Johnson & Johnson ETHICON ENDO-SURGERY HARMONIC 300, Service Manual

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GEN04
Chapter 8 - Generator Output Check
Procedure for Checking the output of GEN300 Generators
1 Perform the functional test sequence of steps contained in the service manual, Chapter 7 – Safety
and Function Testing (page 23).
2 Then check the generator’s current output:
a . Power the generator off. Wait 10 seconds.
b . Power the generator on while firmly pressing both “ Standby ” and “ Min Power-down ”
buttons simultaneously. Continuously press the two buttons until page number 1 of the
BME display mode is visible and only the Standby indicator is lit.
Note: A Generator “ Error Code #1 ” will result if the two buttons are not continuously
pressed as described and the generator will have to be powered down and back up again.
c . Connect a known good HP054 Hand Piece to the generator.
Note: Make sure the hand piece is not hot (i.e., at room temperature).
d . Using the torque wrench for the hand piece, attach the test tip to the hand piece.
e . Use the up and down arrows to scroll to page 2.
f . Record the current set point value for the hand piece listed on page 2.
Expected Output Current = _____________________________
g . Press the “ Standby ” key to enter Ready state.
h
. Activate at level 5 by pressing the max foot switch pedal or max switch on the hand
switching adapter while keeping the test tip in air.
i . Allow the pre-run test to complete. Terminate activation after regular max activation beeps
are audible.
j . Record the current on the display while continuing to activate at level 5.
Actual Current Output = _______________________________
k . Note: The current read should be within +/- 1% of the current recorded on page 2 of the
standby screen’s display.
If further confirmation of output is desired, remove the box cover and measure the current in
step f with a true RMS Digital Volt Meter with a bandwidth of at least 300Khz .
Make the voltage measurement across the series combination of R233 & R234
Note: for ease of testing and best accuracy, clip one test lead on the leg of R229 closest to
R233 and hold the other test lead on the leg of R234 that is furthest away from R229.
Note: Since the resistance value of the series combination of R233&R234 is 1ohm, the
voltage read in mV RMS is equal to the current in mA RMS.
3 If the GEN300 passes the above steps, then generator current output is functioning properly.