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4.6.1
Installing Batteries
1. Remove the battery cover access door by pressing the battery compartment access door latch.
Install four alkaline "C" cell batteries. Be sure to observe the polarity indicator sticker.
2.
3. Replace the battery cover access door.
4.6.2
Loading/Clearing Printer Paper
The N-20P uses a thermal paper that can show printed characters on one side only. Make sure that the
paper roll is correctly installed; always refer to the graphical instruction label found on the paper roll.
1. Press down and outward on the top of the paper compartment door to remove it.
2. Feed the paper into the paper compartment slot; refer to the graphic label for orientation.
3. Press and hold the ADV button until the end of the paper appears at the paper exit slot.
4. Replace the paper compartment door.
If the paper jams either during the loading process or during printing, proceed as follows:
1.
Remove both the paper door and the printer-head access cover.
2.
Firmly grab and pull the paper roll backward—out and away from the print head—observe
the access to the print head to determine whether or not the paper escaped from the jammed
position.
3.
If paper remains jammed between the print head and printer, press the ADV button; the
jammed paper may work its way out. If the paper remains jammed, and the printer drive does
not advance the paper, manually advance the drive gear on the side of the printer to free the
paper.
4.
If these attempts fail to free the jammed paper, remove the printer from the unit to gain full
access (see paragraph 5.3, N-20 Disassembly Procedure).
4.6.3
Setting Date and Time
The following procedure applies to the N-20P only.
The following code letters and numbers appear in both Oxygen Saturation and Pulse Rate display
fields. The symbol "xx" represents information in the Oxygen Saturation display field and "yy"
represents information in the Pulse Rate display field.
Begin this procedure by first removing any sensor from the instrument.
Turn on the monitor without the sensor connected. Switch on the N-20P and allow the
1.
unit to run the Power-On Self-Test.
2.
When dashes appear in the Oxygen Saturation and Pulse Rate displays, press the D/D
(day/date) button once. At this point, the Oxygen Saturation display field shows "txx", with
"t" representing time; "xx" representing hours, and "yy" representing minutes. Note that "xx"
(hours) is flashing.
3.
Press the ADV (advance) button repeatedly until the correct hour is displayed.
4.
Press the D/D button once. Note that "yy" (minutes) is now flashing.
5.
Press the ADV button repeatedly until the correct minute is displayed.
6.
At this point, the Oxygen Saturation display field shows "dxx", with "d" representing date;
"xx" representing the month, and "yy" representing the date. Note that "xx" (month) is
flashing.
7.
Press the ADV button repeatedly until the correct month is displayed.
8.
Press the D/D button once. Note that "yy" (date) is flashing.
9.
Press the ADV button repeatedly until the correct date is displayed.
10.
Press the D/D button. At this point, the Oxygen Saturation display field shows "Yxx", with
"Y" representing "year." Note that "xx" (year number) is flashing.
11.
Press the ADV button repeatedly until the correct year number is displayed.
12.
Press the D/D button once. The N-20P turns itself off within 5 seconds.
Troubleshooting
4-5
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