Mikhail Karnevskiy
--- a/cal_tools/cal_tools/tools.py
+++ b/cal_tools/cal_tools/tools.py
-            print(e)
-            return empty_constant
+            if verbosity > 0:
+                print(e)
+            return empty_constant, metadata
    else:
-        return empty_constant
+        return empty_constant, None
+
+
+def get_constant_from_db(device, constant, condition, empty_constant,
+                         cal_db_interface, creation_time=None,
+                         print_once=True, timeout=30000):
+    data, _ = get_data_from_db(device, constant, condition, empty_constant,
+                               cal_db_interface, creation_time,
+                               print_once, timeout)
--- a/cal_tools/cal_tools/tools.py
+++ b/cal_tools/cal_tools/tools.py


 all_ready_printed = {}
-def get_constant_from_db(device, constant, condition, empty_constant,
+def get_data_from_db(device, constant, condition, empty_constant,
--- a/cal_tools/cal_tools/tools.py
+++ b/cal_tools/cal_tools/tools.py
-            metadata.retrieve(cal_db_interface)
        else:
            metadata.calibration_constant_version = Versions.Timespan(device=device,
                                                                      start=creation_time)
-            metadata.retrieve(cal_db_interface, when=creation_time.isoformat(), timeout=timeout)
+            creation_time = creation_time.isoformat()
+
        try:
-            
-            if constant.name not in all_ready_printed or not print_once:
-                all_ready_printed[constant.name] = True
-                print("{} was injected on: {}".format(constant.name, metadata.calibration_constant_version.begin_at))  
-            return constant.data
+            metadata.retrieve(cal_db_interface, when=creation_time, timeout=timeout)
+            if verbosity > 0:
+                if constant.name not in all_ready_printed or verbosity > 1: