Road 5360 Old Granbury Road Sherwood Park, AB T8A 4G7 Granbury, TX 76049...
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Page 2: Table Of Contents
GARNET Grounding Controller MODEL 672-H Table of Contents CHAPTER 1 - FEATURES AND OPERATION ............3 CHAPTER 2 - CLAMP PLACEMENT GUIDELINES ..........8 CHAPTER 3 - OPERATIONAL PROCEDURES ............16 CHAPTER 4 - PROGRAMMING INSTRUCTIONS..........18 CHAPTER 5 - INSTALLATION GUIDE ..............23 CHAPTER 6 - WIRING DIAGRAM ................ -
Page 3: Chapter 1 - Features And Operation
CHAPTER 1 - FEATURES AND OPERATION Congratulations on purchasing the Garnet Instruments Model 672-H SeeLeveL PosiGround Truck Grounding Control System. The 672-H represents the state of the art in truck mounted grounding control systems, and will enhance safety in the handling of flammable products by providing a positive indication of proper grounding. - Page 4 The PosiGround Controller is the “brains” of the system. It determines, displays, and transmits the operational status of the system and whether the ground clamps are properly connected. It also controls the warning alarm and final alarm outputs. The system is powered from 12V truck power, so there are no batteries to wear out or change.
- Page 5 In addition, the controller also has a serial port connector for RS-232 communications with a computer or PLC. The controller can be remotely monitored and configured via the serial port with an appropriate software application. The controller can be set for either a 250-ohm high resistance range or a 10-ohm low resistance range, depending on the application.
- Page 6 4. Short Circuit: If the controller determines that there is an electrical connection between the ground sense line and ground that does not go through the clamp module, indicating a short circuit between the grounding cables, it displays “ “ (SHort) on the left side of the bottom display.
- Page 7 PosiGround will indicate that the truck is ungrounded. See Chapter 2 on “Clamp Placement Guidelines”. GENERAL MECHANICAL ASSEMBLY *Note: Shutdown horn warning available. Hardware not included. TRUCK GROUNDING CONTROL SYSTEM GARNET MADE IN CANADA MODEL 672-H GROUND RESISTANCE (OHMS) OP: GROUND OPEN GO: GROUND GOOD SH: CABLES SHORTED...
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Page 8: Chapter 2 - Clamp Placement Guidelines
CHAPTER 2 - CLAMP PLACEMENT GUIDELINES Principle of grounding verification using the PosiGround: A major hazard in pumping liquids or granular solids is that an electrical charge can be built up on the truck due to the moving product being pumped. - Page 9 PosiGround Ground Clamp Operation: Good Situation #1 The distance between Clamp 1 and Clamp 2 is large enough to verify that there is good underground conductivity between 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.
- Page 10 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.
- Page 11 Good Situation #5 Do NOT drive a ground rod inside the berm 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.
- Page 12 Good Situation #7 Extremely Bad Situation #1 Never do this! This truck is not grounded! Page 12 672-H Manual...
- Page 13 Extremely Bad Situation #2 The truck is connected to the metal structure but the structure is not grounded. Extremely Bad Situation #3 672-H Manual Page 13...
- Page 14 Bad Situation #1 The local conductivity will show as a good ground but 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.
- Page 15 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. 672-H Manual Page 15...
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Page 16: Chapter 3 - Operational Procedures
CHAPTER 3 - OPERATIONAL PROCEDURES 1. When the operator is ready to begin handling, loading, or unloading flammable material, the truck must be grounded. 2. Connect one clamp to a metal object which looks like it should be grounded, and connect the other clamp to another metal object at least 20 feet away which also looks like it should be grounded. - Page 17 WARNING: The PosiGround is intended as an emergency backup system only, and is not intended as a substitute for operator diligence during the loading or unloading process. WARNING: It is the operator’s responsibility to properly connect the ground 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.
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Page 18: Chapter 4 - Programming Instructions
CHAPTER 4 - PROGRAMMING INSTRUCTIONS The PosiGround needs to have seven options programmed for any particular application. There are two buttons on the back of the display panel which are used to set the options. To program the time that the warning horn sounds before final alarm: 1. - Page 19 StEd 3. Press the SET button to change the mode between steady “ ” OSCL and oscillating ““ ”. 4. Press the SELECT button repeatedly to scroll through the remaining programming options. After the last option, the display will show donE “...
- Page 20 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 operation within a second. If at any time no button is pressed for 5 minutes, the system will return to normal operation.
- Page 21 To program the engagement sensor pullup: When the system is engaged, there will need to be some sort of signal to indicate this engagement. If the signal is just a switch connected to ground, with no light or any other connection to the switch, the pullup will need to be turned on in order to detect the switch.
- Page 22 To check the software 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 672H r1.09 SET button is held down, the display will show “ ”...
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Page 23: Chapter 5 - Installation Guide
3. If applicable to your installation, connect the pressure port of the pneumatic switch to the appropriate sensing point for loading control. Contact Garnet if you are unsure about how to sense when loading is activated. 4. If the truck does not have an existing ground cable and clamp, install one now. - Page 24 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).
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Page 25: Chapter 6 - Wiring Diagram
CHAPTER 6 - WIRING DIAGRAM SeeLeveL PosiGround 672-H WIRING DIAGRAM CLAMP MODULE FUSE CABLE REEL GND SENSE YELLOW ISOLATION PLATE PTO SENSE PURPLE FUSED PRESS SWITCH 12V POWER +12V RED GND BLACK WARN ALM HI WHT/ORG WARN ALM LO WHT/BLU... -
Page 26: Chapter 7 - Troubleshooting Guide
CHAPTER 7 - TROUBLESHOOTING GUIDE There are only 3 serviceable components in the PosiGround system: the controller, the clamp module, and the pneumatic switch. Each part can be tested independently. To test the pneumatic switch, disconnect the terminals and connect a continuity tester across the terminals. -
Page 27: Chapter 8 - Specifications
CHAPTER 8 - SPECIFICATIONS CONTROLLER Material Enclosure: cast aluminum enclosure Size 226 mm (8 ⅞”) wide, 143 mm (5 ⅝”) high, 92 mm (3 ⅝”) deep Display type Wide temperature LCDs, 4 digit, 7 segment with backlight Display size 12.7 mm (½”) high digits System power 12 V truck power required, current drain less requirements... -
Page 28: Chapter 9 - Service And Warranty Information
Alberta, T8A 4G7. Returned warranted items will be repaired or replaced at the discretion of Garnet Instruments. Any Garnet items under the Garnet Warranty Policy that are deemed irreparable by Garnet Instruments will be replaced at no charge or a credit will be issued for that item subject to the customer’s request.