diff --git a/components/actor/heater_sim.py b/components/actor/heater_sim.py
index 47f3845..a6802e4 100644
--- a/components/actor/heater_sim.py
+++ b/components/actor/heater_sim.py
@@ -21,7 +21,8 @@ class HeaterSim(AHeater):
 		return self.is_active
 
 	def process(self):
-		self.power_eff = self.power_set if self.is_active else 0
+		power_set = 100*round(self.power_set/100, 0)
+		self.power_eff = power_set if self.is_active else 0
 
 	def set_power(self, power):
 		self.power_set = max(self.get_power_min(), min(self.get_power_max(), power))
diff --git a/components/actor/hendiCtrl.py b/components/actor/hendiCtrl.py
index 9888fb2..4f1be84 100644
--- a/components/actor/hendiCtrl.py
+++ b/components/actor/hendiCtrl.py
@@ -4,17 +4,10 @@ import time
 import serial
 import sys
 import numpy as np
-import logging
+from contextlib import contextmanager
 
 
 class HendiCtrl:
-	def name(self):
-		return "HendiCtrl"
-	
-	def log(self, s):
-		d = {'user': self.name()}
-		logging.info ("{}".format(s), extra=d)
-
 	def __init__(self, port, baudrate):
 		self.ser = serial.Serial(port, baudrate)
 		try:
@@ -40,7 +33,14 @@ class HendiCtrl:
 		self.poly_d2w = np.polyfit(digits, powers, 5)
 		self.sw_id = self.getSoftwareIdentifier()
 		self.sw_ver = self.getSoftwareVersion()
-		self.log("Create {}, Version {}".format(self.sw_id, self.sw_ver))
+
+	@contextmanager
+	def remote_open(self):
+		try:
+			self.remoteEnable(True)
+			yield None
+		finally:
+			self.remoteEnable(False)
 
 	def toDigits(self, power_watts):
 		return np.polyval(self.poly_w2d, float(power_watts))
@@ -176,10 +176,6 @@ class HendiCtrl:
 
 if __name__ == '__main__':
 
-	logging.getLogger().setLevel(logging.INFO)
-	FORMAT = '%(asctime)-15s %(user)-8s %(message)s'
-	logging.basicConfig(format=FORMAT)
-
 	hendi = HendiCtrl('/dev/ttyUSB0', 115200)
 
 #	hendi.firmware_update("HendiCtrl.srec")
@@ -199,18 +195,16 @@ if __name__ == '__main__':
 		print("power", power)
 
 	print("Test Hendi")
-	hendi.remoteEnable(True)
-	hendi.setSwitch(1)
-	time.sleep(1.0)
-	for pwr in range(500, 3600, 100):
-		hendi.setPowerWatts(pwr)
-		pw = hendi.getPowerWatts()
-		print("power_w", pw)
+	with hendi.remote_open():
+		hendi.setSwitch(1)
 		time.sleep(1.0)
+		for pwr in range(500, 3600, 100):
+			hendi.setPowerWatts(pwr)
+			pw = hendi.getPowerWatts()
+			print("power_w", pw)
+			time.sleep(1.0)
 
-
-	hendi.setSwitch(0)
-	hendi.remoteEnable(False)
+		hendi.setSwitch(0)
 
 	if 0:
 		hendi.remoteEnable(True)