cleanups

Author: prathameshnium

Keithley_2400/Backends/IV_K2400_Loop_Backend_v10.py

@@ -86,7 +86,7 @@ def IV_Measure(cur):
         sleep(1)
         current_values.append(cur * 1e-6)  # Use the actual sourced value
         Volt.append(v_meas)
-        print(f"{cur * 1e-6:.3e} A  {v_meas:.4f} V")
+        print(f"{cur * 1e-6:.3e} A  {v_meas} V")
         i += 1
 
     print("In loop 1")

Keithley_2400/RT_K2400_L350_T_Control_GUI_v3.py

@@ -303,7 +303,7 @@ def create_widgets(self):
         font_title_main = ('Segoe UI', self.FONT_BASE[1] + 4, 'bold')
         ttk.Label(
             header,
-            text=f"K2400 & L350: R-T Sweep (T-Control)",
+            text="K2400 & L350: R-T Sweep (T-Control)",
             style='Header.TLabel',
             font=font_title_main,
             foreground=self.CLR_ACCENT_GOLD).pack(

Keithley_2400/RT_K2400_L350_T_Sensing_GUI_v4.py

@@ -185,7 +185,7 @@ class RT_GUI_Passive:
 
     def __init__(self, root):
         self.root = root
-        self.root.title(f"K2400 & L350: R-T (T-Sensing)")
+        self.root.title("K2400 & L350: R-T (T-Sensing)")
         self.root.geometry("1600x950")
         self.root.minsize(1400, 800)
         self.root.configure(bg=self.CLR_BG_DARK)

Keithley_2400_Keithley_2182/IV_K2400_K2182_GUI_v3.py

@@ -291,7 +291,7 @@ def create_widgets(self):
 
         ttk.Label(
             header,
-            text=f"I-V Sweep (K2400 + K2182)",
+            text="I-V Sweep (K2400 + K2182)",
             style='Header.TLabel',
             font=font_title_main,
             foreground=self.CLR_ACCENT_GOLD).pack(
@@ -565,8 +565,9 @@ def _measurement_worker(self):
         """Worker thread function to perform the measurement."""
         try:
             current_setpoint = self.current_points[self.current_step_index]
-            self.root.after(0, lambda: self.log(
-                f"--- Setting current to {current_setpoint:.3e} A ({self.current_step_index + 1}/{len(self.current_points)}) ---"))
+            log_msg = (f"--- Setting current to {current_setpoint:.3e} A "
+                       f"({self.current_step_index + 1}/{len(self.current_points)}) ---")
+            self.root.after(0, lambda: self.log(log_msg))
             self.root.after(0, lambda: self.ax_main.set_title(
                 f"Measuring at {current_setpoint:.3e} A..."))
             self.root.after(0, lambda: self.canvas.draw_idle())

Keithley_2400_Keithley_2182/RT_K2400_2182_L350_T_Sensing_GUI_v2.py

@@ -300,7 +300,7 @@ def create_widgets(self):
         header.pack(side='top', fill='x')
         ttk.Label(
             header,
-            text=f"K2400/2182 & L350: R-T (T-Sensing)",
+            text="K2400/2182 & L350: R-T (T-Sensing)",
             style='Header.TLabel',
             font=font_title_main,
             foreground=self.CLR_ACCENT_GOLD).pack(

Keithley_6517B/High_Resistance/Backends/IV_K6517B_Simple_Backend_v10.py

@@ -154,7 +154,7 @@ def plot_results(data):
     print(f"Data saved successfully to '{filename}'")
 
 except VisaIOError:
-    print(f"\n[VISA Connection Error]")
+    print("\n[VISA Connection Error]")
     print(f"Could not connect to the instrument at '{VISA_ADDRESS}'.")
     print("Please check the address, cable connections, and if the instrument is on.")
 except ValueError:

Keithley_6517B/High_Resistance/IV_K6517B_GUI_v11.py

@@ -176,7 +176,7 @@ def initialize_instruments(self, parameters):
         except VisaIOError as e:
             print(f"  [VISA Connection Error] Could not connect. Details: {e}")
             raise ConnectionError(
-                f"Could not connect to Keithley 6517B.\nCheck address and connections.") from e
+                "Could not connect to Keithley 6517B.\nCheck address and connections.") from e
         except Exception as e:
             print(f"  [Unexpected Error] during initialization. Details: {e}")
             raise e
@@ -445,11 +445,12 @@ def create_info_frame(self, parent):
                 justify='center')
 
         institute_font = ('Segoe UI', self.FONT_SIZE_BASE + 1, 'bold')
-        ttk.Label(
+        info_label = ttk.Label(
             frame,
             text="UGC-DAE Consortium for Scientific Research",
             font=institute_font,
-            background=self.CLR_BG_DARK).grid(
+            background=self.CLR_BG_DARK)
+        info_label.grid(
             row=0,
             column=1,
             padx=10,

Keithley_6517B/Pyroelectricity/Backends/Poling_K6517B_Backend_v10.py

@@ -1,52 +1,54 @@
 # -------------------------------------------------------------------------------
 # Name:        Keithley 6517B Poling
-# Purpose:
-#
+# Purpose:     Apply a poling voltage to a sample.
 # Author:      Prathamesh K Deshmukh
-#
 # Created:     03-03-2024
-
-# updates: V1.3
+# Updated:     22-11-2025 (Refactored for robustness)
 # -------------------------------------------------------------------------------
 
 import time
 from pymeasure.instruments.keithley import Keithley6517B
 
 
-try:
-    keithley = Keithley6517B("GPIB0::27::INSTR")
-    time.sleep(0.5)
-    # keithley.apply_voltage() # Sets up to source current
-    # keithley.source_voltage_range = 20 # Sets the source voltage
-    # range to 200 V
-    # keithley.source_voltage = 20 # Sets the source voltage to 20 V
-    time.sleep(0.5)
-    # keithley.enable_source() # Enables the source output
-    time.sleep(0.5)
-    keithley.source_voltage = 100
-    # keithley.measure_resistance() # Sets up to measure resistance
-    # keithley.ramp_to_voltage(10) # Ramps the voltage to 50 V
-    # print(keithley.resistance) # Prints the resistance in Ohms
-    time.sleep(20)
-    print(f'Current is {(keithley.current)}')
-
-    # and disables outpu
-except Exception as e:
-    print(f"error with Keithley6517B  : {e}")
-
-except KeyboardInterrupt:
-    # keithley.source_voltage = 0 # Ramps the voltage to 50 V
-    keithley.shutdown()  # Ramps the voltage to 0 V
-    print("\n Poling stopped...")
-
-    time.sleep(0.5)
-    keithley.clear()
-    time.sleep(0.5)
-    keithley.reset()
-
-    keithley.shutdown()  # Ramps the current to 0 mA and disables output
-
-
-except Exception as e:
-    print(f"error with keithley : {e}")
-    keithley.shutdown()
+def main():
+    """
+    Connects to a Keithley 6517B, applies a fixed voltage for a duration,
+    and then safely shuts down.
+    """
+    keithley = None
+    try:
+        # Initialize and configure the instrument
+        keithley = Keithley6517B("GPIB0::27::INSTR")
+        time.sleep(0.5)
+
+        # Apply a poling voltage
+        keithley.source_voltage = 100
+        keithley.enable_source()
+        print("Source enabled. Applying 100V for poling.")
+        time.sleep(1)
+
+        # Wait for the poling duration, periodically checking current
+        print("Waiting for poling to complete (20s)... Press Ctrl+C to stop early.")
+        for i in range(20):
+            time.sleep(1)
+            # You can uncomment the next line to monitor current during poling
+            # print(f"  -> Time: {i+1}s, Current: {keithley.current:.3e} A", end='\r')
+
+        print(f"\nPoling complete. Final current: {keithley.current:.3e} A")
+
+    except KeyboardInterrupt:
+        print("\nPoling stopped by user (Ctrl+C).")
+    except Exception as e:
+        print(f"An error occurred with the Keithley 6517B: {e}")
+    finally:
+        # Guaranteed shutdown logic
+        if keithley:
+            print("Ramping down voltage and shutting down source...")
+            keithley.shutdown()
+            print("Source is off.")
+            # Optional: Reset the instrument to default state
+            keithley.reset()
+
+
+if __name__ == "__main__":
+    main()