--- a/app/view/grid/Messwert.js	Mon Mar 16 17:31:41 2015 +0100
+++ b/app/view/grid/Messwert.js	Mon Mar 16 17:32:15 2015 +0100
@@ -72,6 +72,7 @@
         }, {
             header: 'Messwert',
             dataIndex: 'messwert',
+            xtype: 'numbercolumn',
             width: 80,
             editor: {
                 xtype: 'numberfield',
@@ -97,15 +98,18 @@
             }
         }, {
             header: '<NWG',
+            xtype: 'numbercolumn',
             width: 60,
             dataIndex: 'messwertNwg'
         }, {
             header: 'Nachweisgrenze',
+            xtype: 'numbercolumn',
             width: 110,
             dataIndex: 'nwgZuMesswert'
         }, {
             header: 'Messfehler',
             dataIndex: 'messfehler',
+            xtype: 'numbercolumn',
             width: 80,
             editor: {
                 xtype: 'numberfield',