diff --git a/pytec/pytec/gui/view/param_tree.json b/pytec/pytec/gui/view/param_tree.json
index d88e521..b3ac362 100644
--- a/pytec/pytec/gui/view/param_tree.json
+++ b/pytec/pytec/gui/view/param_tree.json
@@ -216,7 +216,7 @@
                "title": "R₀",
                "type": "float",
                "value": 10000,
-               "step": 1,
+               "step": 100,
                "siPrefix": true,
                "suffix": "Ω",
                "noUnitEditing": true,
@@ -234,7 +234,7 @@
                "title": "B",
                "type": "float",
                "value": 3950,
-               "step": 1,
+               "step": 10,
                "suffix": "K",
                "noUnitEditing": true,
                "decimals": 4,
@@ -281,7 +281,6 @@
                "title": "Kp",
                "type": "float",
                "step": 0.1,
-               "suffix": "",
                "compactHeight": false,
                "param": [
                   "pid",
@@ -429,7 +428,6 @@
                      "type": "float",
                      "value": 1.5,
                      "step": 0.1,
-                     "prefix": "±",
                      "format": "{value:.4f} {suffix}",
                      "suffix": "°C",
                      "noUnitEditing": true,