diff --git a/DSTAT-temp/src/experiment.c b/DSTAT-temp/src/experiment.c
index 4330646a616f9a920247386fbbf6a9c0541aade5..a262d0fb8fc3cf302fd74a75ae1c9102a182d749 100644
--- a/DSTAT-temp/src/experiment.c
+++ b/DSTAT-temp/src/experiment.c
@@ -248,7 +248,7 @@ void precond(int16_t v1, uint16_t t1, int16_t v2, uint16_t t2){ //assumes potent
 	up = 1;
 	
 	//first potential
-	if (v1 > 0){
+	if (t1 > 0){
 		max5443_set_voltage1(v1);
 		rtc_set_alarm(t1);
 		RTC.CNT = 0;
@@ -271,7 +271,7 @@ void precond(int16_t v1, uint16_t t1, int16_t v2, uint16_t t2){ //assumes potent
 	up = 1;
 	time_old = 0;
 	
-	if (v2 > 0){
+	if (t2 > 0){
 		max5443_set_voltage1(v2);
 		rtc_set_alarm(t2);
 		RTC.CNT = 0;