Philips 862474 ユーザーズマニュアル

Performance Procedures

Testing the Monitor  

Perform the following procedure to test the serial port voltages. The test is qualitative and 
only verifies that the serial interface port is powered correctly, and that the Nurse Call signal 
is operational. The serial connector is a male DB-9 located on the monitor’s rear panel, 
identified by the RS-232 symbol.

•

Clinical Dynamics Corp - SmartSat simulator (with Nellcor simulator cable)

•

SpO

2

 adapter cable (M1943A)

1

Turn the monitor On.

2

Set up the DMM with the function set to VDC at a range of 10 volts.

3

Connect the DMM negative lead to connector pin 5 (GND), or the shell of the 
RS-232 connector.

4

Referring to Table 4-2, Serial Interface Voltages, connect the DMM positive 
lead to each pin in turn, and verify the voltage values listed. Voltage for pin 9 is 
that listed from the No Alarm condition.

5

Connect SpO

2

 simulator cable to the SpO

2

 adapter cable. Connect the cable to 

the SpO

2

 patient monitoring input connector.

6

Set the simulator switches as follows:

7

Verify that the monitor is responding to the SpO

2

 simulator signal and the 

audible alarm is sounding. If desired, press the Alarm Silence button to 
temporarily silence the audible alarm.

8

Connect the DMM positive lead to pin 9 and verify the voltage value listed in 
Table 4-2, Serial Interface Voltages. The voltage for pin 9 is that listed for the 
Alarm Underway condition.

Min.

Typical

Max.

1

not used

-0.4

0.0

0.4

2

RXD <<<

input

-0.4

0.0

0.4

3

TXD<<<

output

-5.0

-7.0

-15.0

4

DTR<<<

output

5.0

7.0

15.0

5

GND

-0.4

0.0

0.4

6

DSR<<<

input

-0.4

0.0

4.0

7

RTS>>>

output

5.0

7.0

15.0

Oximeter

Nellcor

SpO

2

%

81

BPM

36

Pulse Mod

0.50%