Add degauss command for demagnetizing current sensor cores

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

hioki3193/cli.py

@@ -368,6 +368,15 @@ def cmd_integration(meter: Hioki3193, args: argparse.Namespace) -> None:
             print(f"Integrating channels: {status}")
 
 
+def cmd_degauss(meter: Hioki3193, args: argparse.Namespace) -> None:
+    """Degauss (demagnetize) current sensor cores."""
+    channels = args.channels if args.channels else [5, 6]
+    items = ",".join(f"I{ch}" for ch in channels)
+    print(f"Degaussing: {items}")
+    meter.write(f":DEMAg {items}")
+    print("Degauss command sent. Wait for the instrument to finish.")
+
+
 def main() -> None:
     parser = argparse.ArgumentParser(
         description="HIOKI 3193-10 Power Analyzer GPIB Tool",
@@ -439,6 +448,10 @@ examples:
     p_int = sub.add_parser("integration", help="Integration control")
     p_int.add_argument("action", choices=["start", "stop", "reset", "status"])
 
+    # degauss
+    p_demag = sub.add_parser("degauss", help="Degauss (demagnetize) current sensor cores")
+    p_demag.add_argument("channels", nargs="*", type=int, help="Channel numbers (default: 5 6)")
+
     # send
     p_send = sub.add_parser("send", help="Send raw SCPI/GPIB command")
     p_send.add_argument("raw_command", nargs="+", help="Command string (queries auto-detected by '?')")
@@ -455,6 +468,7 @@ examples:
         "efficiency": cmd_efficiency_setup,
         "setup-mppt": cmd_setup_mppt,
         "integration": cmd_integration,
+        "degauss": cmd_degauss,
         "send": cmd_send,
     }