Philips SureSigns VS3 – System admin menu – Maintenance Menu – Self test mode – Medical Electronic repair and service

Category: Medical Electronics Repair and Service 

Contents of this article 

• How to access system admin menu 
• Hard shutdown procedure 
• How access Maintenance menu 

Philips SureSigns VS3

System Admin Menu
Use the System Admin section of the System Menu to configure monitor-wide default
settings and parameters.
To access the System Admin menu:
1. Rotate the wheel until the System icon is highlighted, then press the wheel.
2. Rotate the wheel until the System Admin button is highlighted, then press the wheel.

A Password window appears

4. Enter the Administrator password (2-1-5) by turning the wheel until the first box is highlighted, then pressing the wheel. Rotate the wheel to select the first digit, then press the wheel to save the digit. Repeat this for the next two digits of the password.
5. Rotate the wheel until the OK button is highlighted, then press the wheel.
The System Admin Menu appears.

Selecting a Language
You can configure a variety of languages on the monitor. To change the language:
1. Open the System Admin section of the System menu.
2. Rotate the wheel until Language is highlighted.
3. Press the wheel, then rotate it to select the language in which you want to use the monitor.
4. Press the wheel again to save the setting.
A confirmation window appears warning that to change the language, the system must reboot.
5. In the confirmation window, rotate the wheel to Yes, then press the wheel to change the language and reboot the system.

Setting the Alarm Tone Pattern
The Alarm Tone setting controls the pattern of audible sounds during alarms. To set the alarm tone:
1. Open the System Admin section of the System menu.
2. Rotate the wheel until Alarm Tone is highlighted.
3. Press the wheel, then rotate it to select the default setting for alarm tone.
4. Press the wheel again to save the setting.
5. Press the Main Screen button on the front panel to close the menu.

Setting the Minimum Alarm Tone Volume
You can configure the alarm volume to control the minimum volume that a user can set on the monitor. To set the minimum alarm tone volume:
1. Open the System Admin section of the System menu.
2. Rotate the wheel until Minimum Alarm Tone Volume is highlighted.
3. Press the wheel, then rotate it to select the minimum alarm tone volume that a user can set.
4. Press the wheel again to save the setting.
5. Press the Main Screen button on the front panel to close the menu.

Changing the Initial NBP Pressure
You can specify the initial NBP inflation pressure value for Adult, Pediatric, and Neonatal patients. The monitor uses this default value for new patient starts. When the monitor is using Interval mode, the cuff inflates to the Initial NBP Inflation Pressure setting for the first NBP measurement, and then the monitor adjusts the inflation value based on the patient’s Systolic measurement.
To change the initial NBP inflation pressure:
1. Open the System Admin section of the System menu.

Default Initial NBP Inflation Pressure menu is highlighted.
3. Press the wheel and rotate it to select the initial NBP cuff inflation pressure.
4. Press the wheel to save the settings.
5. Press the Main Screen button on the front panel to close the menu.

Performing a Hard Shutdown
Perform a hard shutdown whenever you need to power down for a battery change. This ensures that all patient and system data is saved in memory.
To perform a hard shutdown:
1. Open the System Admin section of the System menu.
2. Rotate the wheel until the Shutdown button is highlighted and press the wheel.
A confirmation window asks if you want to shut down the system.
3. In the Confirmation window, answer Yes.
The system shuts down.

Maintenance Menu

To open the Maintenance menu:
1. Rotate the navigation wheel to highlight the Maintenance >> button in the System
Diagnostics window and press the wheel.
A Password window appears.
2. Enter 1-2-9 in the Password window.
The complete System Diagnostics menu, including Maintenance, appears.

The following sections describe a variety of self- and diagnostic tests that you can run on the monitor, including:
# Self test
# Recorder
# Battery
# Button
# Display
# Audio
# LED
Running the Self Test
The resident self test performs a complete memory and front end test. The monitor could have any of these modules: SpO2, NBP, Temperature. If the test cannot sense a certain module or an error occurs, then the self-test fails.
To run the monitor resident self test:
1. Press the Self Test button.
A window appears displaying the status of the self test. If a test has not completed, the window prints “In Progress”. If a test fails, the window prints “FAILED” in red beside the test.
2. Rotate the wheel to highlight the Return button, then press the wheel to return to the main screen when all tests complete.
The Self Test window closes. Detected errors are written to the error log with detailed error information and error codes.
Testing the Recorder
To test the recorder:
1. In the System Diagnostics menu, rotate the wheel to highlight the Recorder Test button, then press the button to start the test.

The recorder prints a test pattern 

2. Use the pattern to identify the recorder problem; for example, a faulty print head or motor.

Testing the Battery
The battery test communicates with the battery to sense things like battery capacity and type and charging cycle.
To test the battery:
1. In the System Diagnostics menu, rotate the wheel to the Battery Test button, then press the wheel to start the test.

2. To stop the test before the window closes, press the wheel.

Running the Button Test
The Button Test tests the functions of the navigation (rotary) wheel and system buttons. To run the button test:
1. In the System Diagnostics menu, rotate the wheel to highlight Button Test, then press the wheel.
The Buttons/Rotary Wheel Test window appears with several of the system icon buttons in the right side of the window.

2. To test a system icon button, press a button on the monitor.
If the button you press on the monitor is working properly, the corresponding icon in the test window lights with a grey border for five seconds.
3. To test the monitor’s rotary wheel, turn the monitor wheel clockwise or counterclockwise.
If the rotary wheel on the monitor is working properly, then the wheel icon draws red dots in the direction that you turn the wheel.
4. To test each small movement of the monitor’s rotary wheel, move the wheel by small increments.
If the rotary wheel on the monitor is working properly, then the wheel icon displays a red dot for each small movement of the monitor wheel.
5. To end the test, press the monitor rotary wheel.

Testing the Display
To test the display:
1. In the System Diagnostics window, rotate the wheel to highlight the Display Test button, then press the wheel to start the test.
The display test draws a sequence of patterns on the monitor screen. Each pattern displays for five seconds. When the last pattern is drawn, the sequence starts again from the first pattern.

Running the Audio Test
The audio test plays a sample sound on each of the different Db levels. To perform the audio test:
1. In the System Diagnostics menu, rotate the wheel to highlight the Audio Test button, then press the wheel to start the test.
A window appears confirming that the monitor is entering the audio test and displays the text
“Listen for a short tone.” The monitor sounds three short tones at different Db levels. When the test completes, the window closes.

Resetting Parameters
To reset a tracked parameter:
1. In the System Diagnostics menu, rotate the wheel to highlight the Reset button to the right of the parameter you want to reset, NBP Cycle Count, for example, then press the wheel.
A confirmation window appears before the parameter is cleared.
2. In the confirmation window, turn the wheel to highlight Yes, and press it to reset the parameter to 0.

Testing the LED
To test the monitor LED:
1. In the System Diagnostics menu, turn the wheel to highlight the LED Test button, then press the wheel to select the test.
A window appears describing the expected LED behavior during the test. If the battery LED is working properly, it:
# Lights in yellow for five seconds
# Lights in green for five seconds
# Flashes in yellow for five seconds
# Flashes in green for five seconds
The power LED remains green during the test.

Valleylab Force FX Electrosurgical Generator – Test procedure - Checking the Bipolar Output - Checking the Output for the Cut Modes - Checking the Output for the Coag Modes – Medical electronics repair and service

Category: Medical Electronics Repair and Service 

Contents of this article 

• How to test the Bipolar output
• How to test the Cut mode
• How to test the Leakage current 

Valleylab Force FX

Checking the Bipolar Output
1. Verify that the generator successfully completes the self-test as described in Testing the Generator in this section.
2. Connect the test equipment for bipolar output.
a. Connect the two test cables to the Bipolar Instrument receptacle.
b. Pass one test cable through the current transformer and connect the current transformer to the voltmeter.
c. Connect the 100 ohm power resistor across the output jacks at the end of the test cables.
d. Connect the bipolar footswitch to the Bipolar Footswitch receptacle on the rear panel.
3. Press the Precise button and set the bipolar power to 10 watts.
4. Test the output current for the selected Bipolar mode.
a. Press the footswitch pedal and, while activating the generator, note the output on the voltmeter.
b. Release the footswitch pedal.
c. Based on the voltmeter setting and the current transformer you are using, calculate and record the output current.
5. Press the Standard button and repeat step 4.
6. Press the Macro button and repeat step 4.
7. Verify that the generator output for each mode is 316 ± 17 mA rms.
If the output is outside the specified range, calibrate the bipolar output as described in calibration steps 5, 6, 7, and 8. Then repeat this procedure

Check the Output for the Cut Modes
A. Verify that the generator successfully completes the self-test as described in Testing the Generator in this section.
B. Connect the test equipment for monopolar output.
(1) Connect one test cable to the left jack in the Monopolar 1/CEM
Instrument receptacle. Pass the test cable through the current transformer and connect the current transformer to the voltmeter.
(2) Use a test cable to short the two pins on the Patient Return Electrode receptacle.
(3) Connect the second test cable from the voltmeter to both pins of the Patient Return Electrode receptacle.
(4) Connect the 300 ohm resistor across the output jacks at the end of the test cables.
(5) Connect the monopolar footswitch to the Monopolar 1
Footswitch receptacle on the rear panel of the generator.
C. Press the Pure button.
D. Press the Cut up or down arrow buttons to set the cut power to 80 watts.
E. Test the monopolar cut output.
(1) Press the footswitch cut pedal and, while activating the generator, note the output on the voltmeter.
(2) Release the footswitch pedal.
(3) Based on the voltmeter setting and the current transformer you are using, calculate and record the output current.
F. Press the Low cut button and repeat step 1.E.
G. Press the Blend button and repeat step 1.E.
H. Verify that the generator output for each mode is 516 ± 37 mA rms.
If the output is outside the specified range, calibrate the monopolar output as described in calibration steps 5, 6, 7, and 8. Then repeat this procedure.

Check the Output for the Coag Modes
A. Complete items A and B of the previous step, replacing 300 ohm resistor with 500 ohm resistor in item B.4.
B. Press the Desiccate button.
C. Press the Coag up or down  arrow buttons to set the coag power to 80 watts.
D. Test the monopolar coag output.
(1) Press the footswitch coag pedal and, while activating the generator, note the output on the voltmeter.
(2) Release the footswitch pedal.
(3) Based on the voltmeter setting and the current transformer you are using, calculate and record the output current.
E. Press the Fulgurate button and repeat step 2.D.
F. Press the Med (Fulgurate) button and hold for two seconds. After the tone sounds and the "L" appears on the left side of the Coag display, repeat step 2.D.
G. Press the Spray button and repeat step 2.D.
H. Verify that the generator output for each mode is 400 ± 28 mA rms. If the output is outside the specified range, calibrate the monopolar output as described in calibration steps 5, 6, 7, and 8. Then repeat this procedure.

Checking Low Frequency Leakage Current and Ground Resistance
Check the low frequency leakage current and ground resistance before returning the Force FX-8C generator to clinical use.
Equipment required:
# DVM
# Leakage current tester

Output Receptacles and REM Source Current
1. Set the DVM to AC volts (200 millivolts [mV]) and connect the leakage current test circuit.
2. Turn on the generator.
3. Measure between all the output receptacles (including the Patient
Return Electrode receptacle) and earth ground. Record the largest reading.
4. Determine the leakage current using the conventional
1 microamp (µA) per 1 mV.
5. Verify under normal conditions (ground closed, normal polarity) the leakage current is less than 10 µA.
6. Verify single fault conditions (ground open) the leakage current is less than or equal to 50 µA.

Chassis or Earth Leakage
1. Set the DVM to AC volts (200 mV) and connect the leakage current test circuit.
2. Turn on the generator.
3. Measure between the chassis and earth ground.
4. Determine the leakage current using the conventional 1 µA per 1 mV.
5. Verify under normal conditions (ground closed, normal polarity) the
leakage current is less than 100 µA.
6. Verify single fault conditions (ground open) the leakage current is less than or equal to 300 µA.
Output Receptacles and REM Sink Current
1. Set the DVM to AC volts (200 mV) and connect the leakage current test circuit.
2. Turn on the generator and connect the end of the leakage current test circuit to mains voltage through a 120 kΩ resistor.
3. Connect the other side of the IEC leakage load to all of the output receptacles (including the Patient Return Electrode receptacle).
4. Determine the leakage current using the conventional 1 µA per 1 mV.
5. Verify the leakage current is less than or equal to 20 µA.

Checking High Frequency Leakage Current
Check the high frequency leakage current and ground resistance before returning the Force FX-8C generator to clinical use. Check the leakage current
# After calibrating the generator
# Every six months.
Equipment required:
# 200 ohm, 250 watt, noninductive resistor
# Current transformer
# True RMS voltmeter (Fluke 8920 or equivalent)
# Bipolar and monopolar footswitches
Checking Monopolar High Frequency Leakage Current
1. Connect the 200 ohm load from the active accessory through the current transformer to the equipotential ground lug on the rear of the generator.
2. Connect the current transformer to a true RMS voltmeter.
3. Connect a monopolar footswitch to the Monopolar 1 Footswitch receptacle on the rear panel.
4. Activate the footswitch in each Monopolar mode at the maximum control setting. Record the leakage current. If using the leakage table, leakage current should not exceed 150 mA for any mode.
Checking Bipolar High Frequency Leakage Current
1. Remove the monopolar accessories, and connect the 200 ohm load from one side of the bipolar output through the current transformer to the equipotential ground lug on the rear of the generator.
2. Connect the current transformer to the true RMS voltmeter.
3. Connect a bipolar footswitch to the Bipolar Footswitch receptacle on the rear panel.
4. Activate the footswitch in each mode at maximum control setting.
Record the leakage current. It should not exceed 60 mA for any mode using either the leakage table or short lead configuration..