diff --git a/measure.c b/measure.c
index 7184162..c54135e 100644
--- a/measure.c
+++ b/measure.c
@@ -16,7 +16,7 @@
 #include "pattern.h"
 
 
-const float R_REF = 3000.0;
+const float R_REF = 1000.0;
 const uint16_t N_MAX = 1023;
 const float PT1000_R0 = 1000.0;
 const float PT1000_Coeff = 3.85e-3;
@@ -93,7 +93,7 @@ void measureStartConversion() {
 
 
 void measureInit() {
-  ADC10CTL0 = SREF1 | ADC10SHT_3 | ADC10SR | REFOUT | REFON | REF2_5V | ADC10ON;
+  ADC10CTL0 = SREF_0 | ADC10SHT_3 | ADC10SR | ADC10ON;
   ADC10CTL1 = INCH_0;
   ADC10AE0 = BIT0;