Nellcor OxiMax N-595 Operator's Manual page 66

Monitor Trend
VIEW
ZOOM
TIME
SCALE
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3. Press the VIEW softkey.
4. Press any of the trend softkeys (DUAL, SPO2, or PULSE). To
select HIST (histogram) or AMP (amplitude), press the NEXT
softkey and then the HIST or AMP softkeys.
5. Press the ZOOM softkey. The Zoom menu is displayed.
Pressing the TIME softkey cycles the displayed trend time scale
through 48 hours, 36 hours, 12 hours, 8 hours, 4 hours, 2 hours, 1
hours, 30 minutes, 15 minutes, 40 seconds and 20 seconds.
Note: The 20-second and 40-second trend displays are in tabular
format. The below display starts out in the normal response
mode (left side of the display) and switches to the fast response
mode.
Pressing the SCALE softkey cycles the displayed trend amplitude
scale through ±5 points, ±10 points, ±15 points, ±20 points, ±25
points, ±30 points, ±35 points, ±40 points and ±50 points above and
below the data point under the cursor. The saturation graphical
monitor trend display vertical scale default setting is from 10 to 100 if
there is no data under the cursor. The pulse rate graphical monitor