Gendex Dental Systems
B-13
ORALIX AC SYSTEM
INSTALLATION
2.5.
POLARITY TEST
The following test is applicable only for phase/neutral mains supply. In case of phase/phase mains supply the
test is not applicable.If a reversible mains plug is used, the polarity test is not applicable and the second mains
fuse F3 must be enabled by cutting jumper W11 (see diagram Z1-1).
REMARK
Do not mount Tubehead until Polarity Test has been satisfactorily completed.
The correct polarity of the mains shall be tested, to ensure that the live wire of the line is protected by the mains
fuse F4 as required. Perform the test as follows:
Connect an AC voltmeter between the
block terminal X3:4 (live) and X3:3 (ground).
Turn on mains supply and verify that the
full line voltage is measured.
If no voltage is measured, proceed as fol-
lows:
- turn off the mains,
- reverse the line wires connection,
- turn on the mains again,
- repeat the line voltage measure.
Verify also that in the same conditions no
voltage is present between the block ter-
minal X3:5 (neutral) and X3:3 (ground).
If any voltage is found, verify the mains dis-
tribution.
Check by an Ohmmeter the continuity of
the electrical connections from Timer to
Tubehead (see BZ-4).
NOTE
This is necessary to ensure that the wave sup-
pressor circuit incorporated in the Tubehead
performs effective attenuation of the negative
half-wave of the mains power (unloaded half-
wave). It reduces the no load magnetic cur-
rents and inductive voltage spikes, ensuring
a safe operation and prolonged lifetime of the
equipment.
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Printed on: 22 Mär 2012, 09:28:10 am; Printed by: TOBIAS BAUER
