diff --git a/trust.ui b/trust.ui
index 2342452..a087018 100644
--- a/trust.ui
+++ b/trust.ui
@@ -571,10 +571,10 @@
         <number>2</number>
        </property>
        <property name="minimum">
-        <double>1.000000000000000</double>
+        <double>-50.000000000000000</double>
        </property>
        <property name="maximum">
-        <double>99.900000000000006</double>
+        <double>50.000000000000000</double>
        </property>
       </widget>
       <widget class="QLabel" name="label">
@@ -587,7 +587,7 @@
         </rect>
        </property>
        <property name="text">
-        <string>0 - 13.99 V</string>
+        <string>-50 - 50 V</string>
        </property>
       </widget>
       <widget class="QCheckBox" name="checkBox_negation">