Burn-off oven guide
Burn-off oven chart paper and pens
Out of chart paper? Pen ran dry? Here's how to get the right replacements for your burn-off oven's recorder — and why a lot of shops are done buying them.
The short answer
- Match the chart number. It's printed on the old chart, usually near the center or the edge. Order that exact number.
- Match the range and rotation. Burn-off oven charts typically cover up to 2,000°F or more, on a 24-hour or 7-day rotation. The wrong range puts the line in the wrong place.
- Match the pen to the recorder model, not just the color. Pens are made for specific recorder brands and models.
- Keep a spare pen and a month of charts on the shelf. A dry pen or an empty chart box means a gap in your record.
Why your burn-off oven has a chart recorder
The chart is your proof that the afterburner stayed hot enough. Under the EGLE general permit for natural gas-fired burn-off ovens, the afterburner has to hold at least 1,400°F for at least half a second, the temperature has to be monitored continuously and recorded at least once every 15 minutes, and the records have to be kept for five years. Most individual burn-off oven permits in Michigan have similar conditions. For a lot of shops, the circular chart is how they meet that.
See the full list in our guide to Michigan burn-off oven permit records.
Where paper charts go wrong
Paper charts work until they don't. These are the problems we see most:
- The pen runs dry. The chart turns all day and records nothing. Nobody notices until the chart comes off.
- The chart doesn't get changed. Lines from two days land on top of each other and neither is readable.
- The power blips. The recorder stops or the clock drifts. In one 2023 Michigan violation notice, a shop had no afterburner temperature records for 16 days because the monitoring wasn't reset after a power outage. The state only found out when it asked for the records after odor complaints.
- A low afterburner is found too late. The chart shows the dip — days or weeks later, when someone finally looks.
- Five years of paper. A daily chart is about 1,800 charts per oven to store, keep dry and find on request.
The real cost isn't the paper
Charts and pens are cheap. The cost is everything around them: someone changing the chart every day, someone filing it, a box of charts nobody can search, and the day an inspector asks for a specific week. A missing week of records can turn into a violation notice that needs a written response, corrective actions and dates.
Stop buying chart paper
OvenArchive keeps your burn-off oven's temperature record automatically — no charts, no pens, nothing to change. It tells you right away if the afterburner runs low, and it tells you if the record ever stops, so a dry pen or a power blip never becomes a missing week. Five years of records stay searchable and ready for the inspector.
It works with burn-off ovens that have chart recorders today. We'll tell you what your oven needs when we look at it.
Common questions
How do I find the right chart paper for my burn-off oven recorder?
Use the chart number printed on your current chart and match the temperature range and rotation (24-hour or 7-day). If the number is worn off, the recorder's make and model, usually on a label inside the door, will tell your supplier which chart fits.
How long do I need to keep burn-off oven charts?
Under Michigan's general permit for natural gas-fired burn-off ovens, temperature records must be kept for five years. Check your own permit, since individual permits can differ.
How often does a burn-off oven's afterburner temperature need to be recorded?
Michigan's general permit requires the afterburner temperature to be monitored continuously and recorded at least once every 15 minutes.
Do I have to use paper charts?
Burn-off oven permits generally require that the afterburner temperature is continuously monitored and recorded; they don't usually require paper. Read the monitoring and recordkeeping conditions in your own permit, and ask EGLE if you're unsure.
What happens if my chart recorder misses a day?
Missing temperature records can be cited as a permit violation. Note the date, the cause and what you did to fix it in your malfunction and maintenance records, and fix the cause so it doesn't repeat.
This guide is general information, not legal advice. Your own air permit is what governs your oven. Questions about your permit go to EGLE's Air Quality Division.