5 Calibration information5.7. Additional calibration instruction, IRB44003753HAC020993-001 Revision: G© Copyright 2004-2008 ABB. All rights reserved.5.7. Additional calibration instruction, IRB4400InstrauctionBefore updating the revolution counters (coarse calibration) on IRB 4400, the stainless steelmetal ring on axis 4 need to be removed.Illustrationxx0600003124A Upper armB Stainless steel ringC hose clampAB C