Differences

This shows you the differences between two versions of the page.

--- playground:change [2012/02/07 14:54] – 132.235.40.1
+++ playground:change [2026/06/25 16:12] (current) – external edit 127.0.0.1
@@ Line 4: / Line 4: @@
   - Switch OVERVOLTAGE PROTECTION to DISABLE.
   - Switch the control mode to GVM.
-  - Turn the CONTROL GAIN to zero.
+  - Slowly turn the CONTROL GAIN to zero while watching the grid voltage.  If the grid voltage rises above -5 volts, reduce the CHARGING VOLTAGE to keep the grid voltage less than -5 volts, then continue reducing the CONTROL GAIN to zero.
-  - To go to a higher energy move the CORONA PROBE POSITION "OUT" while raising the CHARGING VOLTAGE.  **__NEVER__** allow the GRID VOLTAGE to go more negative than -10 VDC during this operation.
+  - To go to a higher energy move the CORONA PROBE POSITION "OUT" while raising the CHARGING VOLTAGE.  **__NEVER__** allow the GRID VOLTAGE to go more negative than -5 VDC during this operation.
-  - To go to a lower energy move the CORONA PROBE POSITION "IN" while lowering the CHARGING VOLTAGE.  **__NEVER__** allow the GRID VOLTAGE to go more negative than -10 VDC during this operation.
+  - To go to a lower energy move the CORONA PROBE POSITION "IN" while lowering the CHARGING VOLTAGE.  **__NEVER__** allow the GRID VOLTAGE to go more negative than -5 VDC during this operation.
   - Set the TERMINAL VOLTAGE Dial to the desired value. The dial is 2 turns per MV (set the dial to twice the GVM you want). You may have to add some upcharge after setting the dial.
   - Raise the CONTROL GAIN to 2-3 for low current beams, around 5 for high current beams. The system is now controlling in GVM mode.