RGA Cart Calibration

This document will show you how to calibrate an MKS RGA device through 'Process Eye Professional'. Calibration will be needed when the collected data shows to much noise >46 AMU, not defining 'Baseline-zero' accurately. When baseline-zero is not accurate, data in linear mode will show peaks beneath y-axis 0, after >46 AMU. Use Figure 1 as reference.

Figure 1. RGA Recall Screen of Cart #3 Data

Figure 2. Leak Valve 

Calibration Guide

Initial Prep Guide:

1. Gather equipment needed
   1. Leak valve
   2. Wrenches 
   3. Nitrogen tubing line
   4. Relevant Hardware
2. Ensure Nitrogen Dewar is full, and/or is at least more than half full.
3. Close-off RGA section with its respective valve
   1. Leaving it under vacuum
4. Close-off turbo/roughing pump section with respective valve
   1. Leaving it under vacuum
5. Connect nitrogen line to inlet valve with pressure relief valve
   1. Allow approximately 5 minutes for system to be backfilled with nitrogen
6. Remove blank from RGA cart hose, and replace with leak valve (Reference Figure 2)
   1. Ensure nitrogen is flowing through the system before starting this step!
   2. Ensure leak valve is tightly closed before placing onto hose
7. Once leak valve is tightly sealed/connected to hose, let the system backfill with nitrogen again
   1. Make the connection to the leak valve at the end of the hose, making sure to tighten bolts all the way until metal to metal contact is made.
   2. Backfill for approx. 3-4 minutes
8. Remove nitrogen line from current position and relocate to it respective spot on the leak valve
   1. Let backfill for 2-3 minutes

Software Guide:

1. Log in to computer
2. Go into 'Process Eye Professional' 
3. Click on 'Recipe List'
4. Click on 'Easy View'
5. The RGA connected to computer through ethernet will have a distinct filled in symbol to its left. 
   1. This will bring up a tab inside of Process Eye
6. O

Related articles

• Page:
  RGA Calibration
• Page:
  Computer Recognition of RGA