Nellcor N-180 Service Manual page 74

N-180 Pulse Oximeter Service Manual
Suitable connector to
mate with safety analyzer
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Figure 7-1: Test Adapter One
| You need the following parts to build the RCAL HI and RCAL LO fixtures:
* Two 9-pin male D-type connectors
e Two connector hoods
* Two 10 kilohm, 10-turn trimpot, potentiometers
e Wire
Here are the directions for building test adapter one, the RCAL HI adapter
(figure 7-2):
1. Solder 10 kilohm potentiometer leads across pin 1 and pin 6 respectively
of a D-type connector.
2. Connect a 0.1 percent Ohmmeter between pin 1 and pin 6.
3. Adjust potentiometer for a 9,760 Ohm reading.
10K
Figure 7-2: RCAL Hi Test Fixture
Test adapter two is constructed the same way as test adapter one, except you
adjust the potentiometer to 6,040 Ohms.
TESTING PERFORMANCE
Perform these tests to verify the monitor is operating correctly. To fully
exercise monitor operation, perform these tests in the following order.
1. Battery operation
2. Battery charge
3. Pulse oximetry function
4. Data output
How to Charge the Battery
Perform this procedure to fully charge the battery, or after performing the
battery operation test. In addition, to insure the battery is bully charged,
perform this procedure before attempting to repair the monitor.
1. Connect monitor to a an AC power source that matches requirements of
your monitor as labeled on back panel near input connector.