diff --git a/ads1210.cpp b/ads1210.cpp
index 5171172..d1278e6 100644
--- a/ads1210.cpp
+++ b/ads1210.cpp
@@ -15,7 +15,7 @@
 
 
 const uint8_t CONFIG_CAL_OFFSET = 0;
-const uint8_t CONFIG_CAL_FACTOR = 2;
+const uint8_t CONFIG_CAL_FACTOR = 4;
 
 
 void ADS1210::enableCS() const {