A generator running with hydrogen purity at 97% and one running at 90% look identical on the control room screen until someone actually reads the analyzer during the round. That ten-point gap changes windage loss, cooling efficiency, and the risk profile of the whole machine — and it only shows up if purity, stator water conductivity, and brush gear condition get checked in a fixed sequence every shift, not glanced at when there's time. Sign up to see how a digital generator round runs on your own units.
Why It Matters
A generator failure rarely starts as a failure. It starts as hydrogen purity drifting down over three shifts, stator cooling water conductivity creeping up past the alarm band, or a brush showing early wear that nobody logged twice in a row. Each of these is visible on a round if the operator checks the same points in the same order every time. A missed reading isn't a gap in paperwork — it's a warning sign that never reached anyone who could act on it.
What A Complete Generator Round Actually Covers
Five checkpoints make up a proper round. Skip one and the sign-off still looks complete while that system runs unmonitored until the next shift.
Hydrogen Purity
Purity percentage, gas pressure, and dew point checked against the analyzer, not estimated from the last known good reading
Stator Water
Conductivity, flow rate, and inlet temperature logged against baseline to catch cooling degradation early
AVR
Voltage regulation response, field current, and alarm history reviewed for any excursion since the last round
Exciter
Bearing temperature, vibration, and rotating diode health checked for early signs of imbalance or overheating
Brush Gear
Brush wear, spring tension, and slip ring surface condition visually inspected against the replacement threshold
CMMS Sign-Off
Every reading timestamped and attributed to the operator, with out-of-range values flagged automatically
Walking The Round In Order
1
Start With Hydrogen Purity
Read the analyzer first, since a low purity reading changes how the rest of the round's cooling-related checks should be interpreted.
2
Check The Stator Water Skid
Log conductivity and flow while the hydrogen reading is still fresh, so any correlation between gas and cooling water shows up in the same round.
3
Review The AVR Panel
Confirm regulation response and field current, and check the alarm log for any excursion that occurred since the previous round.
4
Walk The Exciter And Brush Gear
Take bearing readings by hand and inspect brush wear and slip ring condition visually, not by memory of the last shift's numbers.
5
Close Out In The CMMS
Sign off the round digitally so every reading is timestamped, and let the system flag anything outside range to the next shift automatically.
A Round That Flags Problems Before The Handover
Sign up for a free trial to build your generator round checklist in minutes, or book a demo to see how out-of-range readings get flagged to the next shift automatically.
Where Generator Rounds Break Down
Purity Read From Trend, Not Live Analyzer
A "same as yesterday" entry replaces the actual reading, and a slow purity drop never gets caught
Stator Conductivity Skipped Under Time Pressure
A rushed round drops the water skid check first, and cooling degradation runs unnoticed for weeks
Brush Wear Assumed, Not Inspected
A brush nearing its replacement threshold goes unreported because nobody physically checked it that shift
AVR Alarm Log Not Reviewed
A voltage excursion from the previous shift stays buried in the panel history instead of getting flagged
Paper Sheets With No Timestamp
Without a timestamp attached to each reading, nobody can tell how long a warning sign was sitting there
Round Order Changes Shift To Shift
Without a fixed sequence, comparing today's readings against yesterday's stops being reliable
Frequently Asked Questions
Q
Why does hydrogen purity matter so much on a generator round?
Purity below the target band increases windage loss and reduces cooling efficiency, which raises winding temperature over time. Checking it live against the analyzer, rather than assuming it matches the previous shift, is what catches a slow leak or contamination before it becomes a trip.
Q
How is a digital round different from a paper log for the generator?
A paper sheet records that a check happened. A digital round in a CMMS timestamps each reading, attributes it to the operator, and can flag out-of-range values automatically so the next shift sees the exception without hunting through the log.
Q
Can the checklist be adjusted for a specific generator type?
Yes. The five core checkpoints apply broadly, but fields like cooling method, exciter type, or brush gear configuration can be set per unit so the round matches the actual machine on site.
Turn The Clipboard Round Into A Timestamped Record
Oxmaint builds your daily generator round into a mobile checklist that captures hydrogen purity, stator water, AVR, exciter, and brush gear readings with a timestamp on every entry, and flags exceptions before they reach the next shift. Sign up for a free trial to set up your first round, or book a demo to see it against your own generator configuration.
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