otometrics Madsen ZODIAC 901, Руководство пользователя

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3.2.5 OTHER FRONT PANEL CONTROLS
Rotary Knob
The
Rotary Knob
is used: to select the characters for operator and pa-
tient identification (§3.4.2); to adjust pump pressure (§4.1.1, §4.1.49.1.4,
§4.2.1, §4.2.3, §4.3.1, §4.3.2); to vary Sound Pressure Level (§4.2.1, §4.2.3,
§4.3.1, §4.3.2, §4.3.3); to move the marker (§5.1.6); to adjust display con-
trast (§5.1.5, §7.2); and to set beeper level, time and date (§7.2). It may
also be used to adjust any other test parameter with more than two pos-
sible values: hold the corresponding
Softkey down and turn the Rotary
Knob in either direction as required.
Tone Switch The Tone Switch is used: to key in the characters for operator and pa-
tient identification (§3.4.2); to start reflex test measurements (§4.2.2,
§4.2.3, §4.2.4, §4.3.1, §4.3.2); and to present stimuli for reflex testing
(§4.2.1) and for air conduction testing (§4.3.3).
Printer Pressing the Printer key displays the Printer sub-menu, which occupies
only the five panels at the bottom of the screen, leaving any test results
visible. This allows selection of the internal printer (if fitted) or external
printer (if connected), and disabling of printout, which overrides prepro-
grammed printout in the Auto tests; control of the paper in the internal
printer; screen dump, which includes the relevant sub-menu; printout of
the data for the current test (including data not shown on the test screen,
but specified in the Measurement Setup, e.g. pump speed); and printout
of all data, including test results, for the current patient, together with
the Madsen Electronics’ logo and, if it has been programmed, the clinic’s
or audiologist’s custom header. See §5.3.
Air Release
Pressing the Air Release key provides a means of rapidly relieving the
pressure in the ear canal of a patient who experiences sudden distress
during a test. Note that, for patient safety, this key is connected directly
to the air release valve, making it independent of the microprocessor.
The Air Release key also returns the pump to the middle position.
Ext. Range
In Tymp Mode, the normal range of pump pressures for middle-ear test-
ing is from –400 daPa to +200 daPa. Pressing the
Ext. Range button tog-
gles between the normal range and an extended range from –600 daPa to
+400 daPa. The
Ext. Range
lamp lights red when the extended range is
selected. In Reflex Mode, when extended range is selected, the maxi-
mum Sound Pressure Level of the stimulus available in Reflex and
Threshold tests is also increased, from 100 dB to 115 dB in Ipsi, and from
100 dB to 120 dB in Contra.
Operation Manual 17
GN Otometrics GENERAL DESCRIPTION Chap. 3
ZODIAC 901 Middle-Ear Analyzer
FRONT PANEL LAYOUT & CONTROLS
3.2