diff --git a/README.md b/README.md
index aa3ceb4..670dfda 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,3 @@
 # TH7
 
-
+Note: Most thermocouples that have a coloured and a white lead, usually have the coloured one as the positive.
diff --git a/config.toml b/config.toml
index 632b457..4ed7514 100644
--- a/config.toml
+++ b/config.toml
@@ -6,8 +6,14 @@ logfreq = 60
 type = "sqlite3"
 path = "test.db"
 
+[Channel_1]
+type = 'J'
+
 [Channel_2]
+type = 'N'
+
+[Channel_3]
+type = 'T'
+
+[Channel_4]
 type = 'K'
-unit = 'C'
-gain = 106.8
-offset = 2.4