Performance Procedures

Serial

Interface

and Nurse

Call Signal

Test

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.

Tools Needed:

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

SpO2 adapter cable (M1943A)

Step

Action

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 SpO2 simulator cable to the SpO2 adapter cable. Connect the cable to

 

the SpO2 patient monitoring input connector.

6

Set the simulator switches as follows:

 

 

 

 

 

Item

 

 

Setting

 

 

 

 

 

 

 

Oximeter

 

Nellcor

 

 

 

 

 

 

 

SpO2%

 

81

 

 

 

 

 

 

 

 

 

BPM

 

36

 

 

 

 

 

 

 

 

 

Pulse Mod

 

0.50%

 

 

 

 

 

 

 

 

 

 

 

 

 

7

Verify that the monitor is responding to the SpO2 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.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 4-2. Serial Interface Voltages

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Pin

 

Signal

 

Direction

 

 

Measurement (V)

 

 

 

 

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4-36Testing the Monitor

Page 86
Image 86
Philips 862478, 862474 manual Serial Interface Nurse Call Signal Test, Serial Interface Voltages, Pin Signal Direction

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