MKS 651C, Instruction Manual, Page: 167 / 172

General Information Unpacking Checklist
Page 3 of 8
General Information
Unpacking Checklist
This Firmware Revision Kit comes with the following items:
•
FIRMWARE EPROM (U6) - Rev. 1.9x
For units with a display:
MKS part no. 114547-P1
For units without a display: MKS part no. 114547-P2
•
Instructions on how to upgrade to EPROM version 1.9x
(this document, MKS part no. 122094-P1)
Downward Compatibility
The 651C and 655A version 1.9x firmware is completely compatible with the 651C and 655A
version 1.8x firmware.
Returning the Type 651/655 Unit for Firmware Revision
Standard maintenance services are available at all of our regional MKS Calibration and Service
Centers listed on the inside back cover of your instruction manual. Should you prefer to have
MKS upgrade your Type 651/655 instrument, contact any authorized MKS Service Center.
Before shipping the instrument to MKS, please obtain an ERA Number (Equipment Return
Authorization Number) from the MKS Service Center. The ERA Number expedites handling
and assures proper servicing of your instrument. Please refer to the inside of the back cover of
your instruction manual for a list of MKS Calibration and Service Centers.
Warning
All returns to MKS Instruments must be free of harmful,
corrosive, radioactive, or toxic materials.