diff --git a/site_ansto/instrument/config/environment/temperature/sct_lakeshore_340.tcl b/site_ansto/instrument/config/environment/temperature/sct_lakeshore_340.tcl
index 8e2e8738..77c10c3a 100644
--- a/site_ansto/instrument/config/environment/temperature/sct_lakeshore_340.tcl
+++ b/site_ansto/instrument/config/environment/temperature/sct_lakeshore_340.tcl
@@ -989,6 +989,8 @@ proc sendCmd {tc_root nextState cmd {idx ""}} {
       set sensorValue $tc_root/sensor/sensorValue$whichSensor
       if {$whichCtrlLoop <= 2} {
         set nodename $tc_root/sensor/setpoint$whichCtrlLoop
+        hset $tc_root/control/tolerance1 1
+        hset $tc_root/control/tolerance2 1
         hset $nodename [hval $sensorValue]
         hsetprop $nodename driving 0
       }