Nellcor N-180, Manual

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N-180 Pulse Oximeter Service Manual
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need to distinguish between monitor versions the single term monitor applies
to either version.
The domestic version (N-180) operates on 110–120 VAC and the international
version (N-180E) operates on 220–240 VAC. There are also differences in the
way controls are marked. Because of the different operating voltages, the
following electrical components differ.
• Transformer
• AC inlet
• Fuse
The parts listings in Section 9, Parts List, distinguish between the models
where such distinctions are needed.
The physical and operational characteristics of these monitors are completely
described in the respective operators manuals. These manuals and other
publications that apply to operating and servicing the monitor are described
in the following paragraph.
RELATED DOCUMENTS
To perform test and troubleshooting procedures and to understand the
principles of operation and circuit analysis sections of this manual, you must
know how to operate the monitor. Refer to
Operators Manual Nellcor N-180
Pulse Oximeter or to Operators Manual Nellcor N-180E Pulse Oximeter, as
applicable.
To understand the various Nellcor sensors that work with the monitor, refer
to the Nellcor poster
Pulse Oximetry or to the information supplied with your
individual sensors.
CONVENTIONS USED IN THIS MANUAL
The following conventions are used in this manual:
• In text, active low logic signals are designated by an asterisk after the
signal name (for example SIGNAL*). On logic diagrams a virgule (/)
before or after the signal name designates logic low active. In addition,
an over score also designates logic low on some schematic device
symbols.
• Signal names are printed in all capital letters.
• Fold out illustration numbers are preceded by the letters FO.
• The front panel switch that controls operating power to the monitor
bears symbolic marks that are difficult to set in type. Therefore, the
term ON/STDBY is substituted for the symbolic marking.
RETURNING THE MONITOR
If you must return the monitor to Nellcor, call Nellcor’s Technical Services
department for shipping instructions. To facilitate repair or replacement
processing Nellcor will give you a return goods authorization (RGA) number.
To repackage the CO
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indicator disconnect the sensor and the power cable.
Carefully pack the monitor in the original shipping carton. If the original
carton is unavailable, use a suitable carton with an appropriate amount of
packing material. Mark the shipping carton and any shipping forms with the
RGA number.