diff --git a/app/src/main/java/com/example/hpostesting/data/constant/Constants.kt b/app/src/main/java/com/example/hpostesting/data/constant/Constants.kt
index 33aff22..3183d9e 100644
--- a/app/src/main/java/com/example/hpostesting/data/constant/Constants.kt
+++ b/app/src/main/java/com/example/hpostesting/data/constant/Constants.kt
@@ -75,6 +75,6 @@ object Constants {
     const val BUFFER_VALUE_4 = "BufferValue4"
     const val DEVICE_ID = "DEVICE_ID"
 
-    const val BUFFER_LED_LOWER_BOUND = 20000
-    const val BUFFER_LED_HIGHER_BOUND = 24000
+    const val BUFFER_LED_LOWER_BOUND = 21000
+    const val BUFFER_LED_UPPER_BOUND = 24500
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
index 735fcc6..3b7124a 100644
--- a/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
+++ b/app/src/main/java/com/example/hpostesting/presentation/hemocube/HemoCubeFragment.kt
@@ -5,7 +5,6 @@ import android.content.Intent
 import android.content.SharedPreferences
 import android.graphics.Color
 import android.os.Bundle
-import android.util.Log
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
@@ -20,7 +19,6 @@ import com.example.hpostesting.data.model.patient.DeviceData
 import com.example.hpostesting.data.model.patient.toHemoCubeTestData
 import com.example.hpostesting.presentation.UsbServiceListener
 import com.example.hpostesting.presentation.dashboard.DashboardActivity
-import com.example.hpostesting.presentation.diagnostics.DiagnosticsActivity
 import com.example.hpostesting.presentation.utils.MyDialogListener
 import com.example.hpostesting.presentation.utils.UIUtils
 import com.google.firebase.crashlytics.ktx.crashlytics
@@ -35,7 +33,7 @@ class HemoCubeFragment : Fragment() {
     private lateinit var binding: FragmentHemoCubeReferenceBinding
     private val hemoCubeViewModel: HemoCubeViewModel by activityViewModels()
     private lateinit var sharedPreferences: SharedPreferences
-    val testDetails = DataHolder.selectedTest?.toHemoCubeTestData()
+    private val testDetails = DataHolder.selectedTest?.toHemoCubeTestData()
     private var isOnline = false
     private var currentDeviceData: DeviceData? = null
     private var resultData: String = ""
@@ -95,7 +93,7 @@ class HemoCubeFragment : Fragment() {
         binding.btnSamplestart.setOnClickListener {
             activity?.runOnUiThread {
                 binding.tvSubtitle4.visibility = View.VISIBLE
-                binding.tvSubtitle4.text = "Sample Started"
+//                binding.tvSubtitle4.text = "Sample Started"
             }
             startSampleProcess()
             it.visibility = View.GONE
@@ -423,19 +421,19 @@ class HemoCubeFragment : Fragment() {
             ) {
                 validationError = true
                 activity?.runOnUiThread {
-                    binding.errorMessage.text = "Error: Invalid Test. Blank reading is too low"
+                    binding.errorMessage.text = "Error: Invalid Test. Improper buffer reading"
                     binding.errorMessage.visibility = View.VISIBLE
                 }
             }
 
-            if (led1BufferForDevice > Constants.BUFFER_LED_HIGHER_BOUND
-                || led2BufferForDevice > Constants.BUFFER_LED_HIGHER_BOUND
-                || led3BufferForDevice > Constants.BUFFER_LED_HIGHER_BOUND
-                || led4BufferForDevice > Constants.BUFFER_LED_HIGHER_BOUND
+            if (led1BufferForDevice > Constants.BUFFER_LED_UPPER_BOUND
+                || led2BufferForDevice > Constants.BUFFER_LED_UPPER_BOUND
+                || led3BufferForDevice > Constants.BUFFER_LED_UPPER_BOUND
+                || led4BufferForDevice > Constants.BUFFER_LED_UPPER_BOUND
             ) {
                 validationError = true
                 activity?.runOnUiThread {
-                    binding.errorMessage.text = "Error: Invalid Test. Blank reading is too high"
+                    binding.errorMessage.text = "Error: Invalid Test. Improper buffer reading"
                     binding.errorMessage.visibility = View.VISIBLE
                 }
             }