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Operator Feed
Real questions. Real solutions. Built by operators, for operators.
Pumps" Solved
Pump 2 keeps tripping the OL relay - even after reset.
Checked voltage, looks balanced.
Running a 15 HP submersible on a lift station. OL relay trips
within 30 seconds of starting in Manual. Power event yesterday. Amps seem high but
we don't have a clamp meter handy.
SCADA SCADA
Anyone using Ignition SCADA for a small water system? Looking
for advice on UDT tag structures.
Upgrading from legacy HMI to Ignition 8.1. Trying to organize
UDTs for a 3-well water system with 2 tanks. Love to see how others structured for
regulatory reporting too.
Treatment" Solved
Sudden DO crash in aeration basin - MLSS fine but effluent
TSS climbing post-outage
2-hour power outage. Aeration came back but DO stuck at 1.1
even at 100% blowers. MLSS at 3,200 mg/L. TSS went from 8 to 22 mg/L over 12 hours.
Anyone seen this post-power scenario?
" Instruments
Hach LDO probe reading 1.2 mg/L below portable YSI -
calibration issue or sensor drift?
Online DO consistently reading ~1.2 below portable YSI after
membrane change. Recalibrated twice using air saturation. Wondering if temp
compensation differs or membrane needs more soak time.
Blowers
Rotary lobe blower vibrating hard on startup - bearing wear
or air filter restriction?
2017 Roots blower, 75 HP. Heavy vibration only during startup
for ~10 seconds then smooths out. Filters are 3 months old. RPM normal per VFD.
Worth checking coupling alignment first?
" Maintenance
What's your PM schedule for submersible pumps at lift
stations?
Building a solid PM program for 6 lift stations. Currently
annual inspections + runtime hours. Want to add oil inspections, amp checks,
vibration baselines. What intervals and tracking software do you use?