Iris (LC/MS)

The Iris voltage affects ions of all masses in a similar manner.

Minimum

Maximum

Default

Typical

-400

400

350 (positive ions)

0 (negative ions)

350 (positive ions)

0 (negative ions)

During manual tuning, the Iris voltage can be ramped to find an optimum value. Ramp defaults and limits are:

Default (volts)

Limits (volts

Start (From)

-150

-400 to (Stop - Step)

Stop (to)

350

(Start + Step) to 400

Step Size (by)

5

1 to (Stop - Start)