Cosman G4 - Test Equipment; Required Test Equipment; System Testing; Application Program Check

Cosman G4 Radiofrequency Generator Service Manual (SPI 11291 Rev A)
Section 15
15. Test Equipment
• AC Power source • Footswitch
• AC/DC voltmeter • Fully populated USB Card PC board
• 2 Channel Oscilloscope • Scope Probes
• 40/90 Temp Baths • Ground Bond Tester
• Omega Temp meter and Probe • Kelvin test cables
• 4ea Test Plugs • Hipot tester
• Universal safety tester (leakage current
tester)
• 110v-220v adapter plug
• Ground Bond tester
• Resistance Substituter (as needed)
• 4ea 100Ω, 500Ω, and 1KΩ high power
non-inductive resistors
• Power cord • CB112 Cable
• Test leads, Patient Lead • CB103R Cable
• Test Mono-polar Electrode • Test Reference Adaptor Cable
Note: If any of the tests fail, use the schematics and part specs to determine the faulty component or
assembly fill out a Reject tag (SPI#10015-3) attach to the component or assembly under test (PCB,
Transformer, unit assembly, etc) and place in the MRB Area for disposition. On the original Data Sheet
explain the nature of the failure. Obtain a new blank data sheet and restart the testing. The new data sheet
must be attached to the original.
16. System Testing
16.1 Application Program check
Turn the power on and watch the screen for errors that would indicate one or more of the files was not
loaded correctly.
The screen will change to the Main Menu screen.
The Application rev will be displayed on the bottom of the screen.
Record this value for reference purposes on the data sheet
If any errors appear the unit must be returned to Cosman Medical for evaluation and repair.
16.2 Low voltage Oscillator resonance check
Attach a 25  (4x100 ) load between the connectors using test cables.
Using an oscilloscope measure the signal across the output and reference jacks.
With the 25  load the signal should be larger than .5v peak to peak.
Open circuit the signal should be smaller than 2.5v peak to peak.
With a single 100  load the signal should be smaller than 2v peak to peak.
If the values differ substantially from those listed above the unit must be returned to Cosman Medical for
evaluation and repair.
16.3 Touch Screen Display test
A couple of seconds after the unit is turned on the LCD screen will display a Start-Up image.
The first time the system is started or any time the date has not been set (removing the battery) the
system should automatically go to the System Settings display.
Record Pass Fail on the traveler for initial display
If the system date has already been set then you must select the System settings button on the LCD
screen
The display should change to the system settings menu