diff --git a/src/classes/PRunAsymmetry.cpp b/src/classes/PRunAsymmetry.cpp
index d4fa8e91..c21577d1 100644
--- a/src/classes/PRunAsymmetry.cpp
+++ b/src/classes/PRunAsymmetry.cpp
@@ -559,6 +559,13 @@ Bool_t PRunAsymmetry::PrepareData()
     return false;
   }
 
+  // keep the field from the meta-data from the data-file
+  fField = runData->GetField();
+
+  // keep the temperature(s) from the meta-data from the data-file
+  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
+    fTemp.push_back(runData->GetTemperature(i));
+
   // collect histogram numbers
   PUIntVector forwardHistoNo;
   PUIntVector backwardHistoNo;
diff --git a/src/classes/PRunAsymmetryBNMR.cpp b/src/classes/PRunAsymmetryBNMR.cpp
index 66b7626c..bab19fe5 100644
--- a/src/classes/PRunAsymmetryBNMR.cpp
+++ b/src/classes/PRunAsymmetryBNMR.cpp
@@ -597,6 +597,13 @@ Bool_t PRunAsymmetryBNMR::PrepareData()
     return false;
   }
 
+  // keep the field from the meta-data from the data-file
+  fField = runData->GetField();
+
+  // keep the temperature(s) from the meta-data from the data-file
+  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
+    fTemp.push_back(runData->GetTemperature(i));
+
   // collect histogram numbers
   PUIntVector forwardHistoNo;
   PUIntVector backwardHistoNo;
diff --git a/src/classes/PRunAsymmetryRRF.cpp b/src/classes/PRunAsymmetryRRF.cpp
index 4c15952b..ace43f52 100644
--- a/src/classes/PRunAsymmetryRRF.cpp
+++ b/src/classes/PRunAsymmetryRRF.cpp
@@ -541,6 +541,13 @@ Bool_t PRunAsymmetryRRF::PrepareData()
     return false;
   }
 
+  // keep the field from the meta-data from the data-file
+  fField = runData->GetField();
+
+  // keep the temperature(s) from the meta-data from the data-file
+  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
+    fTemp.push_back(runData->GetTemperature(i));
+
   // collect histogram numbers
   PUIntVector forwardHistoNo;
   PUIntVector backwardHistoNo;
diff --git a/src/classes/PRunBase.cpp b/src/classes/PRunBase.cpp
index 278632a0..a55707d2 100644
--- a/src/classes/PRunBase.cpp
+++ b/src/classes/PRunBase.cpp
@@ -49,6 +49,7 @@ PRunBase::PRunBase()
   fRunNo = -1;
   fRunInfo = nullptr;
   fRawData = nullptr;
+  fField = -1.0;
   fTimeResolution = -1.0;
 
   fFitStartTime = PMUSR_UNDEFINED;
@@ -90,6 +91,7 @@ PRunBase::PRunBase(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo,
   }
 
   // init private variables
+  fField = -1.0;
   fTimeResolution = -1.0;
   for (Int_t i=0; i<fMsrInfo->GetNoOfFuncs(); i++)
     fFuncValues.push_back(0.0);
diff --git a/src/classes/PRunSingleHisto.cpp b/src/classes/PRunSingleHisto.cpp
index a7f72b1b..17b852b3 100644
--- a/src/classes/PRunSingleHisto.cpp
+++ b/src/classes/PRunSingleHisto.cpp
@@ -709,6 +709,13 @@ Bool_t PRunSingleHisto::PrepareData()
     return false;
   }
 
+  // keep the field from the meta-data from the data-file
+  fField = runData->GetField();
+
+  // keep the temperature(s) from the meta-data from the data-file
+  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
+    fTemp.push_back(runData->GetTemperature(i));
+
   // collect histogram numbers
   PUIntVector histoNo; // histoNo = msr-file forward + redGreen_offset - 1
   for (UInt_t i=0; i<fRunInfo->GetForwardHistoNoSize(); i++) {
diff --git a/src/classes/PRunSingleHistoRRF.cpp b/src/classes/PRunSingleHistoRRF.cpp
index cf83c936..ebf3cdc0 100644
--- a/src/classes/PRunSingleHistoRRF.cpp
+++ b/src/classes/PRunSingleHistoRRF.cpp
@@ -440,6 +440,13 @@ Bool_t PRunSingleHistoRRF::PrepareData()
     return false;
   }
 
+  // keep the field from the meta-data from the data-file
+  fField = runData->GetField();
+
+  // keep the temperature(s) from the meta-data from the data-file
+  for (unsigned int i=0; i<runData->GetNoOfTemperatures(); i++)
+    fTemp.push_back(runData->GetTemperature(i));
+
   // collect histogram numbers
   PUIntVector histoNo; // histoNo = msr-file forward + redGreen_offset - 1
   for (UInt_t i=0; i<fRunInfo->GetForwardHistoNoSize(); i++) {
diff --git a/src/include/PRunBase.h b/src/include/PRunBase.h
index 5a12976f..8068026a 100644
--- a/src/include/PRunBase.h
+++ b/src/include/PRunBase.h
@@ -73,6 +73,8 @@ class PRunBase
 
     PRunData fData;             ///< data to be fitted, viewed, i.e. binned data
     Double_t fTimeResolution;   ///< time resolution in (us)
+    Double_t fField;            ///< field from the meta-data of the data file
+    PDoubleVector fTemp;        ///< temperature(s) from the meta-data of the data file : first = temp, second = std. dev. of the temperature
     PDoubleVector fT0s;         ///< all t0 bins of a run! The derived classes will handle it.
     std::vector<PDoubleVector> fAddT0s; ///< all t0 bins of all addrun's of a run! The derived classes will handle it.