Fumpa bike pumps include a recalibration program which you can use to reset the unit’s inbuilt digital pressure gauge should you believe it to no longer be accurate.
Please note: before starting the recalibration program on your pump, make sure you have a tyre which you have confirmed is inflated to 35 psi. This may be a car tyre which you have inflated at a trusted service station, or another bike tyre which you have confirmed with a pressure gauge is inflated to 35 psi. You may wish to check the accuracy of this at your local bike shop using their gauge. If you do not have a reference tyre at 35 psi available do not proceed with recalibrating your Fumpa
Step 1
Switch off the Fumpa by holding down the minus and plus buttons at the same time for 2 seconds.
Step 2
Switch the pump back on, in recalibration mode by holding down all three top-plate buttons at the same time: the minus, play and plus buttons together
Step 3
Your Fumpa will start up in recalibration mode enabling you to reset it with two reference points: 0 psi and 35 psi.
The display will read: “ ReCal? – YES + NO “
Press the plus button now to exit the recalibration program and restart the unit.
Or press the minus button to proceed with recalibrating your Fumpa.
Step 4
After pressing the minus button, the display will read: “0 psi cal: Press – for YES”
Press the minus button now with nothing attached to the nozzle to reset the 0 psi value for the Fumpa.
Step 5
The display will now read: “ 35 psi cal: Press – for YES ”
Attach your pump’s nozzle to your reference tyre which has been inflated accurately to 35 psi. Press the minus button to proceed. This will recalibrate your Fumpa OG’s internal digital gauge to the 35 psi value of the tyre.
Your Fumpa will now switch itself off and you can restart it and use it as normal.