diff -r 4654b8ee4690 -r 3b1510050c9b www/js/inv_equipments.js
--- a/www/js/inv_equipments.js	Thu Mar 19 11:15:29 2020 +0100
+++ b/www/js/inv_equipments.js	Thu Mar 19 13:42:59 2020 +0100
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * Copyright (C) 2014-2019
+ * Copyright (C) 2014-2020
  *
  * Michiel Broek <mbroek at mbse dot eu>
  *
@@ -274,7 +274,7 @@
    $('#boil_time').on('change', function(event) { calcBatchVolume(); });
    $('#top_up_kettle').on('change', function(event) { calcBatchVolume(); });
    $('#calc_boil_volume').on('change', function(event) { calcBatchVolume(); });
-   $('#tun_material').on('change', function(event) {
+   $('#tun_material').on('select', function(event) {
     dataRecord.tun_specific_heat = MaterialData[event.args.index].sh;
     $('#tun_specific_heat').val(dataRecord.tun_specific_heat);
    });