ConMed 7550 - Bipolar Calibration (Power Control Assembly - A4); ABC Calibration (Power Control Assembly - A4); ABC over Voltage Calibration (Power Control Assembly - A4) [Optional]; EEPROM Calibration

8-4
8.7.5 Bipolar Calibration (Power Control
Assembly - A4)
• Connect a 100 - 125 ohm load (ESU analyzer)
between the two (2) Bipolar RF Output
Jacks.
• Set Bipolar for 50W.
• Activate Bipolar and adjust RA6 (BIP CAL)
for 50W
±2W.
8.7.6 ABC Calibration (Power Control
Assembly - A4)
• Connect a 500 ohm load (ESU analyzer)
between Patient Return and the ABC Output
Connector. It is necessary to use an ABC
adaptor for ABC calibration.
• Set the ABC Power for 15W.
• Activate ABC and adjust RA2 for 15W
±2W.
• Set the ABC Power for 150W.
• Activate ABC and adjust RA1 for 150W
±2W.
RA1 & RA2 are interactive, so adjusting one
requires a check/adjustment of the other until
both output powers are correct.
8.7.7 ABC Over Voltage Calibration (Power
Control Assembly - A4) [Optional]
CAUTION: High Voltage Potential on the RF
Output can cause serious burns. RF Leakage
exceeds safe limits of 150mA during this cali
-
bration - do not hold the ABC adaptor while
performing this procedure.
• Connect 1000:1 oscilloscope probe differen
-
tially to the ABC and Patient Return outputs.
• To set the scope for differential measurement
Press ADD; invert channel 2; set amplitudes
of both channels for maximum amplitude
initially.
• Connect a jumper to the bottom side of R67
of the Power Control Assembly and the other
end of the jumper to ground (TP3 GND).
• Set ABC Power for 15W - 20W initially.
• Activate ABC and adjust the ABC power con
-
trol dial for an output voltage of 3500Vpk.
• Adjust RA9 on the Power Control Assembly
until the output signal disappears.
• Return the ABC Power Control to a setting of
less than 30W.
• Activate ABC and increase the power control
and verify the signal disappears when the out-
put is 3500Vpk
±200Vpk.
• Remove the jumper.
8.8 EEPROM Calibration
This procedure loads PW_MEA values into the
EEPROM for Single Ended RF Drive monitor
-
ing. A load on the RF Output terminals is not
required. For each listed procedure, the system
will remain active for approximately 3 seconds to
allow time for the microprocessor to read the ana
-
log values and load into the EEPROM.
8.8.1 Spray Coag PW_MEA Loading
• Verify that Position 1 of Switch 1 (S1) on the
back side of the display panel is ON (up).
• Set Spray power for 49W.
• Activate Spray Coag for approximately 2 sec
-
onds.
• Verify that in the ABC Display Window, the
number displayed is between 80 and 115.
(This is a stored value.)
8.8.2 ABC PW_MEA Loading
• Verify that Position 1 of Switch 1 (S1) on the
back side of the display panel is ON (up).
• Set ABC power for 11W.
• Activate ABC - Verify the number displayed
in the Coag window is between 12 and 25.
(This is a stored value.)
• Set ABC power for 149W.
• Activate ABC - Verify the first number dis
-
played in the Cut window is between 130 and
180. (This is a stored value.)
8.8.3 A.R.M. Max Voltage Loading
• Verify that Position 1 of Switch 1 (S1) on the
back side of the display panel is ON (up).
• Remove the Patient Return Adaptor from the
Patient Return Connector.
• Press the Monitor Set Front Panel Switch.
• Verify the second number in the Cut window
is between 171 and 222. (This is a stored
value.)