Dc Isolation Tests; Functional Testing - ConMed Hyfrecator 2000 Service Manual

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markings or blur the power display image, so they should be used only when necessary and sparingly.
Thoroughly dry the unit and cords with a lint-free cloth before applying power.

4.2.2 DC Isolation Tests

This test verifies that the patient output jacks are isolated at DC from earth and from one another. Failure of
this isolation will put the patient at risk of electrical shock.
1. Disconnect the power cord from the unit's AC inlet connector and any accessory connected to the
handswitch connector.
2. Set your DC ohmmeter to the 20 megohm or higher range, and connect one lead to the P/P jack. Verify
that over 20 megohms appears between the P/P jack and the following terminals:
• AC inlet ground (earth).
• HI output.
• LO output.
• Either BI output jack.
• Any one of the handswitch pins.
3. Move the first lead from the P/P jack to either BI jack. Repeat this test to the following terminals:
• Opposite BI jack.
• Any one of the handswitch pins.
NOTE: You may observe a normal "capacitor charge" response on some of these tests. Verify that the
reading settles above 20 megohms within a few seconds.
If any of these tests fail, correct the fault before applying power. See Section 4.4.8.

4.2.3 Functional Testing

This series of tests verifies that all of the displays and controls are functioning properly and that all Power On
Self Tests (POST) will pass.
1. Connect the power cord and a handswitching accessory supplied by the user to the unit. Use your own
Hyfrecator® 2000 handswitching accessory if the user's is not available. Leave the accessory RF lead
disconnected from the unit for now.
2. The unit may be operated safely for PM while resting on its rear panel.
3. Set the unit's power switch to OFF (O), and connect the power plug to a source of AC mains power
equal to the unit's nameplate rating.
NOTE: The Hyfrecator® 2000 relies upon a sound earth connection to the AC power plug
for functional return of monopolar RF current. Do NOT use an AC source which lacks a
proper earth connection.
4. While observing the Power Display, turn the power switch On (I). Verify a normal Power On Self Test
(POST) display and tone test. Each segment, including the decimal point, of both power LEDs should
illuminate one at a time in a "rotating" sequence over about two seconds, and the audible tone should sound
four times.
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