background image

 

                    The diagram below shows the balance’s connection to earth:

 

 

 

Place the platform balance and the display unit on the intended installation site in the 
ex-area and connect it to earth. 
 

 

CAUTION! 

 

The assembly of the display unit, installation of the platform 
balance and the connection to earth must be carried out within 
a time frame that rules out the risk of developing an explosive 
atmosphere.

 

 

  Place the platform balance in a level, stable place as far away as possible from 

heat sources and drafts.   

  Level the balance with the help of the adjustable feet and a spirit level. 

  Check, whether the adjustable feet stand on the balance base. 

  Ensure that the weight is evenly distributed among the feet. 

  Check once again that the installation site for the balance is level. Exact flatness 

is established when the air bubble of the spirit level is in the centre of the spirit 
level ring. 

 

 

  If further levelling of the platform balance is required, turn the adjustable feet of 

the balance in order to adjust the height. 

  Check the earth contact springs between the platform balance and the weighing 

pan. This ensures that the electrostatic charge is discharged from the weighing 
pan. 

 

Ex-protected area 
IIB group of explosive gasses 

Safe area 

Doc.No.IEX-BA-e-1412 

 

9

 

Summary of Contents for IEX

Page 1: ...H Ziegelei 1 D 72336 Balingen E Mail info kern sohn com Phone 49 0 7433 9933 0 Fax 49 0 7433 9933 149 Internet www kern sohn com Operating manual Platform balance KERN IEX Version 1 2 10 2014 GB Doc No IEX BA e 1412 ...

Page 2: ...ctions in the Operation Manual 3 2 Intended use of IEX scales 4 3 Design of IEX scales with one weighing cell 4 4 ATEX marking meaning of icon 6 5 How to install the balance 8 6 Changing the installation site of the balance 11 7 Cleaning and maintenance 12 8 Technical examination 13 2 Doc No IEX BA e 1412 ...

Page 3: ... familiarize themselves with the device s components described in the operating instructions Display KEX TM Power unit IEX A01 U IEX A01 E These operating instructions should be freely available for consultation to the employees The operating instructions contain the icons shown below Continuously prescribed actions Actions prescribed under certain circumstances Marking essential paragraphs dealin...

Page 4: ...TM Power unit IEX A01 by KERN outside hazardous area Weighing cell executed as ex model Weighing platform non electric mechanical balance component The display unit for series KEX TM is connected by a cable to the dynamometric sensor one weighing cell integrated in the platform The platform balance comprises a weighing pan made of stainless steel providing sufficient protection and allowing easy c...

Page 5: ...Balance series IEX with display unit KEX TM IEX platform balance 300x300 IEX 500x400 Safe area Ex protected area 1 load cell balance IEX A01 power unit Doc No IEX BA e 1412 5 ...

Page 6: ... normal safety level for operation in area 2 Explosive atmosphere G Caused by gas steam and mist D Caused by dust Electrical equipment compatible with one or few types of explosion protection constructions Icon for explosion protection used Construction type o Oil protection p Gas protection with excessive pressure q Sand protection d Flameproof protection e Reinforced construction ia Intrinsicall...

Page 7: ... standards PN EN 60079 0 and PN EN 60079 11 certified by KDB 14ATEX0110 certificate The display unit is powered by mains adapter IEX A01 made by KERN and positioned outside the hazardous and is in conformity with the standards PN EN 60079 0 and PN EN 60079 11 certificate KDB 14ATEX0109 The platform balances are equipped with Flintec ATEX certified weighing cells PC22 PC42 PC46 PC60 supplied by Fli...

Page 8: ...ation on the wall with the help of a holder The balance should be unpacked outside the hazardous zone Remove all transport locking devices after unpacking CAUTION To prevent electrostatic charge connect the balance to earth The contact slots for the wires are marked with the icon Prior to transport prepare a PE conductor for electrostatic connection to earth of the display unit The PE conductor sh...

Page 9: ...e help of the adjustable feet and a spirit level Check whether the adjustable feet stand on the balance base Ensure that the weight is evenly distributed among the feet Check once again that the installation site for the balance is level Exact flatness is established when the air bubble of the spirit level is in the centre of the spirit level ring If further levelling of the platform balance is re...

Page 10: ...l marked DC IN on the display unit 1 Mains connection 2 Connection cable 3 Marking PE conductor 4 Shielded load cell cable 5 Sticker power connection Prior to initial start up ensure that there is no risk of explosion that is that no explosive atmosphere is present If it is obvious that the balance is not functioning properly disconnect the balance from the power supply secure it and contact KERN ...

Page 11: ... out a self test Afterwards the balance will change to zero display thus indicating readiness for operation The following icons will appear Zero indicator Stability display kg Weighing mode weighing unit 6 Changing the installation site of the balance When the balance is to be taken to a different installation site please follow the precautionary measures stated under chapter 5 of these operating ...

Page 12: ...afe operation The adjustable feet of the platform balance and the shock absorbers are made of rubber When they are inside the hazard area you will have to use a slightly moistened cloth for cleaning Moistness protects against electrostatic charges Make sure that you do not damage the earth contact springs during cleaning They serve as a retainer of electrostatic charge on the weighing pan They sho...

Page 13: ...the resistance of the connection max 100Ω The quality of the connection between the platform and the display unit flexible steel tube connecting both subassemblies Damage and loss of a connection is inacceptable The electrical connection between the housing and the platform the maximum resistance between the weighing pan put on should be less than100Ω Stability and levelling of the balance Doc No ...

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