diff --git a/IM520/body.png b/IM520/body.png
index 0cfda51ea39d8908dec5332de5a227f3d044c66a..48a6bea76b8971556d901eae91b3e7c435f96ef4 100644
Binary files a/IM520/body.png and b/IM520/body.png differ
diff --git a/IM520/createImages b/IM520/createImages
index 9efaeec3523bf1d3d7b2f61391abdc69a90c28c6..b0cb51e4da6052fa85a582009934ed180c6b8a47 100755
--- a/IM520/createImages
+++ b/IM520/createImages
@@ -1,29 +1,40 @@
 #!/bin/bash
 #
-# Rolf Niepraschk <Rolf.Niepraschk@ptb.de>, 2017-04-03
+# Rolf Niepraschk <Rolf.Niepraschk@ptb.de>, 2017-04-07
 #
 # Erzeugt aus einem leeren Messgeräte-Bild und neun 7-Segment-Bildern
-# neue Messgeräte-Bilder mit zufälliger Anzeige
+# neue Messgeräte-Bilder 
 #
 # Parameter1 = Anzahl der erzeugten Bilddateien
 #
-
+# Parameter2 = Anzahl der Einzelziffern
 
 MAIN="IM520" # device name
 IMAGE_DIR=./images
-MAX_DIGITS=5 # do not edit!
+MAX_DIGITS=6 # do not edit!
 MAX_FILES=10 # do not edit!
 NUMBER_OF_DIGITS=$MAX_DIGITS
 
+SHOW_EXP=true
+
 if [ -n "$1" ]; then
   MAX_FILES=$1
   if [ -n "$2" ]; then
+    SHOW_EXP=false
     NUMBER_OF_DIGITS=$2
   fi  
 fi
 
+if (( $NUMBER_OF_DIGITS > $MAX_DIGITS )); then
+  NUMBER_OF_DIGITS=$MAX_DIGITS
+else 
+  if (( $NUMBER_OF_DIGITS < 1 )); then
+    NUMBER_OF_DIGITS=1
+  fi
+fi
+
 rm -rf "$IMAGE_DIR"
-mkdir -p "$IMAGE_DIR"
+mkdir -p "$IMAGE_DIR" 
 
 dotFile='dot.png'
 minusFile='minus.png'
@@ -39,46 +50,88 @@ digitFile[6]='digit-6.png'
 digitFile[7]='digit-7.png'
 digitFile[8]='digit-8.png'
 digitFile[9]='digit-9.png'
-digitFile[99]=$emptyCanvas # empty canvas
+digitFile[10]='minus.png'
+digitFile[11]='digit-E.png'
+
+NUM2CHAR[0]='0'
+NUM2CHAR[1]='1'
+NUM2CHAR[2]='2'
+NUM2CHAR[3]='3'
+NUM2CHAR[4]='4'
+NUM2CHAR[5]='5'
+NUM2CHAR[6]='6'
+NUM2CHAR[7]='7'
+NUM2CHAR[8]='8'
+NUM2CHAR[9]='9'
+NUM2CHAR[10]='-'
+NUM2CHAR[11]='E'
 
 digitPos[1]='+272+160'
-digitPos[2]='+296+160'
-digitPos[3]='+313+160'
-digitPos[4]='+360+160'
-digitPos[5]='+375+160'
+digitPos[2]='+294+160'
+digitPos[3]='+316+160'
+digitPos[4]='+338+160'
+digitPos[5]='+360+160'
+digitPos[6]='+382+160'
+digitPos[7]='+404+160'
+
+dotPos[1]=${digitPos[1]}
+dotPos[2]=${digitPos[2]}
+dotPos[3]=${digitPos[3]}
+dotPos[4]=${digitPos[4]}
+dotPos[5]=${digitPos[5]}
+dotPos[6]=${digitPos[6]}
+dotPos[7]=${digitPos[7]}
 
 for ((FNb=1; FNb<=MAX_FILES; FNb++)); do
 
-for (( i=1; i<=$MAX_DIGITS; i++ )); do 
-  DNR[$i]=$((RANDOM % 10)) # random digit number (0..9)
-  eval DIGIT$i=${digitFile[ ${DNR[i]} ]}
-done 
+value=""
+DPR=$((RANDOM % $NUMBER_OF_DIGITS + 1)) # random dot position (1..$NUMBER_OF_DIGITS)
+for (( i=1; i<=$MAX_DIGITS; i++ )); do
+  if (( $i <= $NUMBER_OF_DIGITS )); then
+    R=$((RANDOM % 12)) # random digit number (0..11='0'..'E')
+    eval DIGIT$i=${digitFile[R]}
+    value+="${NUM2CHAR[R]}"
+    if [ $DPR == $i ]; then
+      eval DOT$i="$dotFile"
+      value+="."
+    else
+      eval DOT$i=$emptyCanvas;
+    fi
+  else
+    eval DIGIT$i=$emptyCanvas;
+    eval DOT$i=$emptyCanvas;
+  fi
+done
+
+fname="$IMAGE_DIR/$MAIN@$value@.png" 
 
-value="${DNR[1]}.${DNR[2]}${DNR[3]}E-${DNR[4]}${DNR[5]}"
-
-fname="$IMAGE_DIR/$MAIN@$value@.png"
+echo -e "$FNb:\t$fname"
 
 convert body.png \
-  $DIGIT1  -geometry ${digitPos[1]}  -composite \
-  $DIGIT2  -geometry ${digitPos[2]}  -composite \
-  $DIGIT3  -geometry ${digitPos[3]}  -composite \
-  $DIGIT4  -geometry ${digitPos[4]}  -composite \
-  $DIGIT5  -geometry ${digitPos[5]}  -composite \
+  $DIGIT1   -geometry ${digitPos[1]}  -composite \
+  $DIGIT2   -geometry ${digitPos[2]}  -composite \
+  $DIGIT3   -geometry ${digitPos[3]}  -composite \
+  $DIGIT4   -geometry ${digitPos[4]}  -composite \
+  $DIGIT5   -geometry ${digitPos[5]}  -composite \
+  $DIGIT6   -geometry ${digitPos[6]}  -composite \
+  $DOT1     -geometry ${dotPos[1]} -composite \
+  $DOT2     -geometry ${dotPos[2]} -composite \
+  $DOT3     -geometry ${dotPos[3]} -composite \
+  $DOT4     -geometry ${dotPos[4]} -composite \
+  $DOT5     -geometry ${dotPos[5]} -composite \
+  $DOT6     -geometry ${dotPos[6]} -composite \
   $fname
-
+  
 exiv2 -M"set Exif.Image.ImageDescription value=$value" $fname
 
-echo -e "$FNb:\t$fname"
-
 done # MAX_FILES
 
 exit
-  
+
 -----------------------------------------------------------------------
 
 Auslesen der Exif-Daten:
-exiv2 -g Exif.Image.ImageDescription -P v ./images/151.108@GERAET_X.png
---> value=151.108
+exiv2 -g Exif.Image.ImageDescription -P v ./images/ADIXEN@???@.png
+--> value=???
 
-exit
 
diff --git a/IM520/testImage b/IM520/testImage
index 2e1b0c3d55df1c2768996d4cbdda3f3b5dc1689e..be990c9ffc599983ad1cb36445180497c9810831 100755
--- a/IM520/testImage
+++ b/IM520/testImage
@@ -19,26 +19,53 @@ digitFile[6]='digit-6.png'
 digitFile[7]='digit-7.png'
 digitFile[8]='digit-8.png'
 digitFile[9]='digit-9.png'
-digitFile[99]=$emptyCanvas # empty canvas
+digitFile[10]='minus.png'
+digitFile[11]='digit-E.png'
 
-DNR[5]=5
-DNR[4]=4
-DNR[3]=1
-DNR[2]=0
-DNR[1]=8
+DNR[1]=5
+DNR[2]=4
+DNR[3]=11
+DNR[4]=0
+DNR[5]=2
+DNR[6]=8
 
-digitPos[5]='+272+160'
-digitPos[4]='+296+160'
-digitPos[3]='+313+160'
-digitPos[2]='+360+160'
-digitPos[1]='+375+160'
+DP[1]=$emptyCanvas
+DP[2]=$emptyCanvas 
+DP[3]=$emptyCanvas
+DP[3]=dot.png
+DP[4]=$emptyCanvas
+DP[5]=$emptyCanvas
+DP[6]=$emptyCanvas
+
+digitPos[1]='+272+160'
+digitPos[2]='+294+160'
+digitPos[3]='+316+160'
+digitPos[4]='+338+160'
+digitPos[5]='+360+160'
+digitPos[6]='+382+160'
+digitPos[7]='+404+160'
+
+dotPos[1]=${digitPos[1]}
+dotPos[2]=${digitPos[2]}
+dotPos[3]=${digitPos[3]}
+dotPos[4]=${digitPos[4]}
+dotPos[5]=${digitPos[5]}
+dotPos[6]=${digitPos[6]}
+dotPos[7]=${digitPos[7]}
 
 convert body.png \
-  ${digitFile[ ${DNR[5]} ]}  -geometry ${digitPos[5]}  -composite \
-  ${digitFile[ ${DNR[4]} ]}  -geometry ${digitPos[4]}  -composite \
-  ${digitFile[ ${DNR[3]} ]}  -geometry ${digitPos[3]}  -composite \
-  ${digitFile[ ${DNR[2]} ]}  -geometry ${digitPos[2]}  -composite \
   ${digitFile[ ${DNR[1]} ]}  -geometry ${digitPos[1]}  -composite \
+  ${digitFile[ ${DNR[2]} ]}  -geometry ${digitPos[2]}  -composite \
+  ${digitFile[ ${DNR[3]} ]}  -geometry ${digitPos[3]}  -composite \
+  ${digitFile[ ${DNR[4]} ]}  -geometry ${digitPos[4]}  -composite \
+  ${digitFile[ ${DNR[5]} ]}  -geometry ${digitPos[5]}  -composite \
+  ${digitFile[ ${DNR[6]} ]}  -geometry ${digitPos[6]}  -composite \
+  ${DP[1]}  -geometry ${dotPos[1]} -composite \
+  ${DP[2]}  -geometry ${dotPos[2]} -composite \
+  ${DP[3]}  -geometry ${dotPos[3]} -composite \
+  ${DP[4]}  -geometry ${dotPos[4]} -composite \
+  ${DP[5]}  -geometry ${dotPos[5]} -composite \
+  ${DP[6]}  -geometry ${dotPos[6]} -composite \
   $fname
   
 value="${DNR[5]}.${DNR[4]}${DNR[3]}E-"