diff --git a/snAPI/Main.py b/snAPI/Main.py
index b794c56..1dcfa80 100644
--- a/snAPI/Main.py
+++ b/snAPI/Main.py
@@ -199,7 +199,7 @@ def __new__(cls, *args, **kwargs):
         return super().__new__(cls)
     
 
-    def __init__(self, systemIni: str | None = None, libType: LibType | None = LibType.MH):
+    def __init__(self, systemIni: typing.Union[str, None] = None, libType: typing.Union[LibType, None] = LibType.MH):
         if systemIni is None:
             systemIni = "\\".join(inspect.getfile(snAPI).split("\\")[:-1])+'\\system.ini'
         self.device = Device(self)
@@ -543,6 +543,7 @@ def getFileDevice(self, path: str):
         SBuf = path.encode('utf-8')
         if ok:= self.dll.getFileDevice(SBuf):
             ok = self.getDeviceConfig()
+            ok &= self.getMeasDescription()
         return ok
 
 
@@ -893,7 +894,7 @@ def getCountRates(self,):
         countRates = ct.ARRAY(ct.c_int, 64)()
         ok = self.dll.getCountRates(syncRate, countRates)
         a = np.array(countRates)
-        a = np.resize(a, self.getNumAllChannels())
+        a = np.resize(a, self.deviceConfig["NumChans"])
         a = np.insert(a, 0, syncRate.contents.value)
         return a
     
diff --git a/tools/Tool_PlotCountRateByTriggerLevel.py b/tools/Tool_PlotCountRateByTriggerLevel.py
index f6f5715..e491dce 100644
--- a/tools/Tool_PlotCountRateByTriggerLevel.py
+++ b/tools/Tool_PlotCountRateByTriggerLevel.py
@@ -1,5 +1,6 @@
 import sys
-import os 
+import os
+import time 
 sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
 
 from snAPI.Main import *
@@ -10,38 +11,43 @@
 
 if(__name__ == "__main__"):
 
-    sn = snAPI(libType=LibType.HH)
+    sn = snAPI(libType=LibType.PH330)
     sn.getDevice()
     sn.initDevice()
-    x, sync, chan1, chan2, chan3, chan4 = [],[],[],[],[],[]
+    sn.loadIniConfig("config\PH330_Edge.ini")
+    
     numChans = sn.deviceConfig["NumChans"]
+    x, sync =  [],[]
+    chan = [[] for _ in range(numChans)] 
+
     plt.show(block=False)
-    
+    init = True
     # set start, stop, step for the trigger level scan
-    for trigLvl in range(0, 500, 10):
+    for trigLvl in range(-500, 0, 1):
         if sn.deviceConfig["SyncTrigMode"] == "Edge":
             sn.device.setInputEdgeTrig(-1, trigLvl, 0)
             sn.device.setSyncEdgeTrig(trigLvl, 0)
         elif sn.deviceConfig["SyncTrigMode"] == "CFD":
             sn.device.setInputCFD(-1, trigLvl, 0)
             sn.device.setSyncCFD(trigLvl, 0)
+        
+        if init:
+            init = False
+            time.sleep(0.1)
             
         cntRs = sn.getCountRates()
         
         sn.logPrint(trigLvl, cntRs)
         x.append(trigLvl)
         sync.append(cntRs[0])
-        chan1.append(cntRs[1])
-        chan2.append(cntRs[2])
-        # chan3.append(cntRs[3])
-        # chan4.append(cntRs[4])
+        for i in range(numChans):
+            chan[i].append(cntRs[i+1])
         
         plt.clf()
-        plt.plot(x, sync, linewidth=2.0, label='sync')
-        plt.plot(x, chan1, linewidth=2.0, label='chan1')
-        plt.plot(x, chan2, linewidth=2.0, label='chan2')
-        # plt.plot(x, chan3, linewidth=2.0, label='chan3')
-        # plt.plot(x, chan4, linewidth=2.0, label='chan4')
+        plt.plot(x, chan[0], linewidth=2.0, label='sync')
+        for i in range(numChans):
+            plt.plot(x, chan[i], linewidth=2.0, label=f"chan{str(i)}")
+
         plt.xlabel('Trigger Level [mV]')
         plt.ylabel('Counts')
         plt.legend()