ULVAC HELIOT Preventive Maintenance Service
We provide scheduled preventive maintenance for ULVAC HELIOT helium mass spectrometer leak detectors, following the maintenance schedule specified in official ULVAC engineering documentation. All maintenance is performed on-site at your facility, anywhere in the world.
Why Preventive Maintenance Matters
The HELIOT vacuum system relies on Viton O-ring seals at 8 critical positions. These seals degrade over time and with temperature cycling. When a seal deteriorates, helium background rises, sensitivity drops, and test results become unreliable. O-ring replacement is the single most important preventive maintenance action for HELIOT equipment.
The manufacturer-specified interval is every 6 months.
Standard 6-Month Maintenance Visit
Our standard preventive maintenance visit covers:
- Pre-service performance baseline — sensitivity measurement, background check, calibration verification
- Viton O-ring replacement at 8 specified positions: internal calibration leak connection, Pirani sensor mount, valve block, test port adapter, ion source assembly, foreline vacuum manifold, inlet port, fore-pump inlet
- IS-BA1 ion source inspection — visual check, filament hours review, performance verification
- Filter replacement — oil mist trap element, vent line filter, cooling fan filters
- Backing pump service check — oil level, filter check, performance assessment
- Turbomolecular pump assessment — vibration check, performance trending
- Calibration verification — internal calibration leak value verified against external reference standard
- Setpoint review — verification that SP1/SP2/SP3 values match your application requirements
- Post-service performance measurement — sensitivity, background, and calibration after maintenance
- Service report — written English report with pre- and post-service values, parts replaced, and recommendations
What We Service Inside the Instrument
Maintenance Schedule
| Task | Interval | Level |
|---|---|---|
| Viton O-ring replacement (8 positions) | Every 6 months | L3 — Service engineer |
| Ion source IS-BA1 inspection / replacement | Every 6–12 months | L3 — Service engineer |
| Oil mist trap element check | Monthly visual | L1 — Operator |
| Vent line filter check | Monthly visual | L1 — Operator |
| Cooling fan filter check | Monthly visual | L1 — Operator |
| Roughing pump oil check | Per pump schedule | L2 — Technician |
| TMP inspection (vibration, performance) | Every 12–24 months | L3 — Service engineer |
| Calibration verification | Before each test session | L1 — Operator |
Parts Used in Our Maintenance Visits
All parts used in our maintenance visits are genuine ULVAC components:
- Viton O-ring set — 8 positions (enquire for current code)
- IS-BA1 ion source cartridge — product code 210004573200
- M1000-KIT-S oil mist trap element — 210006833700
- ZFC-EL-4 vent line filter — 210006833800
- FE-462-2-F4 cooling fan filter (panel) — 210006834300
- 109-1003M40 cooling fan filter (electrical box) — 210006833600
Service Agreements
For facilities operating multiple HELIOT units, we offer structured service agreements covering scheduled 6-month maintenance visits with agreed pricing and priority scheduling. Contact us to discuss a service agreement for your facility.
Contact
Email: mail@ulvacheliot.com
Please include: equipment model(s), serial number(s), quantity of units, your location, and preferred service date. We respond within 1–2 business days.