8
provide a dedicated ‘Flow Check’ test, the following calculation may be used to determine the
deviation value from the ‘Forward Flow’ test result:
Equation 1
Deviation Value from Forward Flow Test Result
Note: A low measured flow value may indicate the presence of moisture in the internal capillary.
In this case, it is recommended to blow clean, dry air at 2 bar (29 psi) pressure for 2 hours
through the Palltronic Flow Check II unit.
If test results are consistently outside the 5% limit, please contact your local Pall office or
distributor as either the Palltronic Flow Check II unit or Palltronic integrity test instrument may
require service and/or calibration.
4.
Maintenance
The Palltronic Flow Check II unit requires no maintenance except that the battery should be
changed when required.
4.1
Changing the Battery
Open the black cover of the battery compartment by using a coin or a screwdriver.
Remove the old battery and replace it by a new 1.5 V battery type AA (LR06/AM-3)
The negative (–) terminal of the battery should be inserted into the unit.
Close the battery compartment.
After changing the battery the ‘Battery failed’ message can be erased by pressing the ‘Start’
button for more than 5 seconds to switch the unit off.
Used batteries should be discarded in accordance with relevant local and national regulations.
The battery will be replaced as part of a standard service and calibration at a Pall facility.
5.
Troubleshooting
5.1
Preliminary Troubleshooting
If any difficulties are experienced with the value measured through the Palltronic Flow Check II
unit, please try the following:
• If the display cannot be activated by pressing the button on the right side, then replace the
battery
• It is possible to operate the Flow Check II unit without the display switched on or
with no battery installed. In this case the atmospheric pressure should be
measured using an independent method of measurement. The reference value of
flow shown on the label should then be corrected by multiplying by the correction
factor given in Appendix A.
• Check that the Palltronic Flow Check II unit is correctly connected to the integrity test
instrument
• Check if the environmental temperature is out of the recommended range between 18 °C
and 25 °C.
• Check that the integrity test instrument is correctly supplied with the appropriate air supply
and that the air supply is oil and water free
Deviation (%) =
Measured flow – Expected flow
Expected flow
x 100
