FD-90E (Yellow)

Calibration of FD-90E-YELLOW

Summary:
A step-by-step tutorial on calibrating your FD-90E-YELLOW gas leak detector.  

Model:
FD-90E-YELLOW

Calibration Frequency: 
At least every 12 months.

Calibration Kit Items Required:

  1. Calibration Cap
  2. Calibration Gas Regulator (C10)
  3. Calibration Gas (5000 ppm of methane)

▶️ Tutorial Calibration Video

 

✅ STEP 1: ZERO Calibration to 0 ppm.

  1. Power on the analyzer and wait until the countdown. Ensure this procedure occurs in fresh air or outdoor fresh air.
  2. Before ZERO calibration, please wait another 5 minutes to ensure the thermal equilibrium of the metal oxide semiconducting sensor.
  3. Press the left and right buttons at the same time to go to the main menu.
  4. Select the "gas zero" option, then press "save".
  5. Done! Then go back to the main menu by selecting "ESC".
  6. The main display will now be reading 0 ppm.

✅ STEP 2: SPAN Calibration to 5000 ppm of methane.

  1. Perform this SPAM calibration after a ZERO calibration.
  2. Expose the gas analyzer to the methane 5000 ppm calibration reference gas for 2 minutes or until the reading has stabilized. Use a flow rate of 0.5 LPM and the rubber calibration cap as recommended.
  3. The digital display ppm numbers will rise.
  4. Press the left and right buttons at the same time to go to the main menu.
  5. Select "gas calib" from the Menu Screen.
  6. Press "edit" then enter passcode: 1111. Then press "sure".
  7. Enter the span reference gas value of 5000 ppm and then press "sure".
  8. Press the right button to "save" the span calibration.
  9. Done! Then go back to the main menu by selecting "back".
  10. Remove the calibration cap and close the regulator gas flow.

✅ STEP 3: Verification

  1. Allow the gas detector to stabilize in fresh air for 5 minutes, confirming it reads 0 ppm in fresh air.
  2. Expose the analyzer to the calibration reference gas to verify the calibration and detection repeatability.
  3. If the gas detector reading is within +/- 2% F.S. of the calibration gas value, this is considered a PASS. For example, FD-90E-YELLOW has a full scale of 10,000 ppm. The unit was calibrated to a reference gas of 5000 ppm. Then, a PASS range is +/-2% of 10,000 ppm = +/- 200 ppm. Therefore, a PASS is between 4800 ppm and 5200 ppm. 
  4. Once verified, your unit is properly calibrated and ready for operation.
  5. Don't forget to document the calibration event in your gas analyzer log book. Place a reminder calibration date sticker on the unit for the next calibration event.