ConMed Sabre 2400 Operators & Service Manual page 53

• After a fully calibrated mode is entered, making
a change to any one calibration point will cause
all of the other points in that mode which have
not yet been checked to be declared uncalibrated.
Those points must then be calibrated prior to
returning the unit to service. This precaution is
taken on the assumption that if some part of the
circuitry has changed enough to justify adjust-
ment of one calibration point, then it is likely that
the other points have been affected as well.
• Each calibration point has fixed upper and
lower limits which will permit calibration of a
healthy unit at nominal line voltage. It is not pos-
sible to store a calibration value in the EEPROM
which falls outside that range.
• The CAL Mode is entered by powering up
while depressing the internal CAL switch, A2S1.
Successful CAL Mode entry is signified by all dis-
play segments illuminating. This allows a careful
check of the display for missing segments.
• To proceed past the display check, press the
SEL key, then the CUT power window will
display "C-C", which is one of four available
mode selections. Any of the other modes may
be selected sequentially by pressing the CUT
Power Increase or Decrease keys. In some modes,
the COAG power window and/or the Bipolar
power window will display an option applicable
to that mode; these options are similarly select-
able by pressing the Power Increase or Decrease
keys. Details of how to use each mode appear in
following sections. The available CAL modes,
options and their uses are summarized in Table
4.6.
• Although the points in a Calibration mode
may be calibrated in any order, it's best to use a
sequence which ensures that calibration is com-
plete before returning to the menu.
• When calibration in a mode is completed sat-
isfactorily, pressing the "SEL " Key will save all
calibration changes and will return to the menu.
If the menu mode display for one of the three
Calibration modes is flashing, then one or more
points in that mode is uncalibrated or nonmono-
tonic. Pressing the "SEL " Key again will restore
the menu, from which the mode may be reen-
tered and calibration completed or corrected to
fix the problem.
• When the "SEL " Key is pressed to exit a
Calibration mode, the unit first checks for any
uncalibrated points in that mode. If any exist,
then a HLP-10 code is displayed. The values
of all of the points remain as they were at the
time of exit, eliminating the need to repeat the
adjustments that were already made. An excep-
tion occurs when the selected load resistance is
changed. In that case, the entire section (C-C or
bP) will go to it's uncalibrated state. Pressing the
"SEL " Key again will restore the menu, and the
menu display for the partly calibrated mode will
flash. The calibrated and uncalibrated status for
all points in that mode is preserved while in CAL
Mode, so that when the mode is reentered, it is
necessary only to calibrate the flashing points to
fully calibrate that mode.
• CAL Mode is exited by turning the POWER
switch OFF. This operation should only be per-
formed AFTER returning to the main menu.
NOTE: If ANY of the modes in the menu are
flashing, the calibration for that mode is invalid.
Exiting CAL Mode in this condition will result in
an immediate EEPROM FAIL (HLP-3) alarm on
powerup in RUN mode. Complete recalibration
will then be required in order to return the unit
to service.
• It's a good practice to be sure that all of the
menu modes show as calibrated (not flashing)
before departing CAL or entering Diagnostics
modes.
• The Diagnostics modes are removed from the
menu after RF is activated in either of the Power
Calibration modes. It is not possible to return to
the menu from either of the Diagnostics modes
without powering down.
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