RF POWER OUTPUT MEASUREMENT
NOTE
This section does not apply to Germany and will not appear in the German version of this
manual.
RF power output measurements can be made using an “Output Test Cable” which enables
the attachment of an external load and RF Voltmeter to the VAPR generator. The output can
be compared to the typical full and half power load curves listed in the following Technical
Specifications section.
NOTE
The output specification is ±20% of the typical load curve value.
Note:
Output Test Cable #OM101 can be purchased by contacting [email protected]
or fax to +1 (925) 280-1788 (Fax number does not apply to France).
CAUTION
DePuy Mitek Products Inc. expressly recommends against attempting to make RF output power
measurements by any other means than described in this manual.
Technical support in connection with end user corroboration of the published VAPR
generator load curves can only be provided by DePuy Mitek on the condition that the user’s
measurement system corresponds to the test method layout depicted in FIGURE 5.2. This is
the scheme adopted by DePuy Mitek for all product manufacture tests and has been found
to be in accordance with the power measurement strategy for electrosurgical equipment
employed by certified test agencies. Attempting to obtain an output power measurement
by direct measure of voltage may give results that are inaccurate and unrepresentative of
the system due to inducing earth loop currents or causing imbalance of the floating bipolar
output stage.
DePuy Mitek recommends the use of the following equipment, or equivalents with at least
commensurate specifications, when measuring RF output power:
EITHER
Fluke 8920A True RMS voltmeter
OR
Hewlett Packard 3403C True RMS voltmeter
Pearson Model 411 Current monitor (0.1V/A)
Arcol NHS200 series load resistors
When performing such measurements, DePuy Mitek recommends that the resistance loads
should be of the noninductive type, minimum rating 200 watts. To verify output power against
the published load curves, resistances of 68 ohm, 150 ohm, and 1 kohm will be sufficient.
Ensure that the generator has been correctly configured for the desired output modality prior to
making measurements.
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eCHNICal
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