sap m select not showing all values from gateway

Hello Experts,

This is the code for my select:

var SelectCondType = new sap.m.Select("SelectCondType", {

   width : "200px"

  });

   var oItemSelectTemplate1 = new sap.ui.core.Item({ 

             key : "{ID}", 

             text : "{Name}" 

         });

  var sServiceUrl = "blablabla.com:8000/sap/opu/odata/sap/YXM_GWS_BART_SRV";

  var oModel = new sap.ui.model.odata.ODataModel(sServiceUrl, false,

  "user", "pass");

  SelectCondType.setModel(oModel);

  SelectCondType.bindAggregation("items","/cond_type",oItemSelectTemplate1);

The select is showing around 50 (didn't really count em) items while there are like 500 in the gateway...

Any Ideas ?

Kind Regards,

Bart