diff --git a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/HVEntry.kt b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/HVEntry.kt
index b38fd45..7547b06 100644
--- a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/HVEntry.kt
+++ b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/HVEntry.kt
@@ -5,20 +5,23 @@ import hep.dataforge.meta.get
 import hep.dataforge.meta.string
 import kotlinx.datetime.Instant
 import kotlinx.datetime.toInstant
-import kotlinx.io.text.forEachUtf8Line
+import kotlinx.io.asInputStream
 
 public data class HVEntry(val timestamp: Instant, val value: Double, val channel: Int = 1) {
     public companion object {
         public fun readString(line: String): HVEntry {
             val (timeStr, channelStr, valueStr) = line.split(' ')
-            return HVEntry(timeStr.toInstant(), valueStr.toDouble(), channelStr.toInt())
+            return HVEntry((timeStr+"Z").toInstant(), valueStr.toDouble(), channelStr.toInt())
         }
 
         public fun readEnvelope(envelope: Envelope): List<HVEntry> {
             check(envelope.meta["type"].string == "voltage"){"Expecting voltage type envelope"}
             return buildList {
                 envelope.data?.read {
-                    forEachUtf8Line { str -> add(readString(str)) }
+                    //Some problems with readLines
+                    asInputStream().bufferedReader().lines().forEach { str->
+                        add(readString(str))
+                    }
                 }
             }
         }
diff --git a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
index 057d100..b6175b8 100644
--- a/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
+++ b/numass-data-proto/src/main/kotlin/ru/inr/mass/data/proto/NumassDirectorySet.kt
@@ -45,9 +45,9 @@ public class NumassDirectorySet internal constructor(
     }
 
     @OptIn(DFExperimental::class)
-    public val hvData: List<HVEntry>? get(){
-        val hvFile = path/"voltage"
-        return if( hvFile.exists()){
+    public fun getHvData(): List<HVEntry>? {
+        val hvFile = path / "voltage"
+        return if (hvFile.exists()) {
             val envelope = context.io.readEnvelopeFile(hvFile)
             HVEntry.readEnvelope(envelope)
         } else {
diff --git a/numass-workspace/numass.json b/numass-workspace/numass.json
index 39fe1e9..1e21025 100644
--- a/numass-workspace/numass.json
+++ b/numass-workspace/numass.json
@@ -11,7 +11,8 @@
         "*mavenLocal",
         "https://dl.bintray.com/mipt-npm/dataforge",
         "https://dl.bintray.com/mipt-npm/kscience",
-        "https://dl.bintray.com/mipt-npm/dev"
+        "https://dl.bintray.com/mipt-npm/dev",
+        "https://kotlin.bintray.com/kotlinx"
     ],
     "properties": {
         "v": "0.1.0-SNAPSHOT"
@@ -29,6 +30,6 @@
         "kscience.plotly.Plot": "HTML(JupyterPlotly.renderPlot($it))",
         "kscience.plotly.PlotlyFragment": "HTML(JupyterPlotly.renderFragment($it))",
         "kscience.plotly.PlotlyPage": "HTML(JupyterPlotly.renderPage($it), true)",
-        "ru.inr.mass.data.proto.NumassDirectorySet": "HTML(JupyterPlotly.renderPage(${it.plotlyPage}), true)"
+        "ru.inr.mass.data.proto.NumassDirectorySet": "HTML(JupyterPlotly.renderPage(${it.plotlyPage()}), true)"
     }
 }
\ No newline at end of file
diff --git a/numass-workspace/src/main/kotlin/ru/inr/mass/scripts/demo.kt b/numass-workspace/src/main/kotlin/ru/inr/mass/scripts/demo.kt
new file mode 100644
index 0000000..690ebe4
--- /dev/null
+++ b/numass-workspace/src/main/kotlin/ru/inr/mass/scripts/demo.kt
@@ -0,0 +1,11 @@
+package ru.inr.mass.workspace
+
+import kscience.plotly.makeFile
+import ru.inr.mass.data.proto.readNumassDirectory
+import java.nio.file.Path
+
+fun main() {
+    val dataPath = Path.of("D:\\Work\\Numass\\data\\2018_04\\Adiabacity_19\\set_4\\")
+    val testSet = NUMASS.context.readNumassDirectory(dataPath)
+    testSet.plotlyPage().makeFile()
+}
\ No newline at end of file
diff --git a/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/AmplitudeSpectrum.kt b/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/AmplitudeSpectrum.kt
index 2606482..3759310 100644
--- a/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/AmplitudeSpectrum.kt
+++ b/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/AmplitudeSpectrum.kt
@@ -14,7 +14,7 @@ import ru.inr.mass.data.api.NumassPoint
 fun NumassPoint.spectrum(): UnivariateHistogram =
     UnivariateHistogram.uniform(1.0) {
         runBlocking {
-            events.collect { put(it.channel.toDouble()) }
+            events.collect { put(it.amplitude.toDouble()) }
         }
     }
 
@@ -26,7 +26,7 @@ fun Collection<NumassPoint>.spectrum(): UnivariateHistogram {
     return UnivariateHistogram.uniform(1.0) {
         runBlocking {
             this@spectrum.forEach { point ->
-                point.events.collect { put(it.channel.toDouble()) }
+                point.events.collect { put(it.amplitude.toDouble()) }
             }
         }
     }
@@ -41,6 +41,6 @@ fun UnivariateHistogram.reShape(
 ): UnivariateHistogram = UnivariateHistogram.uniform(binSize.toDouble()) {
     this@reShape.filter { it.position.toInt() in channelRange }.forEach { bin ->
         if(bin.size > binSize.toDouble()) error("Can't reShape the spectrum with increased binning")
-        putMany(bin.position, bin.value.toLong())
+        putMany(bin.position, bin.value.toInt())
     }
 }
\ No newline at end of file
diff --git a/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/plots.kt b/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/plots.kt
index 3ffa2ed..a692cef 100644
--- a/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/plots.kt
+++ b/numass-workspace/src/main/kotlin/ru/inr/mass/workspace/plots.kt
@@ -5,8 +5,6 @@ import kotlinx.html.h2
 import kscience.kmath.histogram.UnivariateHistogram
 import kscience.kmath.misc.UnstableKMathAPI
 import kscience.plotly.*
-import kscience.plotly.models.Bar
-import kscience.plotly.models.Scatter
 import kscience.plotly.models.Trace
 import ru.inr.mass.data.api.NumassPoint
 import ru.inr.mass.data.proto.HVEntry
@@ -18,41 +16,43 @@ fun Trace.fromSpectrum(histogram: UnivariateHistogram) {
     y.numbers = histogram.map { it.value }
 }
 
-/**
- *
- */
 @OptIn(UnstableKMathAPI::class)
-fun Plot.spectrum(name: String, histogram: UnivariateHistogram): Bar = bar {
+fun Plot.spectrum(name: String, histogram: UnivariateHistogram): Trace = scatter {
     this.name = name
     fromSpectrum(histogram)
 }
 
-fun Plot.amplitudeSpectrum(point: NumassPoint, binSize: Int = 20, range: IntRange = 0..4096, name: String = point.toString()): Bar = bar {
+fun Plot.amplitudeSpectrum(
+    point: NumassPoint,
+    binSize: Int = 20,
+    range: IntRange = 0..2000,
+    name: String = point.toString(),
+): Trace = scatter {
     spectrum(name, point.spectrum().reShape(binSize, range))
 }
 
 /**
  * Generate a plot from hv data
  */
-fun Plot.hvData(data: List<HVEntry>): Scatter = scatter {
+fun Plot.hvData(data: List<HVEntry>): Trace = scatter {
     x.strings = data.map { it.timestamp.toString() }
     y.numbers = data.map { it.value }
 }
 
-fun NumassDirectorySet.plotlyPage(binSize: Int = 20, range: IntRange = 0..4096): PlotlyPage = Plotly.page {
+fun NumassDirectorySet.plotlyPage(binSize: Int = 20, range: IntRange = 0..2000): PlotlyPage = Plotly.page {
     h1 {
         +"Numass point set $path"
     }
-    h2{
+    h2 {
         +"Amplitude spectrum"
     }
     plot {
-        points.forEach {
-            amplitudeSpectrum(it,binSize, range)
+        points.sortedBy { it.index }.forEach {
+            amplitudeSpectrum(it, binSize, range)
         }
     }
-    hvData?.let {entries->
-        h2{
+    getHvData()?.let { entries ->
+        h2 {
             +"HV"
         }
         plot {