Cosman G4 Radiofrequency Generator Service Manual (SPI
11291
Rev A)
Section 9
9.2.4 Pulsed RF Settings
The Electrode Setup settings (Section 7.1) determine the number and configuration of electrodes when the
generator delivers Pulsed RF output. When Pulsed RF output is enabled by the user, it is delivered to all
electrodes selected as “active” on the Electrode Setup screen. The following settings determine the Pulsed
RF output characteristics.
•
Stagger Start
: When using multiple electrodes, electrodes will turn on sequentially from low to high
index, spaced in time by this setting value.
•
0 seconds
: All electrodes are energized simultaneous when the user enables Pulsed RF output
using the front-panel Start button.
•
5-30 seconds
: After the user enables Pulsed RF output using the front-panel Start button, each
electrode is not energized until Stagger Start seconds after the previous, lower-indexed
electrode is energized.
•
Auto Ramp
: This setting cannot be set by the user in the One Touch interface. It is implicitly set to
On at all times, except when Automatic Temperature Control is disabled (Max Temp = Off), in which
case it is set to Off and the Pulsed RF output Voltage must be controlled manually by the user with
the Output Control Knob.
•
E-Dose
: Applicable if Automatic Temperature Control is enabled (i.e. Max Temp is not “Off”), one of
the pulse parameters is automatically reduced to keep all electrode temperatures below the Max
Temp setting.
•
Vary Voltage:
Voltage may be automatically reduced from the Set Voltage setting to keep all
electrode temperatures below the Max Temp setting.
•
Vary Pulse Width (“Vary Width”):
Pulse Width may be automatically reduced from the
Pulse Width setting to keep all electrode temperatures below the Max Temp setting. Voltage
is reduced when the Pulse Width cannot be reduced below its minimum value.
•
Vary Pulse Rate (“Vary Rate”):
Pulse Rate may be automatically reduced from the Pulse
Rate setting to keep all electrode temperatures below the Max Temp setting. Voltage is
reduced if the Pulse Rate cannot be reduced below its minimum value.
•
Max Temperature (“Max Temp”):
•
Off
: Automatic Temperature Control is disabled. The generator will not control the Temperature
at any electrode. Auto Ramp is set to Off and the Pulsed RF output Voltage must be controlled
manually by the user with the Output Control Knob.
•
37-90 °C
: Automatic Temperature Control enabled. Pulsed RF output is automatically adjusted
so that electrode Temperatures do not exceed the Max Temp value.
•
Set Voltage:
The target Voltage amplitude of the Pulsed RF output.
•
Pulse Width:
The duration in milliseconds of each burst of Pulsed RF output.
•
Pulse Rate:
The rate in Hz (equivalent to “Pulses Per Second”) at which bursts of Pulse RF output
are delivered.
•
Set Time:
This setting determines the total amount of time that Pulsed RF output is delivered to
each electrode. Once this time interval has elapsed for each electrode, electrode output is disabled
automatically.
Содержание G4
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