FD-90A-O2

Calibration of FD-90A-O2

Summary:
A step-by-step tutorial on calibrating your FD-90A-O2 gas analyzer.

Model:
FD-90A-O2

Calibration Frequency: 
At least every 12 months. 

Calibration Kit Items Required:

  1. Calibration Gas (N2)
  2. Calibration Gas Regulator (C10)
  3. Tubing
OXYGEN Detector - Forensics Detectors

▶️ Tutorial Calibration Video

 

✅ STEP 1: SPAN Calibration to 20.9% oxygen in fresh air.

  1. Power on the detector and allow 60 seconds for stabilization in fresh air.
  2. Check the reading: No calibration is needed if it's within ±0.1% of 20.9%.
  3. For calibration to precisely 20.9% undertake the following.
  4. Press middle button to go to the MENU selection.
  5. Select "Gas Calib" from the Menu Screen
  6. Enter passcode: 8888 then press NEXT
  7. Press NEXT to confirm 20.9% calibration value.
  8. Press the right button to "SAVE" the 20.9% calibration value.
  9. The detector is now calibrated to 20.9% oxygen in fresh air.

✅ STEP 2: ZERO Calibration to 0.0% oxygen using Nitrogen Gas.

  1. Expose the gas detector to 100% Nitrogen Gas for at least 2 minutes. The gas analyzer will approach 0.0%.
  2. Ensure you use a flow rate of 0.5 LPM.
  3. Press middle button to go to the MENU selection.
  4. Select "GasZero" from the Menu Screen.
  5. Press the "SAVE" button to confirm the zero value.
  6. Go back to the main display to confirm a reading of 0.0%.
  7. The analyzer is now zero-calibrated.

✅ STEP 3: Verification

  1. Allow the oxygen detector to stabilize in fresh air for 5 minutes, confirming it reads 20.9%.
  2. Once verified, your unit is properly calibrated and ready for operation.
  3. Don't forget to document the calibration event in your gas detector log book. Place a reminder calibration date sticker on the unit for the next calibration event.