Nellcor OXIMAX N-600X Series, Service Manual

Page: 95 / 210

Calculating the Analog Voltage Output
Service Manual
10030881 Rev. B 12-2008
95
hold s that point for 15 seconds. It increases to 1.0 VDC and hold s that value for 15
seconds. The third part of the calibration signal is a stair step signal. The stair step
signal, begins at 0.0 VDC and increases up to 1.0 VDC in 0.1 VDC increments, each
held for one (1) second. Select the 0.0 VDC, 1.0 VDC, or stair step signal individually,
using the ANALOG softkey menu option.
The OxiMax N-600x pulse oximeter data port provides analog voltage outputs
between pins 6, 13, 14, and ground (pin 10), which can be used to calibrate oximeters
such as a chart recorder. The voltage represents a specific measured parameter's
current value. The voltage differential varies proportionally from 0.0 to +1.0 VDC as
the pin's parameter varies over its full range of values. For example, as the current
value of SpO
2
varies from 0% to 100%, the voltage from pin 6 to ground (pin 10) varies
from 0.0 to +1.0 VDC. A voltage of 0.94 volts indicates a current SpO
2
value of 94.
Figure 60.
Data Port Pin Layout
To set analog voltage output
1. Press the SETUP softkey.
2. Press the NEXT softkey three times.
3. Press the ANALOG softkey.
Figure 61.
Analog Voltage Screen
a.
VOLT Options
—Selecting the 0 VOLT or 1 VOLT softkey causes that voltage to appear
at pins 6, 13, or 14 as referenced to ground pins 5 and 10.
b.
STEP Option
—Selecting the STEP softkey causes the voltage to increase from 0.0 to
1.0 volts at 1/10th-volt increments, with each step lasting at least one second.
4. Press the BACK softkey.
Figure 59.
Analog Pinouts
Pin
VDC
Parameter Parameter Range
6 Saturation 0 - 100%
13 Pulse Rate 0 - 250 bpm
14 Waveform 0 - 254 PAU