Operation; Description Of Function - Stahl 8485 Betriebsanleitung

Operation

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8 Operation
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8.1 Operation
 For device operation, observe the information in the "Intended Use" and
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"Parameterisation and Commissioning" chapters.
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If tank containers are used, pay attention to rubber buffers which may isolate the tank
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from the frame.
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The grounding monitoring device is set at the factory so that it works without additional
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configuration in the vast majority of applications. If the detection of the impedance and
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the basic conditions of the applications can be adapted using the configuration kit or
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a Bluetooth interface, see chapter 7.1.
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8.2

Description of Function

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The main functions of the grounding monitoring device are:
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• Inspecting and monitoring the connection to the grounding point of the system while a
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clamp is connected.
• Inspecting and monitoring the grounding integrity between the object and the
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filling/discharging point.
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• Grounding the tank in order to discharge the static electricity via a defined resistance
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(100 kΩ) to ground.
• Inspecting and monitoring that the clamp and the grounding monitoring device are
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correctly connected to the object.
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• Inspecting and monitoring that the loop resistance is less than 10 O while the road tanker
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The bleeder resistance is monitored continuously during loading and the state of the
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electrostatic grounding is signalled via a green and red indicator lamp as well as up to
4 potential-free contacts (change-over contacts). The contact can be used to monitor the
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correct grounding and loading can be interrupted in case of incorrect grounding.
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The grounding monitoring device checks the quality of the grounding connection and at the
same time it detects whether the grounding clamp has been fitted correctly to the road tanker
(tanker vehicle) and is not accidentally fitted to the filling device. This automatically ensures
that the system works safely and improper use is ruled out.
The grounded object is connected to the grounding monitoring device via a grounding clamp
and a cable that has a maximum length of 20 m.
When the clamp is connected to the object, the object is always grounded in terms of electric
charge.
Before use, the devices must be configured via a DIP switch for the corresponding object to
be grounded.
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Grounding Monitoring Device
Series 8485
204166 / 848560300010
2019-05-22·BA00·III·en·11