
You have decided to purchase theTRELOCK
bike computer FC 520 (uni-base),
FC 530 (uni-base) or FC 535 (night-light
base) and, as such, your choice is an
excellent one. Your new bike computer is
easy and convenient to operate thanks to
the visual guidance system and large monobutton typical of TRELOCK products. Please
read through this manual prior to your initial
usage of the computer.
36

Contents
1. Scope of supply
38
2. Activation of bike computer 39
3. Insertion of night-light base battery 39
4. Assembly/Installation 40
5. Display design and operating principle 45
6. General default settings 46
7. Main menus 55
8. Training 63
9. Additional information
and instructions
63
37

3. Insertion of night-light base battery
Lithium Battery CR2032
When supplied to the customer, the
battery has already been inserted into the
bike computer. In order to activate the
computer, the red plastic fl ag must fi rst be
removed. Turn the battery compartment
cap on the bottom of the computer in an
anti-clockwise direction and pull the fl ag
out. Then turn the cap fi rmly back in place.
2. Activation of bike computer
The display for your bike computer is fed
via a battery in the night-light base. In order to insert this battery, use a coin to turn
the battery compartment cap in an anticlockwise direction and insert the battery
with the + sign pointing upwards (see fi g.).
Then turn the cap fi rmly back in place.
3.1 FC 535
39

4. Assembly/Installation
By activating the computer, you automatically access the “General Settings” in the
“Set” (SET) menu. How you can change
the general settings is described under
6.1. Should you wish to make changes to
the general settings at a later date, you
can access the “Set” (SET) menu by pressing the MODE button for the appropriate
number of times and then pressing and
holding the SET and MODE buttons for
approx. 3 sec.
3.2 Information on initial operation
4.1 Assembly/Installation
of handlebar bracket
40

4.4 Assembly/Installation
of sensor
43

4.5 Assembly/Installation of magnet
4444