FD-92

Calibration of FD-92

Summary:
A step-by-step tutorial on calibrating your FD-92 gas detector. 

Model: 
FD-92 all versions including FD-92-NH3, FD-92-LEAK, FD-92-FREON

Calibration Frequency: 
At least every 12 months.

Calibration Kit Items Required:

  1. Calibration Gas Bottle
    • Select the corresponding calibration gas for your unique gas detector. To do so, go to the product listing of your gas detector for the recommended calibration gas bottle.
  2. Calibration Gas Regulator (C10)
  3. Tubing
  4. FD-92 Calibration Cap

▶️ Tutorial Calibration Video

 Example: FD-92-NH3

 

Note: Example of Ammonia (FD-92-NH3). Each FD-92 is unique and made to a specific single target gas. Follow this procedure using the recommended calibration gas bottle for your particular target gas.

✅ STEP 1: ZERO Calibration to 0 ppm using Fresh Air.

  1. Power on your gas detector and allow 2 minutes for stabilization in fresh air.
  2. Expose the gas analyzer to fresh air or pure nitrogen for at least 2 minutes. 
  3. If using a N2 gas bottle, use a flow rate of 0.5 LPM.
  4. The gas detector may or may not read precisely 0 ppm. Depending on the model, it may or may not read 0.0 or 0.00 ppm. To zero calibrate and make it read exactly 0, 0.0, or 0.00 ppm, undertake the following steps.
  5. Press the middle OK button to go to the Menu Screen.
  6. Select the Calibration option.
  7. Enter password 11 and the logn press the middle OK button.
  8. Select "Cal. Zero" by pressing the middle OK button.
  9. Once done you will see "Success"
  10. Done! 
  11. In the main display screen, the unit will now read 0 ppm in fresh air.

✅ STEP 2: SPAN Calibration.

  1. Ensure you first undertake a Zero Calibration.
  2. Then, expose the gas analyzer to your calibration reference gas for 2 minutes or until the reading has stabilized. Use a flow rate of 0.5 LPM and connect the gas to the gas detector using the FD-92 calibration cap.
  3. Press the middle OK button to go to the Menu Screen.
  4. Select the Calibration option.
  5. Enter password 11 and the login press the  middle OK button.
  6. Go down to highlight the Calibration Value and change the value to be the same as your reference gas.
  7. Enter the numeric value via the key pad then press green tick.
  8. Move the highlighted orange box to the Calibration box and press OK.
  9. Once done, you will see "Success"
  10. Go back to the main display and confirm the digit value is the same as your reference gas. Done!

✅ 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-90A-CO has a full scale of 1000 ppm. The unit was calibrated to a reference gas of 200 ppm. Then, a PASS range is +/-2% of 1000 ppm = +/- 20 ppm. Therefore, a PASS is between 180 ppm and 220 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.