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M300EU INSTRUMENT MAINTENANCE
(Addendum to M300EU Manual - P/N 04145)
9. INSTRUMENT MAINTENANCE
The information found in Chapter 9 of the M300E/EM Operators Manual (P/N 04288) is applicable to the M300EU with the
following exception(s):
• The oven temperature should be tracked along with the other parameters listed on Table 9-2 of the
M300E/EM Operators Manual (see Table 9-1 below).
9.1. PERFOMING AN AUTO-REFERENCE MEASUREMENT
AFTER MAINTENANCE
It is very important to manually initiate an A-REF measurement whenever any maintenance is performed on the
M300EU, particularly if that maintenance is involves:
• Opening the top cover or the front panel while the instrument is making A-REF measurements.
• Opening the top cover or the front panel at any time when the next ACAL scheduled A-REF
measurement cycle is < 2 hours away.
• Turning off the analyzer at any time when the next ACAL scheduled A-REF measurement cycle is < 2
hours away.
This should be done no sooner than 2 hours after the M300EU has been operating with the front panel / top
cover properly closed and sealed. One this manual A-REF measurement is performed; the analyzer will discard
any erroneous A-REF ratios that may have been recorded before the instrument’s oven temperature had a
chance to re-stabilize.
USER NOTES:
05514 Rev A1 45