Industrial Scientific Radius BZ1 Area Monitor
Industrial Scientific Radius BZ1 Area Monitor code -OR: Negative over-range
A negative over-range event occurred on the gas detector, triggering an alarm in the area.
- Code
- -OR
- Name
- Negative over-range
- Controller
- Industrial Scientific Radius BZ1 Area Monitor
- Type
- Sensor fault
- What it does
- Warning: the equipment keeps running and flags a problem
- Risk
- GREEN In your wheelhouse
- 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
- Which manufacturer manual it comes from, linked
- 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 Industrial Scientific Radius BZ1 Area Monitor code -OR mean?
A negative over-range event occurred on the gas detector, triggering an alarm in the area.
Is Industrial Scientific Radius BZ1 Area Monitor code -OR dangerous?
It is graded green: in a working tech's wheelhouse with standard tools and low risk.
How do I fix Industrial Scientific Radius BZ1 Area Monitor code -OR?
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 Industrial Scientific Radius BZ1 Area Monitor codes
OR · Positive over-range event408 · System errorERR · Sensor errorOFF · Sensor offTWA · TWA eventSTEL · STEL eventMAN DOWN · Peer man down
All 15 Industrial Scientific Radius BZ1 Area Monitor codes · Every fault code