INFICON DataFID Portable Flame Ionization Detector for Leak Detection and Repair (LDAR) - Manual (Page 81)

074-578-P1A 81
3. Replace the filter housing.
4. Calibrate all Cal Memories that you are using before continuing operation.
NOTE: Do not operate the DataFID without an inlet filter.
Replacing the Sintered Filter (Exhaust Filter)
Through normal use of the DataFID, the exhaust frit and cap (Part No. A3201116) can become
clogged with fine carbon ash from continuous burning of vapors and gases which exit from the
detector. It is vital that this piece be replaced often and a supply should be kept on hand. One of
the principle reasons this part needs to be changed out is from excess humidity in the air while
the unit is being used. Excess water saturation of the filter element can cause the element to
trap and bind particulates from the burn process more easily and accelerate the clogging
process. It is suggested that the filter be changed at least once a month to maintain data and
machine integrity if sampling is done in a hot and humid condition or when sampling high
concentrations of organic vapors and gases. If the use of the DataFID is infrequent, the filter can
be changed once every six months.
1. Turn off the unit power and close the hydrogen valve.
2. Locate the exhaust frit and cap on the main unit , identified as “Exhaust”. (See
Figure 5)
3. Use the multi-tool to unscrew the old exhaust element counterclockwise and replace
the exhaust element with a new one (Part No. A3201116).
4. The old exhaust frit and cap can be cleaned and reused. Use methanol or alcohol in
an ultrasonic bath.
Calibration
Daily Calibration
The DataFID should be calibrated on a daily basis before use.
It is necessary to calibrate the DataFID at the temperature at which the unit will be used to
minimize the effects of vapor pressure changes with temperature. Performing calibration at the
same temperature allows the calibration gas and the sample gas to have equal ionization in the
detector.
Monthly Quality Check
Calibration of the DataFID as a routine maintenance activity should include measuring the
machine against a known standard of good quality gas, and then comparing the result before
the calibration. This quality check is most commonly known as a "bump test" and helps define
the unit linearity and whether cleaning of the detector collector electrode is necessary. The
unit
’s performance should be within 20% of the calibration level used. This should be performed