Power Calibration General Information - ConMed Sabre 2400 Operators & Service Manual

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4.6.2 Power Calibration General Information

• The only equipment necessary to conduct
power calibration is an electrosurgical output
power tester having load resistances of 300, 400
or 500 ohm for Monopolar and 50, 100, or 125
ohms for Bipolar and an RF rms current indica-
tor capable of accurate measurements from 50 to
1000 mA. These units are commercially available
from a number of sources, or can be constructed
using 250 watt 3% or better noninductive resis-
tors and a selection of RF ammeters ranging from
150 mA to 1A full scale.
• If the selected power calibration load resistance
is other than the rated load, target current will
deliver another power which takes into account
Sabre 2400's typical load regulation characteristics
in that mode. The actual load regulation curve for
a particular unit may vary somewhat from typical,
so the most accurate calibration is obtained when
calibration is performed using the rated load.
Satisfactory calibration is possible ONLY if the
calibration resistor option chosen and the actual
load resistance used are the same.
MODE MODE USE
(CUT PWR)
C-C MONOPOLAR
POWER CAL
bP BIPOLAR PWR
CAL
PAd ARM (PAD)
RESISTANCE
CALIBRATION
dIA DIAGNOSTICS
4-10
OPTION 1 OPTION 1 USE
(COAG PWR)
300, 400, 500 SELECT LOAD
RESISTANCE
FOR CAL
50, 100, 125 SELECT LOAD
RESISTANCE FOR
BIPOLAR CALIBRATION
BLANK
1 WATCHDOG
TIMER CHECK
2 PSEUDO RUN MODE
(DISABLES SOFTWARE
SHUTDOWN TO AID
TROUBLESHOOTING)
3 VIEW MODE
Table 4.6 CAL Mode Options
CAUTION: Before activating a newly selected
point, be sure that the tester range is at least
as great as the displayed target current. Bear
in mind that a unit which is far out of calibra-
tion may deliver considerably more than the
target current.
• The Power Increase and Decrease keys are used
to select the calibration points when the unit is
not activated. When the highest calibration point
in a mode is displayed, the Power Increase key
will have no further effect; the same is true for
the Power Decrease key when the lowest point is
displayed. This is useful in determining when a
mode is fully calibrated.
• Each point is calibrated by activating the
unit, then using that mode's Power Increase or
Decrease key to match the target point as close as
possible. It may not be possible to match the tar-
get exactly, but the setting which reads closest to
the target will be within the specified tolerance.
The most accurate current readings will appear on
the lowest RF current range which reads on scale.
OPTION 2
(BIPOLAR PWR)
A, P
A, P
NONE
NONE
1-9
OPTION 2 USE
SELECT
READOUT IN
AMPS OR POWER
SELECT
READOUT IN
AMPS OR POWER
SEE TABLE 4.9
FOR DETAILS