diff --git a/api/measurement.yaml b/api/measurement.yaml
index 4386a15..d9fcd40 100644
--- a/api/measurement.yaml
+++ b/api/measurement.yaml
@@ -2,7 +2,7 @@
   parameters:
     - $ref: 'api.yaml#/components/parameters/Id'
   get:
-    summary: TODO measurement values by id
+    summary: measurement values by id
     description: 'Auth: all, levels: read, write, maintain, dev, admin'
     tags:
       - /measurement
diff --git a/src/models/condition.ts b/src/models/condition.ts
index 1e24daf..e0f79da 100644
--- a/src/models/condition.ts
+++ b/src/models/condition.ts
@@ -6,7 +6,8 @@ const ConditionSchema = new mongoose.Schema({
   sample_id: {type: mongoose.Schema.Types.ObjectId, ref: SampleModel},
   number: String,
   parameters: mongoose.Schema.Types.Mixed,
-  treatment_template: {type: mongoose.Schema.Types.ObjectId, ref: TreatmentTemplateModel}
+  treatment_template: {type: mongoose.Schema.Types.ObjectId, ref: TreatmentTemplateModel},
+  status: Number
 });
 
 export default mongoose.model('condition', ConditionSchema);
\ No newline at end of file
diff --git a/src/models/measurement.ts b/src/models/measurement.ts
index 401103b..ac0ef20 100644
--- a/src/models/measurement.ts
+++ b/src/models/measurement.ts
@@ -5,8 +5,8 @@ import MeasurementTemplateModel from './measurement_template';
 const MeasurementSchema = new mongoose.Schema({
   condition_id: {type: mongoose.Schema.Types.ObjectId, ref: ConditionModel},
   values: mongoose.Schema.Types.Mixed,
-  status: Number,
-  measurement_template: {type: mongoose.Schema.Types.ObjectId, ref: MeasurementTemplateModel}
+  measurement_template: {type: mongoose.Schema.Types.ObjectId, ref: MeasurementTemplateModel},
+  status: Number
 });
 
 export default mongoose.model('measurement', MeasurementSchema);
\ No newline at end of file
diff --git a/src/routes/condition.spec.ts b/src/routes/condition.spec.ts
index ec71ac3..2967108 100644
--- a/src/routes/condition.spec.ts
+++ b/src/routes/condition.spec.ts
@@ -1,7 +1,7 @@
 import should from 'should/as-function';
 import ConditionModel from '../models/condition';
 import TestHelper from "../test/helper";
-// TODO: status
+
 
 describe('/condition', () => {
   let server;
@@ -70,8 +70,32 @@ describe('/condition', () => {
         url: '/condition/700000000000000000000001',
         auth: {basic: 'janedoe'},
         httpStatus: 200,
-        req: {parameters: {material: 'copper', weeks: 3}},
-        res: {_id: '700000000000000000000001', sample_id: '400000000000000000000001', number: 'B1', treatment_template: '200000000000000000000001', parameters: {material: 'copper', weeks: 3}}
+        req: {parameters: {material: 'copper', weeks: 3}}
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).be.eql({_id: '700000000000000000000001', sample_id: '400000000000000000000001', number: 'B1', treatment_template: '200000000000000000000001', parameters: {material: 'copper', weeks: 3}});
+        ConditionModel.findById('700000000000000000000001').lean().exec((err, data) => {
+          if (err) return done(err);
+          should(data).have.property('status', 10);
+          done();
+        });
+      });
+    });
+    it('keeps only one unchanged parameter', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/condition/700000000000000000000001',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200,
+        req: {parameters: {material: 'copper'}}
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).be.eql({_id: '700000000000000000000001', sample_id: '400000000000000000000001', number: 'B1', treatment_template: '200000000000000000000001', parameters: {material: 'copper', weeks: 3}});
+        ConditionModel.findById('700000000000000000000001').lean().exec((err, data) => {
+          if (err) return done(err);
+          should(data).have.property('status', 10);
+          done();
+        });
       });
     });
     it('changes the given properties', done => {
@@ -86,9 +110,11 @@ describe('/condition', () => {
         should(res.body).be.eql({_id: '700000000000000000000001', sample_id: '400000000000000000000001', number: 'B1', treatment_template: '200000000000000000000001', parameters: {material: 'hot air', weeks: 10}});
         ConditionModel.findById('700000000000000000000001').lean().exec((err, data: any) => {
           if (err) return done(err);
+          should(data).have.only.keys('_id', 'sample_id', 'number', 'parameters', 'treatment_template', 'status', '__v');
           should(data.sample_id.toString()).be.eql('400000000000000000000001');
           should(data).have.property('number', 'B1');
           should(data.treatment_template.toString()).be.eql('200000000000000000000001');
+          should(data).have.property('status', 0);
           should(data).have.property('parameters');
           should(data.parameters).have.property('material', 'hot air');
           should(data.parameters).have.property('weeks', 10);
@@ -205,7 +231,7 @@ describe('/condition', () => {
   // TODO: rewrite delete methods -> set status for every database collection
 
   describe('DELETE /condition/{id}', () => {
-    it('deletes the condition', done => {
+    it('sets the status to deleted', done => {
       TestHelper.request(server, done, {
         method: 'delete',
         url: '/condition/700000000000000000000002',
@@ -214,14 +240,21 @@ describe('/condition', () => {
       }).end((err, res) => {
         if (err) return done(err);
         should(res.body).be.eql({status: 'OK'});
-        ConditionModel.findById('700000000000000000000002').lean().exec((err, data) => {
+        ConditionModel.findById('700000000000000000000002').lean().exec((err, data: any) => {
           if (err) return done(err);
-          should(data).be.null();
+          should(data).have.only.keys('_id', 'sample_id', 'number', 'parameters', 'treatment_template', 'status', '__v');
+          should(data.sample_id.toString()).be.eql('400000000000000000000002');
+          should(data).have.property('number', 'B1');
+          should(data.treatment_template.toString()).be.eql('200000000000000000000001');
+          should(data).have.property('status', -1);
+          should(data).have.property('parameters');
+          should(data.parameters).have.property('material', 'copper');
+          should(data.parameters).have.property('weeks', 3);
           done();
         });
       });
     });
-    it('rejects a deleting a condition referenced by measurements');
+    it('rejects a deleting a condition referenced by measurements');  // TODO
     it('rejects an invalid id', done => {
       TestHelper.request(server, done, {
         method: 'delete',
@@ -315,11 +348,11 @@ describe('/condition', () => {
         if (err) return done(err);
         ConditionModel.findById(res.body._id).lean().exec((err, data: any) => {
           if (err) return done(err);
-          should(data).have.only.keys('_id', 'sample_id', 'number', 'parameters', 'treatment_template', '__v');
-          should(data).have.property('_id');
+          should(data).have.only.keys('_id', 'sample_id', 'number', 'parameters', 'treatment_template', 'status', '__v');
           should(data.sample_id.toString()).be.eql('400000000000000000000002');
           should(data).have.property('number', 'B2');
           should(data.treatment_template.toString()).be.eql('200000000000000000000001');
+          should(data).have.property('status', 0);
           should(data).have.property('parameters');
           should(data.parameters).have.property('material', 'hot air');
           should(data.parameters).have.property('weeks', 10);
diff --git a/src/routes/condition.ts b/src/routes/condition.ts
index a5639e6..8acc2f2 100644
--- a/src/routes/condition.ts
+++ b/src/routes/condition.ts
@@ -1,5 +1,6 @@
 import express from 'express';
 import mongoose from 'mongoose';
+import _ from 'lodash';
 
 import ConditionValidate from './validate/condition';
 import ParametersValidate from './validate/parameters';
@@ -30,7 +31,6 @@ router.put('/condition/' + IdValidate.parameter(), async (req, res, next) => {
   if (!req.auth(res, ['write', 'maintain', 'dev', 'admin'], 'basic')) return;
 
   const {error, value: condition} = ConditionValidate.input(req.body, 'change');
-  console.log(error);
   if (error) return res400(error, res);
 
   const data = await ConditionModel.findById(req.params.id).lean().exec().catch(err => {next(err);}) as any;
@@ -40,11 +40,15 @@ router.put('/condition/' + IdValidate.parameter(), async (req, res, next) => {
   if (!data) {
     res.status(404).json({status: 'Not found'});
   }
+  // add properties needed for sampleIdCheck
   condition.treatment_template = data.treatment_template;
   condition.sample_id = data.sample_id;
   if (!await sampleIdCheck(condition, req, res, next)) return;
   if (condition.parameters) {
-    condition.parameters = Object.assign(data.parameters, condition.parameters);
+    condition.parameters = _.assign({}, data.parameters, condition.parameters);
+    if (!_.isEqual(condition.parameters, data.parameters)) {
+      condition.status = 0;
+    }
   }
   if (!await treatmentCheck(condition, 'change', res, next)) return;
 
@@ -63,7 +67,7 @@ router.delete('/condition/' + IdValidate.parameter(), (req, res, next) => {
       res.status(404).json({status: 'Not found'});
     }
     if (!await sampleIdCheck(data, req, res, next)) return;
-    await ConditionModel.findByIdAndDelete(req.params.id).lean().exec(async err => {
+    await ConditionModel.findByIdAndUpdate(req.params.id, {status: -1}).lean().exec(err => {
       if (err) return next(err);
       res.json({status: 'OK'});
     });
@@ -80,6 +84,7 @@ router.post('/condition/new', async (req, res, next) => {
   if (!await numberCheck(condition, res, next)) return;
   if (!await treatmentCheck(condition, 'new', res, next)) return;
 
+  condition.status = 0;
   await new ConditionModel(condition).save((err, data) => {
     if (err) return next(err);
     res.json(ConditionValidate.output(data.toObject()));
@@ -119,7 +124,6 @@ async function treatmentCheck (condition, param, res, next) {
 
   // validate parameters
   const {error, value: ignore} = ParametersValidate.input(condition.parameters, treatmentData.parameters, param);
-  console.log(error);
   if (error) {res400(error, res); return false;}
   return true;
 }
\ No newline at end of file
diff --git a/src/routes/measurement.spec.ts b/src/routes/measurement.spec.ts
index bba7ca8..7a604d2 100644
--- a/src/routes/measurement.spec.ts
+++ b/src/routes/measurement.spec.ts
@@ -74,6 +74,24 @@ describe('/measurement', () => {
         if (err) return done(err);
         should(res.body).be.eql({_id: '800000000000000000000001', condition_id: '700000000000000000000001', values: {dpt: [[3997.12558,98.00555],[3995.08519,98.03253],[3993.04480,98.02657]]}, measurement_template: '300000000000000000000001'});
         MeasurementModel.findById('800000000000000000000001').lean().exec((err, data: any) => {
+          if (err) return done(err);
+          should(data).have.property('status', 10);
+          done();
+        });
+      });
+    });
+    it('keeps only one unchanged value', done => {
+      TestHelper.request(server, done, {
+        method: 'put',
+        url: '/measurement/800000000000000000000002',
+        auth: {basic: 'janedoe'},
+        httpStatus: 200,
+        req: {values: {'weight %': 0.5}}
+      }).end((err, res) => {
+        if (err) return done(err);
+        should(res.body).be.eql({_id: '800000000000000000000002', condition_id: '700000000000000000000002', values: {'weight %': 0.5, 'standard deviation': 0.2}, measurement_template: '300000000000000000000002'});
+        MeasurementModel.findById('800000000000000000000002').lean().exec((err, data: any) => {
+          if (err) return done(err);
           should(data).have.property('status', 10);
           done();
         });
diff --git a/src/routes/measurement.ts b/src/routes/measurement.ts
index 85bea0e..4aa89c1 100644
--- a/src/routes/measurement.ts
+++ b/src/routes/measurement.ts
@@ -41,12 +41,12 @@ router.put('/measurement/' + IdValidate.parameter(), async (req, res, next) => {
   // add properties needed for conditionIdCheck
   measurement.measurement_template = data.measurement_template;
   measurement.condition_id = data.condition_id;
-  if (measurement.hasOwnProperty('values') && !_.isEqual(measurement.values, data.values)) {
-    measurement.status = 0;
-  }
   if (!await conditionIdCheck(measurement, req, res, next)) return;
   if (measurement.values) {
-    measurement.values = Object.assign(data.values, measurement.values);
+    measurement.values = _.assign({}, data.values, measurement.values);
+    if (!_.isEqual(measurement.values, data.values)) {
+      measurement.status = 0;
+    }
   }
   if (!await templateCheck(measurement, 'change', res, next)) return;
   await MeasurementModel.findByIdAndUpdate(req.params.id, measurement, {new: true}).lean().exec((err, data) => {
@@ -64,7 +64,7 @@ router.delete('/measurement/' + IdValidate.parameter(), (req, res, next) => {
       res.status(404).json({status: 'Not found'});
     }
     if (!await conditionIdCheck(data, req, res, next)) return;
-    await MeasurementModel.findByIdAndUpdate(req.params.id, {status: -1}).lean().exec(async err => {
+    await MeasurementModel.findByIdAndUpdate(req.params.id, {status: -1}).lean().exec(err => {
       if (err) return next(err);
       res.json({status: 'OK'});
     });
diff --git a/src/test/db.json b/src/test/db.json
index 01b06b3..621b385 100644
--- a/src/test/db.json
+++ b/src/test/db.json
@@ -193,6 +193,7 @@
           "weeks": 3
         },
         "treatment_template": {"$oid":"200000000000000000000001"},
+        "status": 10,
         "__v": 0
       },
       {
@@ -204,6 +205,7 @@
           "weeks": 3
         },
         "treatment_template": {"$oid":"200000000000000000000001"},
+        "status": 10,
         "__v": 0
       },
       {
@@ -215,6 +217,7 @@
           "weeks": 3
         },
         "treatment_template": {"$oid":"200000000000000000000001"},
+        "status": 10,
         "__v": 0
       },
       {
@@ -226,6 +229,7 @@
           "weeks": 5
         },
         "treatment_template": {"$oid":"200000000000000000000001"},
+        "status": 10,
         "__v": 0
       }
     ],