User manual

EW/EG-N/EWB-e-1226

KERN EW/EG-N/EWB

Version 2.6 03/2012

Operating instruction

Precision balances

Table of contents

1 Technical data ............................................................................................ 4

1.1 Read-off of the various weighing units ........................................................................... 10

1.2 Weighing unit conversion charts ..................................................................................... 11

2 Fundamental information (general) ........................................................ 12

2.1 Intended use ....................................................................................................................... 12

2.2 Inappropriate use ............................................................................................................... 12

2.3 Guarantee ............................................................................................................................ 12

2.4 Monitoring the test substances ........................................................................................ 13

3 Fundamental safety information ............................................................. 13

3.1 Observe the information in the operating instructions .................................................. 13

3.2 Staff training ....................................................................................................................... 13

4 Transport and storage ............................................................................. 13

4.1 Acceptance check .............................................................................................................. 13

4.2 Packaging / return transport ............................................................................................. 13

5 Unpacking, installation and commissioning ......................................... 14

5.1 Place of installation, place of use ..................................................................................... 14

5.2 Unpacking ........................................................................................................................... 15

5.2.1 Installation ............................................................................................................................ 15

5.2.2 List of items supplied ............................................................................................................ 15

5.2.3 Positioning the weighing plate .............................................................................................. 16

5.2.4 Serial draft shield installation ................................................................................................ 16

5.2.5 Draft shield installation – optional ......................................................................................... 17

5.2.6 Draft shield with glass sliding doors (only model KERN EW 120-4NM standard)............... 17

5.3 Mains supply....................................................................................................................... 18

5.4 Operation using a rechargeable battery (optional) ......................................................... 18

5.5 Connecting peripheral equipment .................................................................................... 19

5.6 Initial start-up...................................................................................................................... 19

5.6.1 Power display ....................................................................................................................... 19

5.6.2 Bar graph display.................................................................................................................. 19

5.6.3 Stability indication ................................................................................................................. 20

5.6.4 Zero display on the balance ................................................................................................. 20

5.7 Adjustment .......................................................................................................................... 21

5.8 Adjusting ............................................................................................................................. 21

5.8.1 Adjusting with externall weight (only KERN EW-B, EW-N) .................................................. 21

5.8.2 Adjusting with internal weight (only KERN EG) .................................................................... 21

5.8.3 Adjusting with external weight (only KERN EW and EWB) .................................................. 23

5.9 Verification .......................................................................................................................... 25

5.10 Verification switch and official seal ................................................................................. 26