MSA ULTIMA X5000 Gas Monitor
MSA ULTIMA X5000 Gas Monitor Reference Failure
The gas monitor has an out of range measurement, causing the instrument to fault.
- Code
- Reference Failure
- Name
- Reference Failure
- Controller
- MSA ULTIMA X5000 Gas Monitor
- Type
- Sensor fault
- What it does
- Fault: the equipment trips and stops
- Risk
- YELLOW Booth plays by its own rules
- Reset
- Needs a manual reset
- Source
- The manufacturer's manual (subscribers see which manual and page)
Updated November 4, 2026
How to fix it
Subscribers get:
- What to do next, in plain words
- What the manual says to do, and the page it is on
- The step by step check for this problem, one check at a time
- Booking a live video call with Ben, a master booth technician ($250/hr, paid per call)
Questions about this code
What does MSA ULTIMA X5000 Gas Monitor Reference Failure mean?
The gas monitor has an out of range measurement, causing the instrument to fault.
Is MSA ULTIMA X5000 Gas Monitor Reference Failure dangerous?
It is graded yellow: not hard, but a booth does it differently than the gear most techs know, so follow the checks in order.
How do I fix MSA ULTIMA X5000 Gas Monitor Reference Failure?
The manual's fix and the step by step check for this code are in WERCS Diagnose, plans from $49 a month. For help right now, WERCS answers 24/7 at (877) 489-3727.
Other MSA ULTIMA X5000 Gas Monitor codes
Negative Drift · Negative DriftSensor Missing · Sensor MissingBeads Off Fault · Beads Off FaultSensor RAM Error · Sensor RAM ErrorTEDS CRC-16 Error · TEDS CRC-16 ErrorLow Signal Failure · Low Signal FailureRAM Checksum Fault · RAM Checksum FaultSensor FLASH Error · Sensor FLASH ErrorConfiguration Fault · Configuration FaultSensor Heater Fault · Sensor Heater Fault
All 39 MSA ULTIMA X5000 Gas Monitor codes · Every fault code