PerkinElmer Photovac MicroFID, User Manual

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MicroFID Software Manual
8. Press ENTER and MicroFID sets its sensitivity.
NOTE: Readings may fluctuate slightly as the gas bag empties. Do not
allow the MicroFID to evacuate the bag completely.
9. When MicroFID’ s display reverts to normal, it is calibrated
and ready for use. Remove the span gas bag from the inlet.
10. Press the ALARM key and enter the alarm level for the
selected Cal Memory.
Programming the Cal Memories
MicroFID has 10 Cal Memories and can be calibrated with 10
different span gases or response factors if desired.
To program the Cal Memories:
1. Prepare the bags of calibration gas as outlined in Preparing
the Calibration Gas Bag and the Zero Air Bag on page 66.
Use a different gas bag and gas bag adapter for each
concentration and for each type of calibration gas.
You can use the same gas bag to zero all the Cal Memories;
however, you must refill the bag for each Cal Memory.
2. Press CAL and select the desired Cal Memory (1 to 10)
with the ARROW keys.
3. Enter the desired response factor and press ENTER. See
Response Factors on page 149.
NOTE:
It does not matter which Cal Memory is selected or which response
factor is entered, MicroFID’ s response is not specific to any one
compound. The reading displayed represents the total
concentration of all ionizable compounds in the sample.
4. Select the Low Range or High Range and press ENTER.
The range will depend on the concentration of the
calibration gas. Use Low range if you are sampling
concentrations between 0.5 and 2000 ppm (methane
equivalents). Use High Range if you are sampling
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