Theory Of Operation; Mode Descriptions; Cut Major Modes; Coag Major Modes - ConMed SYSTEM 5000 Service Manual

System 5000™ functions and essential circuit information are provided in this section. This section begins
with a description of the key parameters for each mode. This is followed by an overview of how the system
functions and some key operational information for the modules within the system.
3.1

Mode Descriptions

The key functional parameters for each mode are presented here. Nominal mode specifications are provided
in section 1.2.11.
3.1.1

Cut Major Modes

Major Minor RF frequency
mode Mode
CUT PURE 391 KHz
BLEND 1 391 KHz
BLEND 2 391 KHz
BLEND 3 391 KHz
Activation of Pulse Cut will make the selected cut
mode, Pure Cut, Blend 1, Blend 2, or Blend 3
active for 70 milliseconds every 600 milliseconds.
NOTE: The low duty cycle of Pulsed Cut mode
makes the average power very low – about 12%–
when compared with the power displayed on the
3.1.2

COAG Major Modes

Major Minor Mode
mode
COAG PINPOINT
STANDARD
SPRAY
Activation of Pulse Coag will make the selected
coag mode, either Standard or Spray, active for
2.5 milliseconds every 5 milliseconds. Displayed
power setting will represent the average power
being delivered which is approximately half the
power delivered during the pulses.

Theory of Operation

Section 3.0
Modulation: Number of
Pulses, Time on/off
None
16 pulses
40μs/10μs
11 pulses
28μs/23μs
10 pulses
26μs/24μs
RF frequency
391 KHz
562 KHz
562 KHz
TM
Modulation: Frequency &
period
None
20 KHz
50μs
20 KHz
50μs
20 KHz
50μs
front panel. The period is also long causing most
ESU analyzers to provide erratic or erroneous
readings. Correct power can be verified by mea-
suring the peak to peak current and comparing the
value with the current measured in the non-pulsed
mode.
Modulation: Number
of Pulses, Time on/off
4 pulses
10μs/40μs
Single pulse
Single pulse
Standard and Spray Coag modes are fundamental-
ly different from the Cut modes in that the reso-
nant circuit of the RF Amplifier and Transformer
combination is excited by the energy of a single
pulse, causing the resonant circuit to ring until
the energy is dissipated. Circuitry in the amplifier
Modulation:
Frequency & period
20 KHz
50μs
39 KHz
19 KHz
3-1