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- If this is a ramping-down for the first time after a long time (i.e magnet was ramped-up after a long time since it was turned-OFF), then you should verify the magnetic field as the first step.
Skip to the Step #2 if this is not the case. - Verify that the shim PS (the bottom one in the following picture) is powered ON. If not, turn it on and check why it was off.
- Confirm that the main and shim switch heaters are OFF. If not, something is wrong. Also, the two LED bulbs Z1 and ZY-Z2 are OFF (see the bottom module of the above picture).
- Set "74.78 A", using the Presets selector. The ramp rate becomes "0.5 A/m" but it will not matter.
- Press "To Set" and wait until the current becomes the SP and "HOLD". It takes 2.5 minutes.
→ after ~24 minutes → 
Confirm that "Clamped" nor "Quench" is not red (if you can go into the hall).
- Press the Toggle button of the main switch heater. It turns on both the main and shim switch heaters.
When you do this step, you should see the two LED bulbs Z1 and ZY-Z2 are ON.
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- Switch back from the persistent mode, if necessary. ** This step is already done in the above section **
- Set "0.5 A/m" and "63 A".
- Press "To Set" and wait until the current becomes the SP and "HOLD". It takes 24 minutes.
→ after ~24 minutes → 
If you are in the NM4 Hall, and you see that the display shows "Rate Limit" in RED, then wait for a few minutes and observe the strip charts and this module's display.
This indicates that the Mercury-iPS is more cautious with the rate of 'current' and it is adjusted by itself.
After a few minutes, the display should look like the following.
Wait until the VI indicates that it switched to "HOLD"
- Set "1 A/m" and "45 A".
- Press "To Set" and wait until the current becomes the SP and "HOLD". It takes 18 minutes.
- Set "2 A/m" and "0 A".
- Press "To Set" and wait until the current becomes the SP and "HOLD". It takes 23 minutes.
- Press the Toggle button of the main switch heater. It turns off both the main and shim switch heaters.
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