CALIBRATION
Calibration parameters are
fine-tuning values according to which the software calculates and adjusts the
current to the electromagnetic brake so that desired pedalling resistance is
obtained. Because each unit is calibrated in the production, the parameters
compensate mechanical and electrical differences caused by component and
assembly tolerances between different units.
The software stores the
calibration parameters in two separate places:
- To the user interface's flash -memory
- To the EEPROM -memory located on the lower power board. (lower power board memory referred as "EEPROM")
Storing parameters in two separate places
facilitates repairing of a defective product. The need of re calibrating the
brake system can in most of the cases be avoided by restoring the original
parameters from either memory. Calibration parameters are also written in the
production on a label located on the product frame post near lower board.
SERVICE MENU CALIBRATION FUNCTIONS
NAME
|
FUNCTION
|
Save parameters
|
Saves all edited data to
EEPROM
|
Restore parameters
|
Copies brake calibration
parameters from EEPROM to user interface. The
parameters will be used
only until next start-up, unless separately saved in the
memory with 'Save'
function.
|
Odometer
|
|
Calibrate brake
|
Brake can be calibrated
with a dynamometer following the instructions on the screen (calibration at
100 and 60 RPM)
|
Edit calibration
|
Manually edit brake
calibration parameters. Edited parameters must be saved in the memory using
the 'Save parameters' function before exiting the ‘Service’ menu
to activate them.
|
NB! One does not need to access
the service menu when replacing either user interface or lower board is
replaced. The software will automatically detect the modification and function.
CALIBRATION PARAMETERS
At the start-up the software reads calibration
parameters from both user interface and EEPROM. It compares the parameters that
they are matching and are within preset limits.
DEFAULT BRAKE CALIBRATION VALUES AND LIMITS
PARAMETER
|
DEFAULT
VALUE
|
MIN.
LIMIT
|
MAX.
LIMIT
|
A
|
25000
|
-50%
|
+50%
|
G
|
150
|
-50%
|
+50%
|
N0
|
20
|
-50%
|
+50%
|
S60
|
254234
|
-25%
|
+25%
|
D (delta)
|
0
|
0
|
10% of s60 default value
|
The comparison of the
parameters during the start-up can result one of the following options:
- Both user interface and EEPROM parameters are valid (within the limits) and they are matching together.
- Both user interface and EEPROM parameters are valid (within the limits), but they are not matching together.
- Only user interface parameters are valid (within the limits)
- Only EEPROM parameters are valid (within the limits)
- Neither memory has valid parameters.
PARAMETERS VALID AND MATCHING TOGETHER
This is the normal
situation. The software will use the calibration parameters read from the
EEPROM and use them to control the electromagnetic brake without notifying
anything to user.
PARAMETER VALID BUT NOT MATCHING TOGETHER
The most probable reason for
this is that the user interface has been in use and transferred to another
frame. In this case the software will prioritize the EEPROM parameters over the
ones in the user interface. This is because the components that have the most
affect on the parameters are on the frame and thus the EEPROM will have more
accurate parameters for the new combination.
Following question will be
displayed on the display:
"Calibration parameters
of User Interface and EEPROM are not equal. Restore brake calibration from
EEPROM to user interface? YES / NO"
YES: The software will use
the parameters from the EEPROM for controlling the electromagnetic brake and
store them also to the user interface memory.
NO
(or reset): The software will use the parameters from the EEPROM for
controlling the electromagnetic brake but will not store them to user interface
memory. The question will be displayed again after restart.
Note: The case can
also be that a second-hand lower board has been installed to the frame. In such
case the correct calibration parameters are on the user interface memory and
should not be overwritten with the ones from the EEPROM. One can get the correct
parameters in use by first answering 'NO' to the question and after that
manually saving the parameters to the EEPROM with 'SAVE' function in Service – Edit calibration menu.
ONLY USER INTERFACE HAS VALID PARAMETERS
The parameters on the EEPROM
are not valid for some reason (e.g. the lower board is a spare part which are
not pre-calibrated). Following question will be displayed on the screen:
"Calibration parameters
of EEPROM are not valid. Restore brake calibration from User Interface to
EEPROM? YES / NO"
YES: The software will use
the parameters from the user interface memory for controlling the electromagnetic
brake and store them also to EEPROM.
NO (or reset): The software
will use the parameters from the user interface memory for controlling the
electromagnetic brake but will not store them to EEPROM. The question will be
displayed again after restart.
ONLY EEPROM HAS VALID PARAMETERS
The parameters on the user
interface memory are not valid for some reason (e.g. it is a spare part which are
not pre-calibrated). Following question will be displayed on the screen:
" Calibration
parameters of User Interface are not valid. Restore brake calibration from
EEPROM to user interface? YES / NO"
YES: The software will use
the parameters from the EEPROM for controlling the electromagnetic brake and
store them also to user interface memory.
NO (or reset): The software
will use the parameters from the EEPROM for controlling the electromagnetic
brake but will not store them to user interface memory. The question will be displayed
again after restart.
NEITHER MEMORY HAS VALID PARAMETERS
User will be notified with
following message:
"Brake
is not calibrated"
The software will use the
default parameters (see Table 5-2), which will ensure satisfactory accuracy of the
ergometer resistance system. To have original parameters in effect again one
needs to manually add them to the memory through Service menu. Original parameters are written on label attached
to the product frame post inside side covers.
