diff --git a/CHANGES.rst b/CHANGES.rst
index eb88f13818..db09a156b8 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,6 +6,7 @@ Changelog
 
 **Added**
 
+- #1588 Dynamic Analysis Specs: Lookup dynamic spec only when the specification is set
 - #1586 Allow to configure the variables for IDServer with an Adapter
 - #1584 Date (yymmdd) support in IDs generation
 - #1582 Allow to retest analyses without the need of retraction
@@ -14,6 +15,7 @@ Changelog
 
 **Changed**
 
+- #1588 Dynamic Analysis Specs: Hide compliance viewlets
 - #1579 Remove classic mode in folderitems
 - #1577 Do not force available workflow transitions in batches listing
 - #1573 Do not display top-level "Clients" folder to non-lab users
diff --git a/bika/lims/browser/viewlets/analysisrequest.py b/bika/lims/browser/viewlets/analysisrequest.py
index a1e32397e6..7cdb19e7b3 100644
--- a/bika/lims/browser/viewlets/analysisrequest.py
+++ b/bika/lims/browser/viewlets/analysisrequest.py
@@ -97,6 +97,13 @@ class ResultsRangesOutOfDateViewlet(ViewletBase):
     specification ranges will be used instead of the new ones.
     """
 
+    def available(self):
+        spec = self.context.getSpecification()
+        if spec:
+            dynamic_spec = spec.getDynamicAnalysisSpec()
+            return not dynamic_spec
+        return True
+
     def is_specification_editable(self):
         """Returns whether the Specification field is editable or not
         """
@@ -136,6 +143,13 @@ class SpecificationNotCompliantViewlet(ViewletBase):
     analyses are different from the Specification initially set.
     """
 
+    def available(self):
+        spec = self.context.getSpecification()
+        if spec:
+            dynamic_spec = spec.getDynamicAnalysisSpec()
+            return not dynamic_spec
+        return True
+
     def is_specification_editable(self):
         """Returns whether the Specification field is editable or not
         """
diff --git a/bika/lims/browser/viewlets/templates/resultsranges_out_of_date_viewlet.pt b/bika/lims/browser/viewlets/templates/resultsranges_out_of_date_viewlet.pt
index dfe1b31dcd..d2b1ee88e8 100644
--- a/bika/lims/browser/viewlets/templates/resultsranges_out_of_date_viewlet.pt
+++ b/bika/lims/browser/viewlets/templates/resultsranges_out_of_date_viewlet.pt
@@ -1,15 +1,14 @@
 <div tal:omit-tag=""
-     tal:define="out_of_date python:view.is_results_ranges_out_of_date()"
-     tal:condition="python:out_of_date"
+     tal:condition="python:view.available()"
      i18n:domain="senaite.core">
 
-  <div class="visualClear"></div>
-
   <div id="portal-alert"
        tal:define="sample python:view.context;
                    editable python:view.is_specification_editable();
                    alert_class python: editable and 'alert-warning' or 'alert-info';
-                   alert_class python: 'portlet-alert-item alert {} alert-dismissible'.format(alert_class)">
+                   alert_class python: 'portlet-alert-item alert {} alert-dismissible'.format(alert_class);
+                   out_of_date python:view.is_results_ranges_out_of_date()"
+       tal:condition="out_of_date">
 
     <div tal:attributes="class python: alert_class">
       <button type="button" class="close" data-dismiss="alert" aria-label="Close">
diff --git a/bika/lims/browser/viewlets/templates/specification_non_compliant_viewlet.pt b/bika/lims/browser/viewlets/templates/specification_non_compliant_viewlet.pt
index d65e48cae9..c26196905e 100644
--- a/bika/lims/browser/viewlets/templates/specification_non_compliant_viewlet.pt
+++ b/bika/lims/browser/viewlets/templates/specification_non_compliant_viewlet.pt
@@ -1,15 +1,14 @@
 <div tal:omit-tag=""
-     tal:define="non_compliant python:view.get_non_compliant_analyses()"
-     tal:condition="python:non_compliant"
+     tal:condition="python:view.available()"
      i18n:domain="senaite.core">
 
-  <div class="visualClear"></div>
-
   <div id="portal-alert"
        tal:define="sample python:view.context;
+                   non_compliant python:view.get_non_compliant_analyses()
                    editable python:view.is_specification_editable();
                    alert_class python: editable and 'alert-warning' or 'alert-info';
-                   alert_class python: 'portlet-alert-item alert {} alert-dismissible'.format(alert_class)">
+                   alert_class python: 'portlet-alert-item alert {} alert-dismissible'.format(alert_class)"
+       tal:condition="non_compliant">
 
     <div tal:attributes="class python: alert_class">
       <button type="button" class="close" data-dismiss="alert" aria-label="Close">
diff --git a/bika/lims/content/abstractroutineanalysis.py b/bika/lims/content/abstractroutineanalysis.py
index d60a441f9a..1dae2a96b1 100644
--- a/bika/lims/content/abstractroutineanalysis.py
+++ b/bika/lims/content/abstractroutineanalysis.py
@@ -43,7 +43,6 @@
 from bika.lims.content.reflexrule import doReflexRuleAction
 from bika.lims.interfaces import IAnalysis
 from bika.lims.interfaces import ICancellable
-from bika.lims.interfaces import IDynamicResultsRange
 from bika.lims.interfaces import IInternalUse
 from bika.lims.interfaces import IRoutineAnalysis
 from bika.lims.interfaces.analysis import IRequestAnalysis
@@ -325,19 +324,15 @@ def getResultsRange(self):
         """Returns the valid result range for this routine analysis
 
         A routine analysis will be considered out of range if it result falls
-        out of the range defined in "min" and "max". If there are values set for
-        "warn_min" and "warn_max", these are used to compute the shoulders in
-        both ends of the range. Thus, an analysis can be out of range, but be
-        within shoulders still.
+        out of the range defined in "min" and "max". If there are values set
+        for "warn_min" and "warn_max", these are used to compute the shoulders
+        in both ends of the range. Thus, an analysis can be out of range, but
+        be within shoulders still.
+
         :return: A dictionary with keys "min", "max", "warn_min" and "warn_max"
         :rtype: dict
         """
-        results_range = self.getField("ResultsRange").get(self)
-        # dynamic results range adapter
-        adapter = IDynamicResultsRange(self, None)
-        if adapter:
-            results_range.update(adapter())
-        return results_range
+        return self.getField("ResultsRange").get(self)
 
     @security.public
     def getSiblings(self, with_retests=False):
diff --git a/bika/lims/content/analysisrequest.py b/bika/lims/content/analysisrequest.py
index 65f970fbc2..2de5c2bdd1 100644
--- a/bika/lims/content/analysisrequest.py
+++ b/bika/lims/content/analysisrequest.py
@@ -25,33 +25,6 @@
 from urlparse import urljoin
 
 from AccessControl import ClassSecurityInfo
-from DateTime import DateTime
-from Products.ATExtensions.field import RecordsField
-from Products.Archetypes.Widget import RichWidget
-from Products.Archetypes.atapi import BaseFolder
-from Products.Archetypes.atapi import BooleanField
-from Products.Archetypes.atapi import BooleanWidget
-from Products.Archetypes.atapi import ComputedField
-from Products.Archetypes.atapi import ComputedWidget
-from Products.Archetypes.atapi import FileField
-from Products.Archetypes.atapi import FileWidget
-from Products.Archetypes.atapi import FixedPointField
-from Products.Archetypes.atapi import ReferenceField
-from Products.Archetypes.atapi import StringField
-from Products.Archetypes.atapi import StringWidget
-from Products.Archetypes.atapi import TextField
-from Products.Archetypes.atapi import registerType
-from Products.Archetypes.public import Schema
-from Products.Archetypes.references import HoldingReference
-from Products.CMFCore.permissions import ModifyPortalContent
-from Products.CMFCore.permissions import View
-from Products.CMFCore.utils import getToolByName
-from Products.CMFPlone.utils import _createObjectByType
-from Products.CMFPlone.utils import safe_unicode
-from zope.interface import alsoProvides
-from zope.interface import implements
-from zope.interface import noLongerProvides
-
 from bika.lims import api
 from bika.lims import bikaMessageFactory as _
 from bika.lims import deprecated
@@ -60,9 +33,9 @@
 from bika.lims.browser.fields import ARAnalysesField
 from bika.lims.browser.fields import DateTimeField
 from bika.lims.browser.fields import DurationField
+from bika.lims.browser.fields import EmailsField
 from bika.lims.browser.fields import ResultsRangesField
 from bika.lims.browser.fields import UIDReferenceField
-from bika.lims.browser.fields import EmailsField
 from bika.lims.browser.fields.remarksfield import RemarksField
 from bika.lims.browser.widgets import DateTimeWidget
 from bika.lims.browser.widgets import DecimalWidget
@@ -86,6 +59,7 @@
 from bika.lims.interfaces import IBatch
 from bika.lims.interfaces import ICancellable
 from bika.lims.interfaces import IClient
+from bika.lims.interfaces import IDynamicResultsRange
 from bika.lims.interfaces import ISubmitted
 from bika.lims.permissions import FieldEditBatch
 from bika.lims.permissions import FieldEditClient
@@ -112,8 +86,8 @@
 from bika.lims.permissions import FieldEditResultsInterpretation
 from bika.lims.permissions import FieldEditSampleCondition
 from bika.lims.permissions import FieldEditSamplePoint
-from bika.lims.permissions import FieldEditSampleType
 from bika.lims.permissions import FieldEditSampler
+from bika.lims.permissions import FieldEditSampleType
 from bika.lims.permissions import FieldEditSamplingDate
 from bika.lims.permissions import FieldEditSamplingDeviation
 from bika.lims.permissions import FieldEditScheduledSampler
@@ -127,6 +101,32 @@
 from bika.lims.utils import user_fullname
 from bika.lims.workflow import getTransitionDate
 from bika.lims.workflow import getTransitionUsers
+from DateTime import DateTime
+from Products.Archetypes.atapi import BaseFolder
+from Products.Archetypes.atapi import BooleanField
+from Products.Archetypes.atapi import BooleanWidget
+from Products.Archetypes.atapi import ComputedField
+from Products.Archetypes.atapi import ComputedWidget
+from Products.Archetypes.atapi import FileField
+from Products.Archetypes.atapi import FileWidget
+from Products.Archetypes.atapi import FixedPointField
+from Products.Archetypes.atapi import ReferenceField
+from Products.Archetypes.atapi import StringField
+from Products.Archetypes.atapi import StringWidget
+from Products.Archetypes.atapi import TextField
+from Products.Archetypes.atapi import registerType
+from Products.Archetypes.public import Schema
+from Products.Archetypes.references import HoldingReference
+from Products.Archetypes.Widget import RichWidget
+from Products.ATExtensions.field import RecordsField
+from Products.CMFCore.permissions import ModifyPortalContent
+from Products.CMFCore.permissions import View
+from Products.CMFCore.utils import getToolByName
+from Products.CMFPlone.utils import _createObjectByType
+from Products.CMFPlone.utils import safe_unicode
+from zope.interface import alsoProvides
+from zope.interface import implements
+from zope.interface import noLongerProvides
 
 IMG_SRC_RX = re.compile(r'<img.*?src="(.*?)"')
 IMG_DATA_SRC_RX = re.compile(r'<img.*?src="(data:image/.*?;base64,)(.*?)"')
@@ -1449,7 +1449,13 @@ def setResultsRange(self, value, recursive=True):
         for analysis in self.objectValues("Analysis"):
             if not ISubmitted.providedBy(analysis):
                 service_uid = analysis.getRawAnalysisService()
+                # get the default results range from the spec
                 result_range = field.get(self, search_by=service_uid)
+                # check if we have an dynamic results range adapter
+                adapter = IDynamicResultsRange(analysis, None)
+                if adapter:
+                    # update the result range with the dynamic values
+                    result_range.update(adapter())
                 analysis.setResultsRange(result_range)
                 analysis.reindexObject()
 
diff --git a/bika/lims/tests/doctests/DynamicAnalysisSpec.rst b/bika/lims/tests/doctests/DynamicAnalysisSpec.rst
index 9b2ba417fa..2928337e1f 100644
--- a/bika/lims/tests/doctests/DynamicAnalysisSpec.rst
+++ b/bika/lims/tests/doctests/DynamicAnalysisSpec.rst
@@ -168,6 +168,12 @@ Now we hook in our Dynamic Analysis Specification to the standard Specification:
 
     >>> specification.setDynamicAnalysisSpec(ds)
 
+
+The specification need to get unset/set again, so that the dynamic values get looked up:
+
+    >>> sample.setSpecification(None)
+    >>> sample.setSpecification(specification)
+
 The specification of the `Ca` Analysis with the Method `Method A`:
 
     >>> ca_spec = ca.getResultsRange()
@@ -178,6 +184,11 @@ Now let's change the `Ca` Analysis Method to `Method B`:
 
     >>> ca.setMethod(method_b)
 
+Unset and set the specification again:
+
+    >>> sample.setSpecification(None)
+    >>> sample.setSpecification(specification)
+
 And get the results range again:
 
     >>> ca_spec = ca.getResultsRange()
@@ -192,6 +203,11 @@ The same now with the `Mg` Analysis in one run:
 
     >>> mg.setMethod(method_b)
 
+Unset and set the specification again:
+
+    >>> sample.setSpecification(None)
+    >>> sample.setSpecification(specification)
+
     >>> mg_spec = mg.getResultsRange()
     >>> mg_spec["min"], mg_spec["max"]
     (7, 8)
diff --git a/bika/lims/upgrade/v01_03_004.py b/bika/lims/upgrade/v01_03_004.py
index f9abc57930..4ab65c3ea2 100644
--- a/bika/lims/upgrade/v01_03_004.py
+++ b/bika/lims/upgrade/v01_03_004.py
@@ -75,6 +75,10 @@ def upgrade(tool):
     setup.runImportStepFromProfile(profile, "workflow")
     update_workflow_mappings_for_to_be_verified(portal)
 
+    # Unset/set specifications with dynamic results ranges assigned
+    # https://github.com/senaite/senaite.core/pull/1588
+    update_dynamic_analysisspecs(portal)
+
     logger.info("{0} upgraded to version {1}".format(product, version))
     return True
 
@@ -115,3 +119,40 @@ def update_workflow_mappings_for_to_be_verified(portal):
         obj = api.get_object(brain)
         workflow.updateRoleMappingsFor(obj)
     logger.info("Updating role mappings for 'to_be_verified' analyses [DONE]")
+
+
+def update_dynamic_analysisspecs(portal):
+    """Unset/set specifications that have dynamic result ranges assigned
+    """
+
+    # Skip update when there are no dynamic specs registered in the system
+    setup = api.get_setup()
+    dynamic_specs = getattr(setup, "dynamic_analysisspecs", None)
+    if dynamic_specs is None:
+        return
+    if not dynamic_specs.objectIds():
+        return
+
+    logger.info("Updating specifications with dynamic results ranges...")
+    catalog = api.get_tool(CATALOG_ANALYSIS_REQUEST_LISTING)
+    samples = catalog({"portal_type": "AnalysisRequest"})
+    total = len(samples)
+
+    logger.info("Checking dynamic specifications of {} samples".format(total))
+    for num, sample in enumerate(samples):
+        if num and num % 100 == 0:
+            logger.info("Checked {}/{} samples".format(num, total))
+        obj = api.get_object(sample)
+        spec = obj.getSpecification()
+        if spec is None:
+            continue
+        if not spec.getDynamicAnalysisSpec():
+            continue
+
+        # Unset/set the specification
+        logger.info("Updating specification '{}' of smaple '{}'".format(
+            spec.Title(), sample.getId()))
+        sample.setAnalysisSpec(None)
+        sample.setAnalysisSpec(spec)
+
+    logger.info("Updating specifications with dynamic results ranges [DONE]")